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/count_by_nondet.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b2fde6a [2018-09-28 10:03:46,512 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 10:03:46,514 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 10:03:46,526 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 10:03:46,527 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 10:03:46,528 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 10:03:46,531 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 10:03:46,533 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 10:03:46,534 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 10:03:46,535 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 10:03:46,536 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-28 10:03:46,536 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-28 10:03:46,537 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-28 10:03:46,538 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-28 10:03:46,539 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-28 10:03:46,540 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-28 10:03:46,541 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-28 10:03:46,542 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-28 10:03:46,544 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-28 10:03:46,546 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-28 10:03:46,547 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-28 10:03:46,548 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-28 10:03:46,551 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-28 10:03:46,551 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-28 10:03:46,551 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-28 10:03:46,552 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-28 10:03:46,553 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-28 10:03:46,554 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-28 10:03:46,555 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-28 10:03:46,557 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-28 10:03:46,557 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-28 10:03:46,558 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-28 10:03:46,558 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-28 10:03:46,560 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-28 10:03:46,561 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-28 10:03:46,562 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-28 10:03:46,562 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 [2018-09-28 10:03:46,586 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 10:03:46,586 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 10:03:46,587 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 10:03:46,587 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 10:03:46,588 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 10:03:46,588 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 10:03:46,589 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 10:03:46,589 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 10:03:46,589 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 10:03:46,589 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 10:03:46,590 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 10:03:46,590 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 10:03:46,591 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 10:03:46,591 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 10:03:46,591 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 10:03:46,591 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 10:03:46,591 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 10:03:46,592 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 10:03:46,593 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 10:03:46,593 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 10:03:46,593 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 10:03:46,593 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 10:03:46,594 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:03:46,594 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 10:03:46,594 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 10:03:46,594 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 10:03:46,595 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 10:03:46,595 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 10:03:46,595 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 10:03:46,595 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 10:03:46,658 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 10:03:46,673 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 10:03:46,679 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 10:03:46,681 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 10:03:46,682 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 10:03:46,682 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_nondet.i_3.bpl [2018-09-28 10:03:46,683 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_nondet.i_3.bpl' [2018-09-28 10:03:46,741 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 10:03:46,744 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 10:03:46,745 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 10:03:46,745 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 10:03:46,745 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 10:03:46,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:03:46" (1/1) ... [2018-09-28 10:03:46,779 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:03:46" (1/1) ... [2018-09-28 10:03:46,786 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 10:03:46,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 10:03:46,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 10:03:46,787 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 10:03:46,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:03:46" (1/1) ... [2018-09-28 10:03:46,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:03:46" (1/1) ... [2018-09-28 10:03:46,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:03:46" (1/1) ... [2018-09-28 10:03:46,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:03:46" (1/1) ... [2018-09-28 10:03:46,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:03:46" (1/1) ... [2018-09-28 10:03:46,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:03:46" (1/1) ... [2018-09-28 10:03:46,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:03:46" (1/1) ... [2018-09-28 10:03:46,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 10:03:46,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 10:03:46,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 10:03:46,811 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 10:03:46,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:03:46" (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 [2018-09-28 10:03:46,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-28 10:03:46,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-28 10:03:47,100 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-28 10:03:47,100 INFO L202 PluginConnector]: Adding new model count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:03:47 BoogieIcfgContainer [2018-09-28 10:03:47,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 10:03:47,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 10:03:47,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 10:03:47,106 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 10:03:47,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:03:46" (1/2) ... [2018-09-28 10:03:47,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68524849 and model type count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 10:03:47, skipping insertion in model container [2018-09-28 10:03:47,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:03:47" (2/2) ... [2018-09-28 10:03:47,109 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_nondet.i_3.bpl [2018-09-28 10:03:47,119 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 10:03:47,131 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-28 10:03:47,186 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 10:03:47,187 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 10:03:47,187 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 10:03:47,188 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 10:03:47,188 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 10:03:47,188 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 10:03:47,188 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 10:03:47,189 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 10:03:47,189 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 10:03:47,205 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-28 10:03:47,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-28 10:03:47,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:47,221 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-28 10:03:47,222 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:47,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:47,229 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-28 10:03:47,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:47,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:47,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:47,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:03:47,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:47,429 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:03:47,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-28 10:03:47,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 10:03:47,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 10:03:47,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-28 10:03:47,451 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-28 10:03:47,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:47,497 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-28 10:03:47,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 10:03:47,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-28 10:03:47,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:47,510 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:03:47,510 INFO L226 Difference]: Without dead ends: 7 [2018-09-28 10:03:47,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-28 10:03:47,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-28 10:03:47,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-28 10:03:47,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-28 10:03:47,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-28 10:03:47,551 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-28 10:03:47,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:47,551 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-28 10:03:47,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 10:03:47,552 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-28 10:03:47,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-28 10:03:47,552 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:47,552 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-28 10:03:47,553 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:47,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:47,553 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-28 10:03:47,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:47,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:47,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:47,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:03:47,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:47,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:47,705 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 [2018-09-28 10:03:47,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:03:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:47,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:47,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:47,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-28 10:03:47,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-28 10:03:47,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-28 10:03:47,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-28 10:03:47,815 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-28 10:03:47,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:47,910 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-28 10:03:47,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:03:47,911 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-28 10:03:47,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:47,912 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:03:47,912 INFO L226 Difference]: Without dead ends: 9 [2018-09-28 10:03:47,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-28 10:03:47,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-28 10:03:47,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-28 10:03:47,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-28 10:03:47,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-28 10:03:47,916 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-28 10:03:47,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:47,916 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-28 10:03:47,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-28 10:03:47,917 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-28 10:03:47,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 10:03:47,920 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:47,921 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-28 10:03:47,921 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:47,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:47,921 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-28 10:03:47,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:47,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:47,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:47,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:03:47,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:47,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:48,086 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:48,086 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 [2018-09-28 10:03:48,101 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:03:48,138 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:03:48,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:48,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:48,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:48,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:03:48,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:03:48,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:03:48,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-28 10:03:48,170 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-28 10:03:48,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:48,231 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-28 10:03:48,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:03:48,232 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-28 10:03:48,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:48,232 INFO L225 Difference]: With dead ends: 13 [2018-09-28 10:03:48,233 INFO L226 Difference]: Without dead ends: 11 [2018-09-28 10:03:48,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-28 10:03:48,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-28 10:03:48,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-28 10:03:48,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-28 10:03:48,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-28 10:03:48,237 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-28 10:03:48,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:48,238 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-28 10:03:48,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:03:48,238 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-28 10:03:48,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-28 10:03:48,239 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:48,239 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-28 10:03:48,239 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:48,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:48,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-28 10:03:48,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:48,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:48,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:48,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:48,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:48,403 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:48,403 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) [2018-09-28 10:03:48,422 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:03:48,458 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-28 10:03:48,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:48,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:48,489 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:48,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:03:48,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:03:48,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:03:48,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:03:48,490 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-28 10:03:48,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:48,528 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-28 10:03:48,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:03:48,529 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-28 10:03:48,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:48,529 INFO L225 Difference]: With dead ends: 15 [2018-09-28 10:03:48,529 INFO L226 Difference]: Without dead ends: 13 [2018-09-28 10:03:48,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:03:48,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-28 10:03:48,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-28 10:03:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-28 10:03:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-28 10:03:48,534 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-28 10:03:48,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:48,534 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-28 10:03:48,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:03:48,535 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-28 10:03:48,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-28 10:03:48,535 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:48,535 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-28 10:03:48,536 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:48,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:48,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-28 10:03:48,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:48,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:48,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:48,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:48,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:48,911 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:48,912 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 [2018-09-28 10:03:48,929 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:03:48,978 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:03:48,979 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:48,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:49,015 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:49,015 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:03:49,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:03:49,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:03:49,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:03:49,017 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-28 10:03:49,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:49,047 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-28 10:03:49,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:03:49,047 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-28 10:03:49,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:49,048 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:03:49,048 INFO L226 Difference]: Without dead ends: 15 [2018-09-28 10:03:49,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:03:49,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-28 10:03:49,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-28 10:03:49,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-28 10:03:49,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-28 10:03:49,053 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-28 10:03:49,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:49,054 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-28 10:03:49,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:03:49,054 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-28 10:03:49,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 10:03:49,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:49,055 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-28 10:03:49,055 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:49,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:49,056 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-28 10:03:49,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:49,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:49,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:49,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:49,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:49,188 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:49,188 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 [2018-09-28 10:03:49,196 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:03:49,286 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-28 10:03:49,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:49,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:49,315 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:49,316 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:03:49,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:03:49,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:03:49,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:03:49,317 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-28 10:03:49,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:49,354 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-28 10:03:49,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:03:49,356 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-28 10:03:49,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:49,356 INFO L225 Difference]: With dead ends: 19 [2018-09-28 10:03:49,356 INFO L226 Difference]: Without dead ends: 17 [2018-09-28 10:03:49,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:03:49,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-28 10:03:49,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-28 10:03:49,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-28 10:03:49,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-28 10:03:49,362 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-28 10:03:49,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:49,363 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-28 10:03:49,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:03:49,363 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-28 10:03:49,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-28 10:03:49,364 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:49,364 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-28 10:03:49,364 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:49,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:49,365 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-28 10:03:49,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:49,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:49,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:49,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:49,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:49,514 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:49,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:49,514 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 [2018-09-28 10:03:49,529 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:03:49,579 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:03:49,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:49,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:49,620 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:49,620 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:03:49,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:03:49,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:03:49,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:03:49,624 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-28 10:03:49,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:49,691 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-28 10:03:49,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:03:49,692 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-28 10:03:49,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:49,692 INFO L225 Difference]: With dead ends: 21 [2018-09-28 10:03:49,693 INFO L226 Difference]: Without dead ends: 19 [2018-09-28 10:03:49,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:03:49,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-28 10:03:49,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-28 10:03:49,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-28 10:03:49,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-28 10:03:49,698 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-28 10:03:49,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:49,698 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-28 10:03:49,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:03:49,699 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-28 10:03:49,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 10:03:49,699 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:49,699 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-28 10:03:49,700 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:49,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:49,700 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-28 10:03:49,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:49,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:49,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:49,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:49,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:50,173 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:50,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:50,174 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 [2018-09-28 10:03:50,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:03:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:50,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:50,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:50,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:03:50,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:03:50,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:03:50,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:03:50,245 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-28 10:03:50,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:50,279 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-28 10:03:50,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:03:50,280 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-28 10:03:50,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:50,281 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:03:50,281 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 10:03:50,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:03:50,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 10:03:50,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-28 10:03:50,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-28 10:03:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-28 10:03:50,286 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-28 10:03:50,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:50,286 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-28 10:03:50,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:03:50,287 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-28 10:03:50,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-28 10:03:50,287 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:50,288 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-28 10:03:50,288 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:50,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:50,288 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-28 10:03:50,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:50,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:50,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:50,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:03:50,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:50,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:50,609 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 [2018-09-28 10:03:50,627 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:03:50,663 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:03:50,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:50,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:50,675 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:50,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:50,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:03:50,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:03:50,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:03:50,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:03:50,700 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-28 10:03:50,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:50,778 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-28 10:03:50,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:03:50,779 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-28 10:03:50,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:50,780 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:03:50,780 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:03:50,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:03:50,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:03:50,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-28 10:03:50,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-28 10:03:50,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-28 10:03:50,785 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-28 10:03:50,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:50,786 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-28 10:03:50,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:03:50,786 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-28 10:03:50,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 10:03:50,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:50,787 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-28 10:03:50,787 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:50,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:50,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-28 10:03:50,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:50,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:50,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:50,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:50,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:51,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:51,014 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 [2018-09-28 10:03:51,029 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:03:51,067 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-28 10:03:51,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:51,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:51,101 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:51,102 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-28 10:03:51,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 10:03:51,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 10:03:51,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-28 10:03:51,103 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-28 10:03:51,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:51,161 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-28 10:03:51,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 10:03:51,162 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-28 10:03:51,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:51,162 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:03:51,163 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:03:51,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-28 10:03:51,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:03:51,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-28 10:03:51,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-28 10:03:51,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-28 10:03:51,168 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-28 10:03:51,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:51,169 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-28 10:03:51,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 10:03:51,169 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-28 10:03:51,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-28 10:03:51,170 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:51,170 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-28 10:03:51,170 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:51,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:51,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-28 10:03:51,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:51,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:51,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:51,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:51,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:51,547 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:51,548 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:51,548 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 [2018-09-28 10:03:51,558 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:03:51,585 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:03:51,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:51,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:51,620 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:51,620 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-28 10:03:51,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 10:03:51,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 10:03:51,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-28 10:03:51,622 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-28 10:03:51,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:51,658 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-28 10:03:51,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 10:03:51,659 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-28 10:03:51,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:51,660 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:03:51,660 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:03:51,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-28 10:03:51,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:03:51,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-28 10:03:51,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-28 10:03:51,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-28 10:03:51,665 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-28 10:03:51,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:51,666 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-28 10:03:51,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 10:03:51,666 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-28 10:03:51,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-28 10:03:51,667 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:51,667 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-28 10:03:51,667 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:51,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:51,667 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-28 10:03:51,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:51,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:51,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:51,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:51,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:52,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:52,151 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 [2018-09-28 10:03:52,162 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:03:52,213 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-28 10:03:52,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:52,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:52,249 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:52,249 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-28 10:03:52,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 10:03:52,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 10:03:52,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-28 10:03:52,251 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-28 10:03:52,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:52,503 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-28 10:03:52,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-28 10:03:52,504 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-28 10:03:52,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:52,505 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:03:52,505 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:03:52,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-28 10:03:52,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:03:52,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-28 10:03:52,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-28 10:03:52,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-28 10:03:52,511 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-28 10:03:52,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:52,511 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-28 10:03:52,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 10:03:52,511 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-28 10:03:52,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-28 10:03:52,512 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:52,512 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-28 10:03:52,513 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:52,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:52,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-28 10:03:52,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:52,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:52,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:52,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:52,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:52,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:52,866 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 [2018-09-28 10:03:52,876 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:03:52,907 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-28 10:03:52,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:52,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:52,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:52,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-28 10:03:52,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 10:03:52,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 10:03:52,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-28 10:03:52,954 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-28 10:03:53,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:53,006 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-28 10:03:53,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 10:03:53,007 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-28 10:03:53,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:53,008 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:03:53,008 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:03:53,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-28 10:03:53,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:03:53,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-28 10:03:53,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-28 10:03:53,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-28 10:03:53,015 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-28 10:03:53,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:53,016 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-28 10:03:53,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 10:03:53,016 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-28 10:03:53,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-28 10:03:53,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:53,017 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-28 10:03:53,017 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:53,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:53,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-28 10:03:53,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:53,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:53,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:53,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:53,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:53,250 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:53,251 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 [2018-09-28 10:03:53,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:03:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:53,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:53,324 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:53,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-28 10:03:53,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 10:03:53,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 10:03:53,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-28 10:03:53,326 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-28 10:03:53,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:53,431 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-28 10:03:53,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 10:03:53,433 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-28 10:03:53,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:53,433 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:03:53,433 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:03:53,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-28 10:03:53,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:03:53,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-28 10:03:53,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-28 10:03:53,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-28 10:03:53,443 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-28 10:03:53,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:53,443 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-28 10:03:53,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 10:03:53,443 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-28 10:03:53,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-28 10:03:53,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:53,444 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-28 10:03:53,445 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:53,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:53,445 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-28 10:03:53,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:53,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:53,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:53,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:03:53,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:53,774 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:53,775 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:53,775 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 [2018-09-28 10:03:53,788 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:03:53,839 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:03:53,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:53,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:53,856 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:53,878 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:53,878 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-28 10:03:53,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 10:03:53,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 10:03:53,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-28 10:03:53,879 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-28 10:03:53,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:53,912 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-28 10:03:53,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:03:53,912 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-28 10:03:53,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:53,913 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:03:53,913 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:03:53,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-28 10:03:53,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:03:53,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-28 10:03:53,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-28 10:03:53,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-28 10:03:53,919 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-28 10:03:53,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:53,920 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-28 10:03:53,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 10:03:53,920 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-28 10:03:53,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-28 10:03:53,921 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:53,921 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-28 10:03:53,921 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:53,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:53,922 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-28 10:03:53,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:53,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:53,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:53,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:53,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:54,281 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:54,281 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 [2018-09-28 10:03:54,291 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:03:54,440 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-28 10:03:54,441 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:54,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:54,496 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:54,496 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-28 10:03:54,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 10:03:54,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 10:03:54,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-28 10:03:54,497 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-28 10:03:54,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:54,587 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-28 10:03:54,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-28 10:03:54,589 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-28 10:03:54,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:54,590 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:03:54,590 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:03:54,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-28 10:03:54,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:03:54,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-28 10:03:54,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-28 10:03:54,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-28 10:03:54,595 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-28 10:03:54,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:54,595 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-28 10:03:54,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 10:03:54,596 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-28 10:03:54,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-28 10:03:54,596 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:54,596 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-28 10:03:54,597 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:54,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:54,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-28 10:03:54,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:54,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:54,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:54,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:54,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:55,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:55,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:03:55,352 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:03:55,398 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:03:55,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:55,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:55,450 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:55,450 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-28 10:03:55,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-28 10:03:55,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-28 10:03:55,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-28 10:03:55,451 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-28 10:03:55,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:55,558 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-28 10:03:55,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 10:03:55,559 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-28 10:03:55,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:55,560 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:03:55,560 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:03:55,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-28 10:03:55,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:03:55,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-28 10:03:55,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-28 10:03:55,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-28 10:03:55,566 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-28 10:03:55,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:55,567 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-28 10:03:55,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-28 10:03:55,567 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-28 10:03:55,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-28 10:03:55,568 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:55,568 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-28 10:03:55,568 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:55,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:55,568 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-28 10:03:55,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:55,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:55,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:55,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:55,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:56,445 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:56,446 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:56,446 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 [2018-09-28 10:03:56,453 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:03:56,518 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-28 10:03:56,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:56,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:56,532 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:56,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:56,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-28 10:03:56,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:03:56,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:03:56,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-28 10:03:56,566 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-09-28 10:03:56,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:56,656 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-28 10:03:56,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 10:03:56,657 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-28 10:03:56,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:56,657 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:03:56,657 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:03:56,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-28 10:03:56,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:03:56,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-28 10:03:56,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-28 10:03:56,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-28 10:03:56,662 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-28 10:03:56,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:56,663 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-28 10:03:56,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 10:03:56,663 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-28 10:03:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-28 10:03:56,663 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:56,664 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-28 10:03:56,664 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:56,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:56,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-09-28 10:03:56,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:56,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:56,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:56,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:56,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:57,022 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:57,022 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 [2018-09-28 10:03:57,029 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:03:57,111 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-28 10:03:57,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:57,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:57,129 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:57,153 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:57,153 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-28 10:03:57,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-28 10:03:57,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-28 10:03:57,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-28 10:03:57,154 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-09-28 10:03:57,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:57,498 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-28 10:03:57,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 10:03:57,499 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-28 10:03:57,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:57,499 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:03:57,500 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:03:57,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-28 10:03:57,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:03:57,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-28 10:03:57,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-28 10:03:57,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-28 10:03:57,505 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-28 10:03:57,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:57,505 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-28 10:03:57,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-28 10:03:57,505 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-28 10:03:57,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-28 10:03:57,506 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:57,506 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-28 10:03:57,507 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:57,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:57,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-09-28 10:03:57,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:57,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:57,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:57,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:57,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:58,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:58,690 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 [2018-09-28 10:03:58,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:03:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:58,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:58,747 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:58,776 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:58,776 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-28 10:03:58,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-28 10:03:58,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-28 10:03:58,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-28 10:03:58,778 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-09-28 10:03:58,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:58,883 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-28 10:03:58,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-28 10:03:58,884 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-28 10:03:58,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:58,884 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:03:58,885 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:03:58,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-28 10:03:58,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:03:58,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-28 10:03:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-28 10:03:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-28 10:03:58,891 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-28 10:03:58,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:58,891 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-28 10:03:58,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-28 10:03:58,891 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-28 10:03:58,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-28 10:03:58,892 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:58,892 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-28 10:03:58,892 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:58,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:58,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-09-28 10:03:58,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:58,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:58,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:58,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:03:58,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:59,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:59,286 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 [2018-09-28 10:03:59,299 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:03:59,334 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:03:59,335 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:59,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:59,379 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:59,379 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-28 10:03:59,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-28 10:03:59,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-28 10:03:59,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-28 10:03:59,380 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-09-28 10:03:59,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:59,503 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-28 10:03:59,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:03:59,503 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-28 10:03:59,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:59,504 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:03:59,504 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:03:59,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-28 10:03:59,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:03:59,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-28 10:03:59,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-28 10:03:59,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-28 10:03:59,511 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-28 10:03:59,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:59,511 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-28 10:03:59,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-28 10:03:59,512 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-28 10:03:59,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-28 10:03:59,512 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:59,513 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-28 10:03:59,513 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:59,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:59,513 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-09-28 10:03:59,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:59,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:59,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:59,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:59,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:59,908 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:59,909 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 [2018-09-28 10:03:59,916 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:03:59,965 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-28 10:03:59,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:59,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:00,006 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:00,006 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-28 10:04:00,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-28 10:04:00,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-28 10:04:00,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-28 10:04:00,008 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-09-28 10:04:00,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:00,246 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-28 10:04:00,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 10:04:00,248 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-28 10:04:00,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:00,249 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:04:00,249 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:04:00,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-28 10:04:00,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:04:00,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-28 10:04:00,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-28 10:04:00,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-28 10:04:00,254 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-28 10:04:00,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:00,254 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-28 10:04:00,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-28 10:04:00,255 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-28 10:04:00,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-28 10:04:00,255 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:00,255 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-28 10:04:00,256 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:00,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:00,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-09-28 10:04:00,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:00,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:00,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:00,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:00,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:00,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:00,652 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:00,652 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 [2018-09-28 10:04:00,660 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:04:00,697 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:04:00,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:00,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:00,737 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:00,737 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-28 10:04:00,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-28 10:04:00,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-28 10:04:00,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-28 10:04:00,739 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-09-28 10:04:00,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:00,797 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-28 10:04:00,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 10:04:00,799 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-28 10:04:00,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:00,799 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:04:00,799 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:04:00,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-28 10:04:00,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:04:00,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-28 10:04:00,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-28 10:04:00,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-28 10:04:00,804 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-28 10:04:00,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:00,804 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-28 10:04:00,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-28 10:04:00,804 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-28 10:04:00,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-28 10:04:00,805 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:00,805 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-28 10:04:00,805 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:00,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:00,805 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-09-28 10:04:00,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:00,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:00,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:00,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:00,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:01,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:01,733 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 [2018-09-28 10:04:01,740 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:04:01,802 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-28 10:04:01,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:01,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:01,847 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:01,847 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-28 10:04:01,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-28 10:04:01,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-28 10:04:01,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-28 10:04:01,848 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-09-28 10:04:02,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:02,021 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-28 10:04:02,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-28 10:04:02,021 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-28 10:04:02,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:02,022 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:04:02,022 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:04:02,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-28 10:04:02,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:04:02,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-28 10:04:02,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-28 10:04:02,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-28 10:04:02,025 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-28 10:04:02,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:02,025 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-28 10:04:02,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-28 10:04:02,026 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-28 10:04:02,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-28 10:04:02,026 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:02,026 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-09-28 10:04:02,027 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:02,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:02,027 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-09-28 10:04:02,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:02,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:02,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:02,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:02,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:02,767 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:02,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:02,767 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 [2018-09-28 10:04:02,774 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:04:02,821 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-28 10:04:02,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:02,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:02,834 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:02,863 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:02,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-28 10:04:02,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-28 10:04:02,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-28 10:04:02,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-28 10:04:02,864 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-09-28 10:04:02,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:02,952 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-28 10:04:02,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 10:04:02,952 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-28 10:04:02,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:02,953 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:04:02,953 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:04:02,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-28 10:04:02,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:04:02,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-28 10:04:02,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-28 10:04:02,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-28 10:04:02,959 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-28 10:04:02,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:02,959 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-28 10:04:02,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-28 10:04:02,959 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-28 10:04:02,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-28 10:04:02,960 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:02,960 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-28 10:04:02,960 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:02,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:02,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-09-28 10:04:02,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:02,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:02,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:02,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:02,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:02,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:03,998 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:03,999 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:03,999 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 [2018-09-28 10:04:04,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:04:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:04,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:04,095 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:04,095 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-28 10:04:04,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-28 10:04:04,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-28 10:04:04,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-28 10:04:04,096 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-09-28 10:04:04,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:04,131 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-28 10:04:04,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-28 10:04:04,131 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-28 10:04:04,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:04,132 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:04:04,132 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:04:04,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-28 10:04:04,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:04:04,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-28 10:04:04,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-28 10:04:04,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-28 10:04:04,137 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-28 10:04:04,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:04,137 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-28 10:04:04,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-28 10:04:04,137 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-28 10:04:04,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-28 10:04:04,138 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:04,138 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-09-28 10:04:04,138 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:04,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:04,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-09-28 10:04:04,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:04,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:04,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:04,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:04:04,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:04,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:05,433 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:05,433 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) [2018-09-28 10:04:05,449 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:04:05,503 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:04:05,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:05,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:05,544 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:05,544 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-28 10:04:05,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-28 10:04:05,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-28 10:04:05,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-28 10:04:05,546 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-09-28 10:04:05,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:05,625 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-28 10:04:05,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 10:04:05,625 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-28 10:04:05,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:05,626 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:04:05,626 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:04:05,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-28 10:04:05,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:04:05,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-28 10:04:05,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-28 10:04:05,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-28 10:04:05,630 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-28 10:04:05,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:05,630 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-28 10:04:05,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-28 10:04:05,631 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-28 10:04:05,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-28 10:04:05,631 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:05,631 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-28 10:04:05,631 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:05,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:05,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-09-28 10:04:05,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:05,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:05,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:05,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:05,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:06,113 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:06,113 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 [2018-09-28 10:04:06,121 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:04:06,181 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-28 10:04:06,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:06,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:06,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:06,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-28 10:04:06,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-28 10:04:06,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-28 10:04:06,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-28 10:04:06,234 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-09-28 10:04:06,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:06,338 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-28 10:04:06,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-28 10:04:06,338 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-28 10:04:06,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:06,339 INFO L225 Difference]: With dead ends: 63 [2018-09-28 10:04:06,339 INFO L226 Difference]: Without dead ends: 61 [2018-09-28 10:04:06,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-28 10:04:06,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-28 10:04:06,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-28 10:04:06,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-28 10:04:06,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-28 10:04:06,343 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-28 10:04:06,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:06,343 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-28 10:04:06,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-28 10:04:06,343 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-28 10:04:06,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-28 10:04:06,344 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:06,344 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-09-28 10:04:06,344 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:06,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:06,345 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-09-28 10:04:06,345 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:06,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:06,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:06,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:06,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:06,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:06,970 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 [2018-09-28 10:04:06,979 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:04:07,024 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:04:07,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:07,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:07,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:07,070 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-28 10:04:07,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-28 10:04:07,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-28 10:04:07,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-28 10:04:07,071 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-09-28 10:04:07,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:07,166 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-28 10:04:07,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-28 10:04:07,166 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-28 10:04:07,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:07,167 INFO L225 Difference]: With dead ends: 65 [2018-09-28 10:04:07,167 INFO L226 Difference]: Without dead ends: 63 [2018-09-28 10:04:07,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-28 10:04:07,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-28 10:04:07,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-28 10:04:07,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-28 10:04:07,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-28 10:04:07,171 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-28 10:04:07,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:07,171 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-28 10:04:07,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-28 10:04:07,171 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-28 10:04:07,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-28 10:04:07,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:07,172 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-28 10:04:07,172 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:07,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:07,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-09-28 10:04:07,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:07,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:07,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:07,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:07,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:07,701 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:07,701 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 [2018-09-28 10:04:07,709 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:04:07,780 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-28 10:04:07,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:07,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:07,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:07,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-28 10:04:07,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-28 10:04:07,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-28 10:04:07,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-28 10:04:07,830 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-09-28 10:04:07,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:07,934 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-28 10:04:07,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 10:04:07,934 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-28 10:04:07,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:07,935 INFO L225 Difference]: With dead ends: 67 [2018-09-28 10:04:07,935 INFO L226 Difference]: Without dead ends: 65 [2018-09-28 10:04:07,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-28 10:04:07,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-28 10:04:07,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-28 10:04:07,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-28 10:04:07,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-28 10:04:07,940 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-09-28 10:04:07,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:07,940 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-28 10:04:07,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-28 10:04:07,941 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-28 10:04:07,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-28 10:04:07,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:07,941 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-09-28 10:04:07,941 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:07,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:07,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-09-28 10:04:07,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:07,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:07,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:07,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:07,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:09,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:09,375 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 [2018-09-28 10:04:09,384 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:04:09,444 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-28 10:04:09,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:09,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:09,482 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:09,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-28 10:04:09,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-28 10:04:09,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-28 10:04:09,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-28 10:04:09,484 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-09-28 10:04:09,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:09,593 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-28 10:04:09,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-28 10:04:09,593 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-28 10:04:09,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:09,594 INFO L225 Difference]: With dead ends: 69 [2018-09-28 10:04:09,594 INFO L226 Difference]: Without dead ends: 67 [2018-09-28 10:04:09,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-28 10:04:09,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-28 10:04:09,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-28 10:04:09,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-28 10:04:09,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-28 10:04:09,598 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-09-28 10:04:09,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:09,598 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-28 10:04:09,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-28 10:04:09,598 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-28 10:04:09,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-28 10:04:09,602 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:09,602 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-09-28 10:04:09,602 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:09,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:09,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-09-28 10:04:09,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:09,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:09,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:09,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:09,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:10,121 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:10,121 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 [2018-09-28 10:04:10,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:04:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:10,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:10,197 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:10,219 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:10,219 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-28 10:04:10,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-28 10:04:10,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-28 10:04:10,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 10:04:10,220 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-09-28 10:04:10,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:10,285 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-28 10:04:10,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 10:04:10,286 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-28 10:04:10,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:10,286 INFO L225 Difference]: With dead ends: 71 [2018-09-28 10:04:10,287 INFO L226 Difference]: Without dead ends: 69 [2018-09-28 10:04:10,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 10:04:10,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-28 10:04:10,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-28 10:04:10,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-28 10:04:10,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-28 10:04:10,291 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-09-28 10:04:10,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:10,291 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-28 10:04:10,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-28 10:04:10,291 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-28 10:04:10,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-28 10:04:10,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:10,292 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-09-28 10:04:10,292 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:10,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:10,292 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-09-28 10:04:10,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:10,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:10,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:10,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:04:10,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:11,034 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:11,034 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 [2018-09-28 10:04:11,041 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:04:11,098 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:04:11,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:11,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:11,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:11,136 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:11,136 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-28 10:04:11,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-28 10:04:11,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-28 10:04:11,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-28 10:04:11,138 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-09-28 10:04:11,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:11,190 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-28 10:04:11,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 10:04:11,191 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-28 10:04:11,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:11,192 INFO L225 Difference]: With dead ends: 73 [2018-09-28 10:04:11,192 INFO L226 Difference]: Without dead ends: 71 [2018-09-28 10:04:11,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-28 10:04:11,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-28 10:04:11,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-28 10:04:11,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-28 10:04:11,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-28 10:04:11,197 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-09-28 10:04:11,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:11,197 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-28 10:04:11,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-28 10:04:11,198 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-28 10:04:11,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-28 10:04:11,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:11,199 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-09-28 10:04:11,199 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:11,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:11,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-09-28 10:04:11,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:11,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:11,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:11,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:11,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:12,307 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:12,307 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 [2018-09-28 10:04:12,314 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:04:12,382 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-28 10:04:12,383 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:12,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:12,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:12,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-28 10:04:12,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-28 10:04:12,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-28 10:04:12,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-28 10:04:12,418 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-09-28 10:04:12,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:12,501 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-28 10:04:12,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-28 10:04:12,503 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-28 10:04:12,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:12,504 INFO L225 Difference]: With dead ends: 75 [2018-09-28 10:04:12,504 INFO L226 Difference]: Without dead ends: 73 [2018-09-28 10:04:12,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-28 10:04:12,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-28 10:04:12,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-28 10:04:12,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-28 10:04:12,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-28 10:04:12,507 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-09-28 10:04:12,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:12,507 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-28 10:04:12,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-28 10:04:12,507 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-28 10:04:12,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-28 10:04:12,508 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:12,508 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-09-28 10:04:12,508 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:12,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:12,508 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-09-28 10:04:12,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:12,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:12,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:12,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:12,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:13,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:13,119 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:13,119 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 [2018-09-28 10:04:13,126 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:04:13,183 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:04:13,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:13,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:13,217 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:13,218 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-28 10:04:13,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-28 10:04:13,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-28 10:04:13,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-28 10:04:13,219 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-09-28 10:04:13,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:13,388 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-28 10:04:13,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-28 10:04:13,388 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-28 10:04:13,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:13,389 INFO L225 Difference]: With dead ends: 77 [2018-09-28 10:04:13,389 INFO L226 Difference]: Without dead ends: 75 [2018-09-28 10:04:13,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-28 10:04:13,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-28 10:04:13,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-28 10:04:13,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-28 10:04:13,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-28 10:04:13,393 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-09-28 10:04:13,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:13,394 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-28 10:04:13,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-28 10:04:13,394 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-28 10:04:13,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-28 10:04:13,394 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:13,394 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-09-28 10:04:13,395 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:13,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:13,395 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-09-28 10:04:13,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:13,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:13,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:13,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:13,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:13,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:14,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:14,091 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 [2018-09-28 10:04:14,099 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:04:14,175 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-28 10:04:14,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:14,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:14,222 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:14,223 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-28 10:04:14,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-28 10:04:14,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-28 10:04:14,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-28 10:04:14,224 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-09-28 10:04:14,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:14,288 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-28 10:04:14,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-28 10:04:14,288 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-28 10:04:14,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:14,289 INFO L225 Difference]: With dead ends: 79 [2018-09-28 10:04:14,289 INFO L226 Difference]: Without dead ends: 77 [2018-09-28 10:04:14,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-28 10:04:14,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-28 10:04:14,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-28 10:04:14,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-28 10:04:14,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-28 10:04:14,294 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-09-28 10:04:14,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:14,294 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-28 10:04:14,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-28 10:04:14,295 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-28 10:04:14,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-28 10:04:14,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:14,295 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-09-28 10:04:14,295 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:14,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:14,296 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-09-28 10:04:14,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:14,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:14,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:14,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:14,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:14,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:15,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:15,052 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 [2018-09-28 10:04:15,060 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:04:15,138 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-28 10:04:15,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:15,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:15,177 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:15,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-28 10:04:15,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-28 10:04:15,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-28 10:04:15,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-28 10:04:15,179 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-09-28 10:04:15,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:15,237 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-28 10:04:15,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-28 10:04:15,237 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-28 10:04:15,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:15,238 INFO L225 Difference]: With dead ends: 81 [2018-09-28 10:04:15,238 INFO L226 Difference]: Without dead ends: 79 [2018-09-28 10:04:15,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-28 10:04:15,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-28 10:04:15,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-28 10:04:15,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-28 10:04:15,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-28 10:04:15,243 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-09-28 10:04:15,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:15,244 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-28 10:04:15,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-28 10:04:15,244 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-28 10:04:15,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-28 10:04:15,244 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:15,244 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-09-28 10:04:15,245 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:15,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:15,245 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-09-28 10:04:15,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:15,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:15,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:15,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:15,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:16,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:16,409 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 [2018-09-28 10:04:16,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:04:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:16,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:16,522 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:16,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-28 10:04:16,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-28 10:04:16,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-28 10:04:16,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-28 10:04:16,523 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-09-28 10:04:16,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:16,620 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-28 10:04:16,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-28 10:04:16,621 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-28 10:04:16,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:16,622 INFO L225 Difference]: With dead ends: 83 [2018-09-28 10:04:16,622 INFO L226 Difference]: Without dead ends: 81 [2018-09-28 10:04:16,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-28 10:04:16,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-28 10:04:16,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-28 10:04:16,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-28 10:04:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-28 10:04:16,626 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-09-28 10:04:16,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:16,626 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-28 10:04:16,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-28 10:04:16,626 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-28 10:04:16,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-28 10:04:16,627 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:16,627 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-09-28 10:04:16,627 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:16,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:16,627 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-09-28 10:04:16,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:16,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:16,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:16,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:04:16,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:16,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:17,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:17,724 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:17,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:04:17,731 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:04:17,795 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:04:17,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:17,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:17,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:17,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-28 10:04:17,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-28 10:04:17,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-28 10:04:17,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-28 10:04:17,835 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-09-28 10:04:17,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:17,912 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-28 10:04:17,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-28 10:04:17,913 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-28 10:04:17,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:17,914 INFO L225 Difference]: With dead ends: 85 [2018-09-28 10:04:17,914 INFO L226 Difference]: Without dead ends: 83 [2018-09-28 10:04:17,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-28 10:04:17,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-28 10:04:17,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-28 10:04:17,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-28 10:04:17,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-28 10:04:17,918 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-09-28 10:04:17,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:17,918 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-28 10:04:17,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-28 10:04:17,918 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-28 10:04:17,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-28 10:04:17,919 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:17,919 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-09-28 10:04:17,919 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:17,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:17,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-09-28 10:04:17,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:17,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:17,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:17,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:17,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:18,630 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:18,630 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 [2018-09-28 10:04:18,637 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:04:18,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-28 10:04:18,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:18,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:18,775 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:18,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-28 10:04:18,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-28 10:04:18,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-28 10:04:18,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-28 10:04:18,777 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-09-28 10:04:19,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:19,150 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-28 10:04:19,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-28 10:04:19,150 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-28 10:04:19,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:19,151 INFO L225 Difference]: With dead ends: 87 [2018-09-28 10:04:19,152 INFO L226 Difference]: Without dead ends: 85 [2018-09-28 10:04:19,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-28 10:04:19,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-28 10:04:19,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-28 10:04:19,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-28 10:04:19,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-28 10:04:19,155 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-09-28 10:04:19,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:19,156 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-28 10:04:19,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-28 10:04:19,156 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-28 10:04:19,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-28 10:04:19,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:19,156 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-09-28 10:04:19,157 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:19,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:19,157 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-09-28 10:04:19,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:19,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:19,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:19,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:19,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:19,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:19,951 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:19,951 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 [2018-09-28 10:04:19,959 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:04:20,021 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:04:20,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:20,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:20,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:20,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:20,058 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-28 10:04:20,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-28 10:04:20,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-28 10:04:20,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-28 10:04:20,059 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-09-28 10:04:20,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:20,135 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-28 10:04:20,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-28 10:04:20,136 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-28 10:04:20,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:20,137 INFO L225 Difference]: With dead ends: 89 [2018-09-28 10:04:20,137 INFO L226 Difference]: Without dead ends: 87 [2018-09-28 10:04:20,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-28 10:04:20,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-28 10:04:20,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-28 10:04:20,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-28 10:04:20,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-28 10:04:20,141 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-09-28 10:04:20,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:20,142 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-28 10:04:20,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-28 10:04:20,142 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-28 10:04:20,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-28 10:04:20,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:20,143 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-09-28 10:04:20,143 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:20,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:20,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-09-28 10:04:20,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:20,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:20,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:20,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:20,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:21,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:21,272 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 [2018-09-28 10:04:21,279 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:04:21,539 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-28 10:04:21,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:21,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:21,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:21,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-28 10:04:21,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-28 10:04:21,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-28 10:04:21,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-28 10:04:21,582 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-09-28 10:04:21,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:21,684 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-28 10:04:21,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-28 10:04:21,684 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-28 10:04:21,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:21,685 INFO L225 Difference]: With dead ends: 91 [2018-09-28 10:04:21,685 INFO L226 Difference]: Without dead ends: 89 [2018-09-28 10:04:21,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-28 10:04:21,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-28 10:04:21,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-28 10:04:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-28 10:04:21,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-28 10:04:21,690 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-09-28 10:04:21,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:21,690 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-28 10:04:21,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-28 10:04:21,690 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-28 10:04:21,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-28 10:04:21,690 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:21,690 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-09-28 10:04:21,691 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:21,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:21,691 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-09-28 10:04:21,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:21,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:21,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:21,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:21,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:23,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:23,052 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 [2018-09-28 10:04:23,060 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:04:23,151 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-28 10:04:23,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:23,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:23,198 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:23,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-28 10:04:23,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-28 10:04:23,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-28 10:04:23,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-28 10:04:23,200 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-09-28 10:04:23,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:23,270 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-28 10:04:23,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-28 10:04:23,270 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-28 10:04:23,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:23,271 INFO L225 Difference]: With dead ends: 93 [2018-09-28 10:04:23,271 INFO L226 Difference]: Without dead ends: 91 [2018-09-28 10:04:23,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-28 10:04:23,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-28 10:04:23,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-28 10:04:23,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-28 10:04:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-28 10:04:23,275 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-09-28 10:04:23,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:23,276 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-28 10:04:23,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-28 10:04:23,276 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-28 10:04:23,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-28 10:04:23,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:23,276 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-09-28 10:04:23,276 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:23,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:23,277 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-09-28 10:04:23,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:23,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:23,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:23,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:23,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:24,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:24,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:24,218 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 [2018-09-28 10:04:24,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:04:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:24,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:24,337 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:24,338 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-28 10:04:24,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-28 10:04:24,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-28 10:04:24,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-28 10:04:24,339 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-09-28 10:04:24,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:24,424 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-28 10:04:24,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-28 10:04:24,425 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-28 10:04:24,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:24,426 INFO L225 Difference]: With dead ends: 95 [2018-09-28 10:04:24,426 INFO L226 Difference]: Without dead ends: 93 [2018-09-28 10:04:24,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-28 10:04:24,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-28 10:04:24,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-28 10:04:24,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-28 10:04:24,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-28 10:04:24,431 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-09-28 10:04:24,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:24,431 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-28 10:04:24,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-28 10:04:24,431 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-28 10:04:24,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-28 10:04:24,432 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:24,432 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-09-28 10:04:24,432 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:24,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:24,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-09-28 10:04:24,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:24,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:24,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:24,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:04:24,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:26,860 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:26,860 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 [2018-09-28 10:04:26,869 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:04:26,943 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:04:26,943 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:26,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:26,991 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:26,992 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-28 10:04:26,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-28 10:04:26,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-28 10:04:26,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-28 10:04:26,993 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-09-28 10:04:27,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:27,371 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-28 10:04:27,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-28 10:04:27,372 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-28 10:04:27,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:27,372 INFO L225 Difference]: With dead ends: 97 [2018-09-28 10:04:27,373 INFO L226 Difference]: Without dead ends: 95 [2018-09-28 10:04:27,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-28 10:04:27,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-28 10:04:27,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-28 10:04:27,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-28 10:04:27,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-28 10:04:27,377 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-09-28 10:04:27,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:27,377 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-28 10:04:27,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-28 10:04:27,378 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-28 10:04:27,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-28 10:04:27,378 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:27,378 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-09-28 10:04:27,378 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:27,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:27,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-09-28 10:04:27,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:27,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:27,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:27,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:27,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:28,440 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:28,441 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 [2018-09-28 10:04:28,449 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:04:28,568 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-28 10:04:28,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:28,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:28,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:28,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-28 10:04:28,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-28 10:04:28,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-28 10:04:28,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-28 10:04:28,613 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-09-28 10:04:28,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:28,686 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-28 10:04:28,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-28 10:04:28,687 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-28 10:04:28,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:28,688 INFO L225 Difference]: With dead ends: 99 [2018-09-28 10:04:28,688 INFO L226 Difference]: Without dead ends: 97 [2018-09-28 10:04:28,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-28 10:04:28,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-28 10:04:28,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-28 10:04:28,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-28 10:04:28,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-28 10:04:28,691 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-09-28 10:04:28,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:28,691 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-28 10:04:28,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-28 10:04:28,692 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-28 10:04:28,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-28 10:04:28,692 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:28,692 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-09-28 10:04:28,692 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:28,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:28,692 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-09-28 10:04:28,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:28,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:28,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:28,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:28,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:30,466 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:30,466 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 [2018-09-28 10:04:30,477 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:04:30,554 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:04:30,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:30,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:30,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:30,593 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-28 10:04:30,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-28 10:04:30,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-28 10:04:30,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-28 10:04:30,594 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-09-28 10:04:30,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:30,677 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-28 10:04:30,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-28 10:04:30,677 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-28 10:04:30,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:30,678 INFO L225 Difference]: With dead ends: 101 [2018-09-28 10:04:30,678 INFO L226 Difference]: Without dead ends: 99 [2018-09-28 10:04:30,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-28 10:04:30,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-28 10:04:30,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-28 10:04:30,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-28 10:04:30,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-28 10:04:30,683 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-09-28 10:04:30,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:30,683 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-28 10:04:30,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-28 10:04:30,683 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-28 10:04:30,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-28 10:04:30,684 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:30,684 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-09-28 10:04:30,684 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:30,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:30,684 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-09-28 10:04:30,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:30,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:30,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:30,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:30,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:31,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:31,620 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 [2018-09-28 10:04:31,627 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:04:31,732 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-28 10:04:31,732 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:31,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:31,788 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:31,788 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-28 10:04:31,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-28 10:04:31,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-28 10:04:31,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-28 10:04:31,789 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-09-28 10:04:32,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:32,827 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-28 10:04:32,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-28 10:04:32,828 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-28 10:04:32,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:32,829 INFO L225 Difference]: With dead ends: 103 [2018-09-28 10:04:32,829 INFO L226 Difference]: Without dead ends: 101 [2018-09-28 10:04:32,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-28 10:04:32,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-28 10:04:32,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-28 10:04:32,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-28 10:04:32,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-28 10:04:32,834 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-09-28 10:04:32,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:32,834 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-28 10:04:32,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-28 10:04:32,835 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-28 10:04:32,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-28 10:04:32,835 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:32,835 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-09-28 10:04:32,836 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:32,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:32,836 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-09-28 10:04:32,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:32,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:32,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:32,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:32,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:34,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:34,515 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 [2018-09-28 10:04:34,522 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:04:34,630 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-28 10:04:34,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:34,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:34,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:34,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:34,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-28 10:04:34,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-28 10:04:34,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-28 10:04:34,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-28 10:04:34,669 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-09-28 10:04:34,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:34,792 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-28 10:04:34,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-28 10:04:34,793 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-28 10:04:34,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:34,794 INFO L225 Difference]: With dead ends: 105 [2018-09-28 10:04:34,794 INFO L226 Difference]: Without dead ends: 103 [2018-09-28 10:04:34,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-28 10:04:34,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-28 10:04:34,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-28 10:04:34,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-28 10:04:34,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-28 10:04:34,798 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-09-28 10:04:34,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:34,798 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-28 10:04:34,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-28 10:04:34,798 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-28 10:04:34,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-28 10:04:34,799 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:34,799 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-09-28 10:04:34,799 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:34,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:34,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-09-28 10:04:34,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:34,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:34,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:34,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:34,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:34,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:35,888 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:35,888 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 [2018-09-28 10:04:35,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:04:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:35,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:36,015 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:36,015 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-28 10:04:36,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-28 10:04:36,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-28 10:04:36,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-28 10:04:36,016 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-09-28 10:04:36,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:36,132 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-28 10:04:36,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-28 10:04:36,132 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-28 10:04:36,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:36,133 INFO L225 Difference]: With dead ends: 107 [2018-09-28 10:04:36,134 INFO L226 Difference]: Without dead ends: 105 [2018-09-28 10:04:36,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-28 10:04:36,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-28 10:04:36,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-28 10:04:36,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-28 10:04:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-28 10:04:36,138 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-09-28 10:04:36,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:36,138 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-28 10:04:36,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-28 10:04:36,139 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-28 10:04:36,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-28 10:04:36,139 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:36,139 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-09-28 10:04:36,139 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:36,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:36,140 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-09-28 10:04:36,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:36,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:36,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:36,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:04:36,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:36,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:37,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:37,252 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 [2018-09-28 10:04:37,260 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:04:37,341 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:04:37,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:37,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:37,393 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:37,394 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-28 10:04:37,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-28 10:04:37,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-28 10:04:37,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-28 10:04:37,395 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-09-28 10:04:37,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:37,646 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-28 10:04:37,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-28 10:04:37,647 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-28 10:04:37,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:37,647 INFO L225 Difference]: With dead ends: 109 [2018-09-28 10:04:37,648 INFO L226 Difference]: Without dead ends: 107 [2018-09-28 10:04:37,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-28 10:04:37,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-28 10:04:37,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-28 10:04:37,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-28 10:04:37,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-28 10:04:37,652 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-09-28 10:04:37,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:37,653 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-28 10:04:37,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-28 10:04:37,653 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-28 10:04:37,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-28 10:04:37,653 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:37,653 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-09-28 10:04:37,654 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:37,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:37,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-09-28 10:04:37,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:37,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:37,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:37,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:37,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:38,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:38,905 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 [2018-09-28 10:04:38,912 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:04:39,029 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-28 10:04:39,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:39,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:39,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:39,087 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-28 10:04:39,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-28 10:04:39,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-28 10:04:39,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-28 10:04:39,088 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-09-28 10:04:39,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:39,372 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-28 10:04:39,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-28 10:04:39,373 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-28 10:04:39,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:39,373 INFO L225 Difference]: With dead ends: 111 [2018-09-28 10:04:39,374 INFO L226 Difference]: Without dead ends: 109 [2018-09-28 10:04:39,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-28 10:04:39,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-28 10:04:39,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-28 10:04:39,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-28 10:04:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-28 10:04:39,378 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-09-28 10:04:39,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:39,379 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-28 10:04:39,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-28 10:04:39,379 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-28 10:04:39,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-28 10:04:39,379 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:39,380 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-09-28 10:04:39,380 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:39,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:39,380 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-09-28 10:04:39,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:39,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:39,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:39,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:39,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:40,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:40,873 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:40,873 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 [2018-09-28 10:04:40,887 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:04:40,979 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:04:40,980 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:40,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:41,034 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:41,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-28 10:04:41,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-28 10:04:41,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-28 10:04:41,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-28 10:04:41,036 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-09-28 10:04:41,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:41,580 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-28 10:04:41,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-28 10:04:41,580 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-28 10:04:41,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:41,581 INFO L225 Difference]: With dead ends: 113 [2018-09-28 10:04:41,581 INFO L226 Difference]: Without dead ends: 111 [2018-09-28 10:04:41,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-28 10:04:41,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-28 10:04:41,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-28 10:04:41,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-28 10:04:41,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-28 10:04:41,585 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-09-28 10:04:41,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:41,585 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-28 10:04:41,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-28 10:04:41,586 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-28 10:04:41,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-28 10:04:41,586 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:41,586 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-09-28 10:04:41,587 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:41,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:41,587 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-09-28 10:04:41,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:41,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:41,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:41,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:41,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:43,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:43,090 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 [2018-09-28 10:04:43,106 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:04:43,298 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-28 10:04:43,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:43,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:43,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:43,352 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:43,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-28 10:04:43,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-28 10:04:43,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-28 10:04:43,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-28 10:04:43,354 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-09-28 10:04:43,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:43,872 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-28 10:04:43,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-28 10:04:43,872 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-28 10:04:43,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:43,874 INFO L225 Difference]: With dead ends: 115 [2018-09-28 10:04:43,874 INFO L226 Difference]: Without dead ends: 113 [2018-09-28 10:04:43,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-28 10:04:43,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-28 10:04:43,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-28 10:04:43,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-28 10:04:43,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-28 10:04:43,878 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-09-28 10:04:43,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:43,879 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-28 10:04:43,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-28 10:04:43,879 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-28 10:04:43,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-28 10:04:43,879 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:43,879 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-09-28 10:04:43,880 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:43,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:43,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-09-28 10:04:43,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:43,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:43,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:43,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:43,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:45,159 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:45,159 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 [2018-09-28 10:04:45,169 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:04:45,298 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-28 10:04:45,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:45,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:45,363 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:45,363 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-28 10:04:45,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-28 10:04:45,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-28 10:04:45,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-28 10:04:45,365 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-09-28 10:04:45,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:45,740 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-28 10:04:45,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-28 10:04:45,741 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-28 10:04:45,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:45,742 INFO L225 Difference]: With dead ends: 117 [2018-09-28 10:04:45,742 INFO L226 Difference]: Without dead ends: 115 [2018-09-28 10:04:45,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-28 10:04:45,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-28 10:04:45,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-28 10:04:45,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-28 10:04:45,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-28 10:04:45,746 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-09-28 10:04:45,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:45,747 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-28 10:04:45,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-28 10:04:45,747 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-28 10:04:45,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-28 10:04:45,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:45,748 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-09-28 10:04:45,748 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:45,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:45,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-09-28 10:04:45,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:45,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:45,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:45,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:45,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:47,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:47,209 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 [2018-09-28 10:04:47,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:04:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:47,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:47,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:47,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-28 10:04:47,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-28 10:04:47,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-28 10:04:47,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-28 10:04:47,372 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-09-28 10:04:48,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:48,088 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-28 10:04:48,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-28 10:04:48,089 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-28 10:04:48,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:48,089 INFO L225 Difference]: With dead ends: 119 [2018-09-28 10:04:48,090 INFO L226 Difference]: Without dead ends: 117 [2018-09-28 10:04:48,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-28 10:04:48,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-28 10:04:48,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-28 10:04:48,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-28 10:04:48,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-28 10:04:48,094 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-09-28 10:04:48,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:48,094 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-28 10:04:48,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-28 10:04:48,095 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-28 10:04:48,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-28 10:04:48,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:48,095 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-09-28 10:04:48,096 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:48,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:48,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-09-28 10:04:48,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:48,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:48,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:48,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:04:48,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:49,389 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:49,389 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 [2018-09-28 10:04:49,396 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:04:49,486 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:04:49,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:49,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:49,540 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:49,541 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-28 10:04:49,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-28 10:04:49,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-28 10:04:49,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-28 10:04:49,542 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-09-28 10:04:49,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:49,779 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-28 10:04:49,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-28 10:04:49,779 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-28 10:04:49,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:49,781 INFO L225 Difference]: With dead ends: 121 [2018-09-28 10:04:49,781 INFO L226 Difference]: Without dead ends: 119 [2018-09-28 10:04:49,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-28 10:04:49,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-28 10:04:49,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-28 10:04:49,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-28 10:04:49,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-28 10:04:49,784 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-09-28 10:04:49,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:49,784 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-28 10:04:49,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-28 10:04:49,785 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-28 10:04:49,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-28 10:04:49,785 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:49,785 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-09-28 10:04:49,785 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:49,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:49,785 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-09-28 10:04:49,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:49,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:49,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:49,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:49,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:51,113 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:51,113 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 [2018-09-28 10:04:51,121 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:04:51,313 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-28 10:04:51,313 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:51,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:51,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:51,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-28 10:04:51,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-28 10:04:51,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-28 10:04:51,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-28 10:04:51,376 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-09-28 10:04:51,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:51,603 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-28 10:04:51,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-28 10:04:51,604 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-28 10:04:51,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:51,605 INFO L225 Difference]: With dead ends: 123 [2018-09-28 10:04:51,605 INFO L226 Difference]: Without dead ends: 121 [2018-09-28 10:04:51,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-28 10:04:51,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-28 10:04:51,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-28 10:04:51,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-28 10:04:51,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-28 10:04:51,609 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-09-28 10:04:51,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:51,609 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-28 10:04:51,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-28 10:04:51,609 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-28 10:04:51,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-28 10:04:51,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:51,610 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-09-28 10:04:51,610 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:51,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:51,610 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-09-28 10:04:51,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:51,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:51,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:51,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:51,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:53,474 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:53,474 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 [2018-09-28 10:04:53,481 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:04:53,572 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:04:53,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:53,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:53,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:53,630 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:53,630 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-28 10:04:53,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-28 10:04:53,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-28 10:04:53,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-28 10:04:53,631 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-09-28 10:04:53,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:53,929 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-28 10:04:53,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-28 10:04:53,930 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-09-28 10:04:53,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:53,931 INFO L225 Difference]: With dead ends: 125 [2018-09-28 10:04:53,931 INFO L226 Difference]: Without dead ends: 123 [2018-09-28 10:04:53,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-28 10:04:53,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-28 10:04:53,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-28 10:04:53,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-28 10:04:53,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-28 10:04:53,936 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-09-28 10:04:53,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:53,937 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-28 10:04:53,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-28 10:04:53,937 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-28 10:04:53,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-28 10:04:53,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:53,938 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-09-28 10:04:53,938 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:53,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:53,939 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-09-28 10:04:53,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:53,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:53,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:53,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:53,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:55,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:55,420 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 [2018-09-28 10:04:55,427 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:04:55,564 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-28 10:04:55,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:55,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:55,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:55,624 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-28 10:04:55,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-28 10:04:55,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-28 10:04:55,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-28 10:04:55,625 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-09-28 10:04:55,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:55,858 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-28 10:04:55,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-28 10:04:55,858 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-09-28 10:04:55,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:55,859 INFO L225 Difference]: With dead ends: 127 [2018-09-28 10:04:55,859 INFO L226 Difference]: Without dead ends: 125 [2018-09-28 10:04:55,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-28 10:04:55,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-28 10:04:55,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-28 10:04:55,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-28 10:04:55,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-28 10:04:55,862 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-09-28 10:04:55,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:55,862 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-28 10:04:55,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-28 10:04:55,862 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-28 10:04:55,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-28 10:04:55,863 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:55,863 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-09-28 10:04:55,863 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:55,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:55,863 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-09-28 10:04:55,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:55,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:55,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:55,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:55,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:57,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:57,330 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 [2018-09-28 10:04:57,338 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:04:57,481 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-28 10:04:57,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:57,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:57,542 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:57,543 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-28 10:04:57,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-28 10:04:57,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-28 10:04:57,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-28 10:04:57,544 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-09-28 10:04:57,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:57,700 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-28 10:04:57,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-28 10:04:57,700 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-09-28 10:04:57,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:57,701 INFO L225 Difference]: With dead ends: 129 [2018-09-28 10:04:57,701 INFO L226 Difference]: Without dead ends: 127 [2018-09-28 10:04:57,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-28 10:04:57,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-28 10:04:57,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-28 10:04:57,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-28 10:04:57,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-28 10:04:57,705 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-09-28 10:04:57,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:57,706 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-28 10:04:57,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-28 10:04:57,706 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-28 10:04:57,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-28 10:04:57,706 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:57,707 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-09-28 10:04:57,707 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:57,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:57,707 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-09-28 10:04:57,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:57,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:57,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:57,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:57,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:59,647 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:59,647 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 [2018-09-28 10:04:59,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:04:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:59,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:59,807 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:59,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-28 10:04:59,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-28 10:04:59,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-28 10:04:59,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-28 10:04:59,808 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-09-28 10:04:59,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:59,954 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-28 10:04:59,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-28 10:04:59,954 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-09-28 10:04:59,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:59,955 INFO L225 Difference]: With dead ends: 131 [2018-09-28 10:04:59,955 INFO L226 Difference]: Without dead ends: 129 [2018-09-28 10:04:59,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-28 10:04:59,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-28 10:04:59,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-28 10:04:59,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-28 10:04:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-28 10:04:59,958 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-09-28 10:04:59,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:59,958 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-28 10:04:59,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-28 10:04:59,958 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-28 10:04:59,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-28 10:04:59,958 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:59,959 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-09-28 10:04:59,959 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:59,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:59,959 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-09-28 10:04:59,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:59,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:59,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:59,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:04:59,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:01,531 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:05:01,531 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 [2018-09-28 10:05:01,540 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:05:01,646 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:05:01,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:05:01,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:05:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:01,708 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:05:01,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-28 10:05:01,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-28 10:05:01,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-28 10:05:01,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-28 10:05:01,710 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-09-28 10:05:01,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:05:01,823 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-28 10:05:01,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-28 10:05:01,824 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-09-28 10:05:01,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:05:01,825 INFO L225 Difference]: With dead ends: 133 [2018-09-28 10:05:01,825 INFO L226 Difference]: Without dead ends: 131 [2018-09-28 10:05:01,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-28 10:05:01,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-28 10:05:01,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-28 10:05:01,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-28 10:05:01,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-28 10:05:01,830 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-09-28 10:05:01,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:05:01,830 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-28 10:05:01,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-28 10:05:01,830 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-28 10:05:01,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-28 10:05:01,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:05:01,830 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-09-28 10:05:01,831 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:05:01,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:05:01,831 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-09-28 10:05:01,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:05:01,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:05:01,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:01,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:05:01,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:03,807 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:05:03,807 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 [2018-09-28 10:05:03,817 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:05:03,973 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-28 10:05:03,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:05:03,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:05:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:04,019 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:05:04,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-28 10:05:04,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-28 10:05:04,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-28 10:05:04,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-28 10:05:04,021 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-09-28 10:05:04,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:05:04,170 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-28 10:05:04,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-28 10:05:04,170 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-09-28 10:05:04,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:05:04,171 INFO L225 Difference]: With dead ends: 135 [2018-09-28 10:05:04,171 INFO L226 Difference]: Without dead ends: 133 [2018-09-28 10:05:04,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-28 10:05:04,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-28 10:05:04,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-28 10:05:04,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-28 10:05:04,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-28 10:05:04,175 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-09-28 10:05:04,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:05:04,175 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-28 10:05:04,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-28 10:05:04,175 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-28 10:05:04,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-28 10:05:04,176 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:05:04,176 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-09-28 10:05:04,176 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:05:04,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:05:04,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-09-28 10:05:04,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:05:04,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:05:04,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:04,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:05:04,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:05,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:05,764 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:05:05,764 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 [2018-09-28 10:05:05,774 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:05:05,875 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:05:05,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:05:05,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:05:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:05,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:05:05,928 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-28 10:05:05,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-28 10:05:05,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-28 10:05:05,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-28 10:05:05,930 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-09-28 10:05:06,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:05:06,068 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-28 10:05:06,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-28 10:05:06,068 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-09-28 10:05:06,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:05:06,069 INFO L225 Difference]: With dead ends: 137 [2018-09-28 10:05:06,069 INFO L226 Difference]: Without dead ends: 135 [2018-09-28 10:05:06,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-28 10:05:06,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-28 10:05:06,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-28 10:05:06,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-28 10:05:06,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-28 10:05:06,073 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-09-28 10:05:06,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:05:06,073 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-28 10:05:06,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-28 10:05:06,073 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-28 10:05:06,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-28 10:05:06,074 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:05:06,074 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-09-28 10:05:06,074 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:05:06,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:05:06,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-09-28 10:05:06,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:05:06,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:05:06,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:06,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:05:06,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:07,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:05:07,733 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 [2018-09-28 10:05:07,740 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:05:07,896 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-28 10:05:07,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:05:07,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:05:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:07,960 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:05:07,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-28 10:05:07,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-28 10:05:07,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-28 10:05:07,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-28 10:05:07,962 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-09-28 10:05:08,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:05:08,980 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-28 10:05:08,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-28 10:05:08,980 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-09-28 10:05:08,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:05:08,981 INFO L225 Difference]: With dead ends: 139 [2018-09-28 10:05:08,982 INFO L226 Difference]: Without dead ends: 137 [2018-09-28 10:05:08,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-28 10:05:08,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-28 10:05:08,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-28 10:05:08,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-28 10:05:08,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-28 10:05:08,986 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-09-28 10:05:08,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:05:08,986 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-28 10:05:08,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-28 10:05:08,986 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-28 10:05:08,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-28 10:05:08,987 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:05:08,987 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-09-28 10:05:08,987 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:05:08,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:05:08,988 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-09-28 10:05:08,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:05:08,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:05:08,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:08,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:05:08,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:10,844 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:05:10,844 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 [2018-09-28 10:05:10,852 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:05:11,020 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-28 10:05:11,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:05:11,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:05:11,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:11,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:05:11,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-28 10:05:11,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-28 10:05:11,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-28 10:05:11,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-28 10:05:11,087 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-09-28 10:05:11,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:05:11,237 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-28 10:05:11,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-28 10:05:11,238 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-09-28 10:05:11,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:05:11,239 INFO L225 Difference]: With dead ends: 141 [2018-09-28 10:05:11,239 INFO L226 Difference]: Without dead ends: 139 [2018-09-28 10:05:11,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-28 10:05:11,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-28 10:05:11,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-28 10:05:11,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-28 10:05:11,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-28 10:05:11,243 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-09-28 10:05:11,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:05:11,243 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-28 10:05:11,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-28 10:05:11,244 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-28 10:05:11,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-28 10:05:11,244 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:05:11,244 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-09-28 10:05:11,244 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:05:11,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:05:11,245 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-09-28 10:05:11,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:05:11,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:05:11,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:11,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:05:11,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:12,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:05:12,998 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 [2018-09-28 10:05:13,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:05:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:13,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:05:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:13,198 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:05:13,198 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-28 10:05:13,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-28 10:05:13,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-28 10:05:13,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-28 10:05:13,199 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-09-28 10:05:13,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:05:13,313 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-28 10:05:13,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-28 10:05:13,314 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-09-28 10:05:13,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:05:13,315 INFO L225 Difference]: With dead ends: 143 [2018-09-28 10:05:13,315 INFO L226 Difference]: Without dead ends: 141 [2018-09-28 10:05:13,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-28 10:05:13,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-28 10:05:13,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-28 10:05:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-28 10:05:13,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-28 10:05:13,319 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-09-28 10:05:13,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:05:13,320 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-28 10:05:13,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-28 10:05:13,320 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-28 10:05:13,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-28 10:05:13,320 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:05:13,320 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-09-28 10:05:13,321 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:05:13,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:05:13,321 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-09-28 10:05:13,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:05:13,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:05:13,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:13,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:05:13,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:15,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:05:15,370 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 [2018-09-28 10:05:15,377 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:05:15,486 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:05:15,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:05:15,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:05:15,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:15,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:05:15,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-28 10:05:15,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-28 10:05:15,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-28 10:05:15,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-28 10:05:15,535 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-09-28 10:05:15,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:05:15,661 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-28 10:05:15,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-28 10:05:15,661 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-09-28 10:05:15,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:05:15,662 INFO L225 Difference]: With dead ends: 145 [2018-09-28 10:05:15,663 INFO L226 Difference]: Without dead ends: 143 [2018-09-28 10:05:15,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-28 10:05:15,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-28 10:05:15,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-28 10:05:15,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-28 10:05:15,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-28 10:05:15,666 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-09-28 10:05:15,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:05:15,666 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-28 10:05:15,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-28 10:05:15,667 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-28 10:05:15,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-28 10:05:15,667 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:05:15,667 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-09-28 10:05:15,668 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:05:15,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:05:15,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-09-28 10:05:15,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:05:15,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:05:15,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:15,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:05:15,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:17,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:05:17,484 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 [2018-09-28 10:05:17,490 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:05:17,676 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-28 10:05:17,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:05:17,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:05:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:17,754 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:05:17,754 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-28 10:05:17,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-28 10:05:17,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-28 10:05:17,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-28 10:05:17,756 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-09-28 10:05:18,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:05:18,126 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-28 10:05:18,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-28 10:05:18,127 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-09-28 10:05:18,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:05:18,127 INFO L225 Difference]: With dead ends: 147 [2018-09-28 10:05:18,127 INFO L226 Difference]: Without dead ends: 145 [2018-09-28 10:05:18,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-28 10:05:18,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-28 10:05:18,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-28 10:05:18,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-28 10:05:18,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-28 10:05:18,133 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-09-28 10:05:18,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:05:18,133 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-28 10:05:18,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-28 10:05:18,133 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-28 10:05:18,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-28 10:05:18,133 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:05:18,134 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-09-28 10:05:18,134 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:05:18,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:05:18,134 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-09-28 10:05:18,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:05:18,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:05:18,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:18,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:05:18,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:20,387 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:05:20,387 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:05:20,394 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:05:20,508 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:05:20,508 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:05:20,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:05:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:20,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:05:20,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-28 10:05:20,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-28 10:05:20,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-28 10:05:20,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-28 10:05:20,576 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-09-28 10:05:20,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:05:20,810 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-28 10:05:20,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-28 10:05:20,811 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-09-28 10:05:20,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:05:20,812 INFO L225 Difference]: With dead ends: 149 [2018-09-28 10:05:20,812 INFO L226 Difference]: Without dead ends: 147 [2018-09-28 10:05:20,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-28 10:05:20,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-28 10:05:20,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-28 10:05:20,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-28 10:05:20,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-28 10:05:20,817 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-09-28 10:05:20,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:05:20,817 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-28 10:05:20,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-28 10:05:20,817 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-28 10:05:20,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-28 10:05:20,818 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:05:20,818 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-09-28 10:05:20,818 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:05:20,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:05:20,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-09-28 10:05:20,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:05:20,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:05:20,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:20,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:05:20,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:22,776 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:05:22,776 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 [2018-09-28 10:05:22,782 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:05:22,965 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-28 10:05:22,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:05:22,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:05:23,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:23,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:05:23,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-28 10:05:23,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-28 10:05:23,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-28 10:05:23,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-28 10:05:23,050 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-09-28 10:05:23,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:05:23,229 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-28 10:05:23,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-28 10:05:23,230 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-09-28 10:05:23,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:05:23,231 INFO L225 Difference]: With dead ends: 151 [2018-09-28 10:05:23,231 INFO L226 Difference]: Without dead ends: 149 [2018-09-28 10:05:23,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-28 10:05:23,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-28 10:05:23,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-28 10:05:23,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-28 10:05:23,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-28 10:05:23,235 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-09-28 10:05:23,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:05:23,235 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-28 10:05:23,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-28 10:05:23,235 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-28 10:05:23,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-28 10:05:23,236 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:05:23,236 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-09-28 10:05:23,236 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:05:23,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:05:23,237 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-09-28 10:05:23,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:05:23,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:05:23,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:23,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:05:23,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:25,607 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:05:25,607 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 [2018-09-28 10:05:25,614 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:05:25,797 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-28 10:05:25,797 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:05:25,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:05:25,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:25,852 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:05:25,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-28 10:05:25,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-28 10:05:25,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-28 10:05:25,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-28 10:05:25,853 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-09-28 10:05:25,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:05:25,987 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-28 10:05:25,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-28 10:05:25,988 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-09-28 10:05:25,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:05:25,989 INFO L225 Difference]: With dead ends: 153 [2018-09-28 10:05:25,990 INFO L226 Difference]: Without dead ends: 151 [2018-09-28 10:05:25,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-28 10:05:25,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-28 10:05:25,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-28 10:05:25,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-28 10:05:25,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-28 10:05:25,994 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-09-28 10:05:25,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:05:25,995 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-28 10:05:25,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-28 10:05:25,995 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-28 10:05:25,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-28 10:05:25,996 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:05:25,996 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-09-28 10:05:25,996 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:05:25,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:05:25,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-09-28 10:05:25,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:05:25,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:05:25,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:25,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:05:25,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:28,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:05:28,056 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 [2018-09-28 10:05:28,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:05:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:28,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:05:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:28,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:05:28,242 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-28 10:05:28,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-28 10:05:28,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-28 10:05:28,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-28 10:05:28,243 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-09-28 10:05:28,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:05:28,447 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-28 10:05:28,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-28 10:05:28,447 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-09-28 10:05:28,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:05:28,448 INFO L225 Difference]: With dead ends: 155 [2018-09-28 10:05:28,448 INFO L226 Difference]: Without dead ends: 153 [2018-09-28 10:05:28,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-28 10:05:28,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-28 10:05:28,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-28 10:05:28,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-28 10:05:28,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-28 10:05:28,453 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-09-28 10:05:28,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:05:28,453 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-28 10:05:28,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-28 10:05:28,453 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-28 10:05:28,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-28 10:05:28,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:05:28,454 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-09-28 10:05:28,454 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:05:28,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:05:28,455 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-09-28 10:05:28,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:05:28,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:05:28,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:28,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:05:28,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:30,837 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:05:30,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:05:30,844 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:05:30,957 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:05:30,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:05:30,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:05:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:31,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:05:31,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-28 10:05:31,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-28 10:05:31,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-28 10:05:31,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-28 10:05:31,029 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-09-28 10:05:31,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:05:31,265 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-28 10:05:31,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-28 10:05:31,265 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-09-28 10:05:31,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:05:31,266 INFO L225 Difference]: With dead ends: 157 [2018-09-28 10:05:31,266 INFO L226 Difference]: Without dead ends: 155 [2018-09-28 10:05:31,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-28 10:05:31,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-28 10:05:31,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-28 10:05:31,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-28 10:05:31,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-28 10:05:31,269 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-09-28 10:05:31,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:05:31,269 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-28 10:05:31,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-28 10:05:31,269 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-28 10:05:31,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-28 10:05:31,270 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:05:31,270 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-09-28 10:05:31,270 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:05:31,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:05:31,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-09-28 10:05:31,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:05:31,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:05:31,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:31,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:05:31,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:33,437 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:05:33,437 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 [2018-09-28 10:05:33,443 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:05:33,642 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-28 10:05:33,642 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:05:33,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:05:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:33,697 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:05:33,697 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-28 10:05:33,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-28 10:05:33,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-28 10:05:33,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-28 10:05:33,699 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-09-28 10:05:33,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:05:33,950 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-28 10:05:33,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-28 10:05:33,950 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-09-28 10:05:33,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:05:33,951 INFO L225 Difference]: With dead ends: 159 [2018-09-28 10:05:33,951 INFO L226 Difference]: Without dead ends: 157 [2018-09-28 10:05:33,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-28 10:05:33,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-28 10:05:33,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-28 10:05:33,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-28 10:05:33,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-09-28 10:05:33,954 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-09-28 10:05:33,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:05:33,954 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-09-28 10:05:33,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-28 10:05:33,954 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-09-28 10:05:33,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-28 10:05:33,955 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:05:33,955 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-09-28 10:05:33,955 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:05:33,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:05:33,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-09-28 10:05:33,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:05:33,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:05:33,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:33,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:05:33,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:36,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:05:36,274 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 [2018-09-28 10:05:36,281 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:05:36,402 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:05:36,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:05:36,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:05:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:36,452 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:05:36,453 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-28 10:05:36,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-28 10:05:36,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-28 10:05:36,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-28 10:05:36,454 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-09-28 10:05:36,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:05:36,684 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-28 10:05:36,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-28 10:05:36,685 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-09-28 10:05:36,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:05:36,686 INFO L225 Difference]: With dead ends: 161 [2018-09-28 10:05:36,686 INFO L226 Difference]: Without dead ends: 159 [2018-09-28 10:05:36,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-28 10:05:36,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-28 10:05:36,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-28 10:05:36,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-28 10:05:36,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-28 10:05:36,689 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-09-28 10:05:36,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:05:36,689 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-28 10:05:36,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-28 10:05:36,689 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-28 10:05:36,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-28 10:05:36,690 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:05:36,690 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-09-28 10:05:36,690 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:05:36,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:05:36,690 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-09-28 10:05:36,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:05:36,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:05:36,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:36,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:05:36,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:39,333 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:05:39,333 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-28 10:05:39,342 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:05:39,542 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-28 10:05:39,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:05:39,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:05:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:39,594 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:05:39,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-28 10:05:39,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-28 10:05:39,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-28 10:05:39,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-28 10:05:39,596 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-09-28 10:05:40,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:05:40,131 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-28 10:05:40,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-28 10:05:40,131 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-09-28 10:05:40,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:05:40,132 INFO L225 Difference]: With dead ends: 163 [2018-09-28 10:05:40,132 INFO L226 Difference]: Without dead ends: 161 [2018-09-28 10:05:40,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-28 10:05:40,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-28 10:05:40,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-28 10:05:40,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-28 10:05:40,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-09-28 10:05:40,137 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-09-28 10:05:40,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:05:40,137 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-09-28 10:05:40,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-28 10:05:40,137 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-09-28 10:05:40,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-28 10:05:40,138 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:05:40,138 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-09-28 10:05:40,139 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:05:40,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:05:40,139 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-09-28 10:05:40,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:05:40,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:05:40,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:40,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:05:40,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:42,717 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:05:42,717 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 [2018-09-28 10:05:42,725 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:05:42,933 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-28 10:05:42,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:05:42,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:05:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:42,987 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:05:42,987 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-28 10:05:42,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-28 10:05:42,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-28 10:05:42,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-28 10:05:42,989 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-09-28 10:05:43,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:05:43,130 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-28 10:05:43,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-28 10:05:43,130 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-09-28 10:05:43,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:05:43,131 INFO L225 Difference]: With dead ends: 165 [2018-09-28 10:05:43,131 INFO L226 Difference]: Without dead ends: 163 [2018-09-28 10:05:43,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-28 10:05:43,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-28 10:05:43,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-28 10:05:43,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-28 10:05:43,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-28 10:05:43,135 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-09-28 10:05:43,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:05:43,136 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-28 10:05:43,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-28 10:05:43,136 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-28 10:05:43,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-28 10:05:43,137 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:05:43,137 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-09-28 10:05:43,137 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:05:43,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:05:43,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-09-28 10:05:43,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:05:43,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:05:43,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:43,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:05:43,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:45,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:05:45,788 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 [2018-09-28 10:05:45,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:05:45,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:45,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:05:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:45,975 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:05:45,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-28 10:05:45,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-28 10:05:45,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-28 10:05:45,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-28 10:05:45,977 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-09-28 10:05:46,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:05:46,225 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-28 10:05:46,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-28 10:05:46,225 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-09-28 10:05:46,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:05:46,226 INFO L225 Difference]: With dead ends: 167 [2018-09-28 10:05:46,226 INFO L226 Difference]: Without dead ends: 165 [2018-09-28 10:05:46,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-28 10:05:46,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-28 10:05:46,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-28 10:05:46,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-28 10:05:46,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-09-28 10:05:46,230 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-09-28 10:05:46,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:05:46,230 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-09-28 10:05:46,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-28 10:05:46,230 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-09-28 10:05:46,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-28 10:05:46,231 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:05:46,231 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-09-28 10:05:46,232 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:05:46,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:05:46,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-09-28 10:05:46,232 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:05:46,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:05:46,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:46,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:05:46,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:48,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:48,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:05:48,716 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 [2018-09-28 10:05:48,724 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:05:48,852 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:05:48,853 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:05:48,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:05:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:48,906 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:05:48,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-28 10:05:48,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-28 10:05:48,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-28 10:05:48,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-28 10:05:48,908 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-09-28 10:05:49,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:05:49,067 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-28 10:05:49,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-28 10:05:49,068 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-09-28 10:05:49,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:05:49,069 INFO L225 Difference]: With dead ends: 169 [2018-09-28 10:05:49,069 INFO L226 Difference]: Without dead ends: 167 [2018-09-28 10:05:49,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-28 10:05:49,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-28 10:05:49,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-28 10:05:49,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-28 10:05:49,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-09-28 10:05:49,072 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-09-28 10:05:49,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:05:49,072 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-09-28 10:05:49,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-28 10:05:49,072 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-09-28 10:05:49,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-28 10:05:49,073 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:05:49,073 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-09-28 10:05:49,073 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:05:49,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:05:49,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-09-28 10:05:49,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:05:49,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:05:49,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:49,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:05:49,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:51,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:05:51,845 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 [2018-09-28 10:05:51,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:05:52,077 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-28 10:05:52,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:05:52,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:05:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:52,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:05:52,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-28 10:05:52,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-28 10:05:52,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-28 10:05:52,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-28 10:05:52,132 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-09-28 10:05:52,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:05:52,325 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-09-28 10:05:52,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-28 10:05:52,325 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-09-28 10:05:52,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:05:52,327 INFO L225 Difference]: With dead ends: 171 [2018-09-28 10:05:52,327 INFO L226 Difference]: Without dead ends: 169 [2018-09-28 10:05:52,327 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-28 10:05:52,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-28 10:05:52,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-28 10:05:52,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-28 10:05:52,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-09-28 10:05:52,331 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-09-28 10:05:52,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:05:52,332 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-09-28 10:05:52,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-28 10:05:52,332 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-09-28 10:05:52,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-28 10:05:52,332 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:05:52,332 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-09-28 10:05:52,333 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:05:52,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:05:52,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-09-28 10:05:52,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:05:52,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:05:52,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:52,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:05:52,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:55,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:55,037 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:05:55,037 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 [2018-09-28 10:05:55,046 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:05:55,177 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:05:55,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:05:55,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:05:55,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:55,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:05:55,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-28 10:05:55,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-28 10:05:55,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-28 10:05:55,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-28 10:05:55,249 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-09-28 10:05:55,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:05:55,523 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-28 10:05:55,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-28 10:05:55,523 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-09-28 10:05:55,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:05:55,524 INFO L225 Difference]: With dead ends: 173 [2018-09-28 10:05:55,524 INFO L226 Difference]: Without dead ends: 171 [2018-09-28 10:05:55,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-28 10:05:55,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-28 10:05:55,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-28 10:05:55,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-28 10:05:55,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-09-28 10:05:55,527 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-09-28 10:05:55,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:05:55,527 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-09-28 10:05:55,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-28 10:05:55,527 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-09-28 10:05:55,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-28 10:05:55,528 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:05:55,528 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-09-28 10:05:55,528 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:05:55,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:05:55,528 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-09-28 10:05:55,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:05:55,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:05:55,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:55,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:05:55,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:05:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:58,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:05:58,234 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 [2018-09-28 10:05:58,241 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:05:58,469 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-28 10:05:58,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:05:58,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:05:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:05:58,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:05:58,524 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-28 10:05:58,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-28 10:05:58,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-28 10:05:58,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-28 10:05:58,526 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-09-28 10:05:58,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:05:58,814 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-09-28 10:05:58,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-28 10:05:58,814 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-09-28 10:05:58,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:05:58,815 INFO L225 Difference]: With dead ends: 175 [2018-09-28 10:05:58,815 INFO L226 Difference]: Without dead ends: 173 [2018-09-28 10:05:58,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-28 10:05:58,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-28 10:05:58,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-28 10:05:58,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-28 10:05:58,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-09-28 10:05:58,819 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-09-28 10:05:58,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:05:58,819 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-09-28 10:05:58,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-28 10:05:58,820 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-09-28 10:05:58,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-28 10:05:58,820 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:05:58,821 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-09-28 10:05:58,821 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:05:58,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:05:58,821 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-09-28 10:05:58,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:05:58,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:05:58,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:58,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:05:58,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:05:58,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:06:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:01,841 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:06:01,842 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 [2018-09-28 10:06:01,849 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:06:02,095 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-28 10:06:02,096 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:06:02,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:06:02,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:02,149 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:06:02,149 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-28 10:06:02,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-28 10:06:02,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-28 10:06:02,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-28 10:06:02,150 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-09-28 10:06:02,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:06:02,601 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-09-28 10:06:02,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-28 10:06:02,601 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-09-28 10:06:02,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:06:02,602 INFO L225 Difference]: With dead ends: 177 [2018-09-28 10:06:02,602 INFO L226 Difference]: Without dead ends: 175 [2018-09-28 10:06:02,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-28 10:06:02,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-28 10:06:02,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-28 10:06:02,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-28 10:06:02,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-09-28 10:06:02,607 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-09-28 10:06:02,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:06:02,607 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-09-28 10:06:02,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-28 10:06:02,608 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-09-28 10:06:02,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-28 10:06:02,610 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:06:02,610 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-09-28 10:06:02,610 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:06:02,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:06:02,610 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-09-28 10:06:02,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:06:02,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:06:02,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:02,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:06:02,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:06:05,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:05,685 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:06:05,685 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 [2018-09-28 10:06:05,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:06:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:06:05,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:06:05,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:05,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:06:05,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-28 10:06:05,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-28 10:06:05,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-28 10:06:05,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-28 10:06:05,901 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-09-28 10:06:06,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:06:06,180 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-09-28 10:06:06,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-28 10:06:06,181 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-09-28 10:06:06,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:06:06,181 INFO L225 Difference]: With dead ends: 179 [2018-09-28 10:06:06,182 INFO L226 Difference]: Without dead ends: 177 [2018-09-28 10:06:06,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-28 10:06:06,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-28 10:06:06,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-28 10:06:06,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-28 10:06:06,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-09-28 10:06:06,186 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-09-28 10:06:06,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:06:06,186 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-09-28 10:06:06,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-28 10:06:06,187 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-09-28 10:06:06,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-28 10:06:06,187 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:06:06,188 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-09-28 10:06:06,188 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:06:06,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:06:06,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-09-28 10:06:06,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:06:06,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:06:06,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:06,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:06:06,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:06,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:06:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:08,976 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:06:08,976 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:06:08,983 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:06:09,122 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:06:09,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:06:09,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:06:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:09,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:06:09,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-28 10:06:09,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-28 10:06:09,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-28 10:06:09,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-28 10:06:09,181 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-09-28 10:06:09,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:06:09,362 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-09-28 10:06:09,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-28 10:06:09,363 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-09-28 10:06:09,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:06:09,364 INFO L225 Difference]: With dead ends: 181 [2018-09-28 10:06:09,364 INFO L226 Difference]: Without dead ends: 179 [2018-09-28 10:06:09,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-28 10:06:09,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-28 10:06:09,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-28 10:06:09,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-28 10:06:09,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-09-28 10:06:09,368 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-09-28 10:06:09,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:06:09,368 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-09-28 10:06:09,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-28 10:06:09,368 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-09-28 10:06:09,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-28 10:06:09,369 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:06:09,369 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-09-28 10:06:09,369 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:06:09,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:06:09,370 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-09-28 10:06:09,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:06:09,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:06:09,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:09,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:06:09,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:06:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:12,558 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:06:12,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:06:12,566 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:06:12,814 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-28 10:06:12,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:06:12,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:06:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:12,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:06:12,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-28 10:06:12,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-28 10:06:12,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-28 10:06:12,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-28 10:06:12,887 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-09-28 10:06:13,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:06:13,165 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-09-28 10:06:13,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-28 10:06:13,165 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-09-28 10:06:13,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:06:13,166 INFO L225 Difference]: With dead ends: 183 [2018-09-28 10:06:13,166 INFO L226 Difference]: Without dead ends: 181 [2018-09-28 10:06:13,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-28 10:06:13,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-28 10:06:13,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-28 10:06:13,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-28 10:06:13,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-09-28 10:06:13,171 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-09-28 10:06:13,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:06:13,171 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-09-28 10:06:13,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-28 10:06:13,171 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-09-28 10:06:13,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-28 10:06:13,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:06:13,172 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-09-28 10:06:13,172 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:06:13,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:06:13,173 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-09-28 10:06:13,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:06:13,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:06:13,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:13,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:06:13,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:06:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:16,345 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:06:16,345 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:06:16,351 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:06:16,501 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:06:16,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:06:16,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:06:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:16,558 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:06:16,558 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-28 10:06:16,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-28 10:06:16,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-28 10:06:16,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-28 10:06:16,560 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-09-28 10:06:16,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:06:16,741 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-09-28 10:06:16,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-28 10:06:16,742 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-09-28 10:06:16,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:06:16,743 INFO L225 Difference]: With dead ends: 185 [2018-09-28 10:06:16,743 INFO L226 Difference]: Without dead ends: 183 [2018-09-28 10:06:16,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-28 10:06:16,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-28 10:06:16,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-28 10:06:16,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-28 10:06:16,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-09-28 10:06:16,747 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-09-28 10:06:16,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:06:16,747 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-09-28 10:06:16,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-28 10:06:16,747 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-09-28 10:06:16,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-28 10:06:16,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:06:16,748 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-09-28 10:06:16,748 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:06:16,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:06:16,748 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-09-28 10:06:16,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:06:16,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:06:16,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:16,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:06:16,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:06:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:19,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:06:19,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:06:19,712 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:06:19,959 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-09-28 10:06:19,960 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:06:19,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:06:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:20,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:06:20,018 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-28 10:06:20,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-28 10:06:20,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-28 10:06:20,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-28 10:06:20,019 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-09-28 10:06:20,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:06:20,362 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-09-28 10:06:20,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-28 10:06:20,362 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-09-28 10:06:20,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:06:20,363 INFO L225 Difference]: With dead ends: 187 [2018-09-28 10:06:20,363 INFO L226 Difference]: Without dead ends: 185 [2018-09-28 10:06:20,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-28 10:06:20,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-28 10:06:20,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-28 10:06:20,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-28 10:06:20,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-09-28 10:06:20,366 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-09-28 10:06:20,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:06:20,367 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-09-28 10:06:20,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-28 10:06:20,367 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-09-28 10:06:20,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-28 10:06:20,367 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:06:20,368 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-09-28 10:06:20,368 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:06:20,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:06:20,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-09-28 10:06:20,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:06:20,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:06:20,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:20,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:06:20,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:06:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:23,345 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:06:23,345 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:06:23,353 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:06:23,600 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-09-28 10:06:23,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:06:23,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:06:23,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:23,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:06:23,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-28 10:06:23,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-28 10:06:23,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-28 10:06:23,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-28 10:06:23,660 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-09-28 10:06:23,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:06:23,902 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-09-28 10:06:23,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-28 10:06:23,902 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-09-28 10:06:23,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:06:23,903 INFO L225 Difference]: With dead ends: 189 [2018-09-28 10:06:23,903 INFO L226 Difference]: Without dead ends: 187 [2018-09-28 10:06:23,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-28 10:06:23,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-28 10:06:23,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-28 10:06:23,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-28 10:06:23,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-09-28 10:06:23,908 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-09-28 10:06:23,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:06:23,908 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-09-28 10:06:23,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-28 10:06:23,908 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-09-28 10:06:23,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-28 10:06:23,909 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:06:23,909 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-09-28 10:06:23,909 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:06:23,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:06:23,910 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-09-28 10:06:23,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:06:23,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:06:23,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:23,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:06:23,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:06:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:27,327 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:06:27,328 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:06:27,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:06:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:06:27,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:06:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:27,537 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:06:27,537 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-28 10:06:27,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-28 10:06:27,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-28 10:06:27,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-28 10:06:27,539 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-09-28 10:06:27,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:06:27,735 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-09-28 10:06:27,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-28 10:06:27,735 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-09-28 10:06:27,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:06:27,737 INFO L225 Difference]: With dead ends: 191 [2018-09-28 10:06:27,737 INFO L226 Difference]: Without dead ends: 189 [2018-09-28 10:06:27,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-28 10:06:27,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-28 10:06:27,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-28 10:06:27,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-28 10:06:27,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-09-28 10:06:27,743 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-09-28 10:06:27,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:06:27,743 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-09-28 10:06:27,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-28 10:06:27,743 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-09-28 10:06:27,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-28 10:06:27,744 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:06:27,744 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-09-28 10:06:27,745 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:06:27,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:06:27,745 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-09-28 10:06:27,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:06:27,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:06:27,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:27,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:06:27,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:06:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:31,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:06:31,266 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:06:31,274 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:06:31,421 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:06:31,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:06:31,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:06:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:31,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:06:31,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-28 10:06:31,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-28 10:06:31,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-28 10:06:31,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-28 10:06:31,483 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-09-28 10:06:31,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:06:31,658 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-09-28 10:06:31,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-28 10:06:31,659 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-09-28 10:06:31,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:06:31,660 INFO L225 Difference]: With dead ends: 193 [2018-09-28 10:06:31,660 INFO L226 Difference]: Without dead ends: 191 [2018-09-28 10:06:31,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-28 10:06:31,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-28 10:06:31,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-28 10:06:31,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-28 10:06:31,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-09-28 10:06:31,663 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-09-28 10:06:31,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:06:31,663 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-09-28 10:06:31,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-28 10:06:31,664 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-09-28 10:06:31,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-28 10:06:31,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:06:31,664 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-09-28 10:06:31,665 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:06:31,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:06:31,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-09-28 10:06:31,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:06:31,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:06:31,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:31,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:06:31,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:06:35,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:35,972 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:06:35,972 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:06:35,979 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:06:36,246 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-09-28 10:06:36,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:06:36,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:06:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:36,306 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:06:36,306 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-28 10:06:36,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-28 10:06:36,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-28 10:06:36,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-28 10:06:36,308 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-09-28 10:06:36,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:06:36,505 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-09-28 10:06:36,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-28 10:06:36,505 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-09-28 10:06:36,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:06:36,507 INFO L225 Difference]: With dead ends: 195 [2018-09-28 10:06:36,507 INFO L226 Difference]: Without dead ends: 193 [2018-09-28 10:06:36,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-28 10:06:36,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-28 10:06:36,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-28 10:06:36,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-28 10:06:36,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-09-28 10:06:36,511 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-09-28 10:06:36,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:06:36,512 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-09-28 10:06:36,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-28 10:06:36,512 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-09-28 10:06:36,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-28 10:06:36,512 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:06:36,512 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-09-28 10:06:36,513 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:06:36,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:06:36,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-09-28 10:06:36,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:06:36,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:06:36,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:36,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:06:36,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:06:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:39,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:06:39,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:06:39,852 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:06:40,003 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:06:40,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:06:40,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:06:40,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:40,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:06:40,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-28 10:06:40,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-28 10:06:40,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-28 10:06:40,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-28 10:06:40,065 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-09-28 10:06:40,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:06:40,390 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-09-28 10:06:40,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-28 10:06:40,391 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-09-28 10:06:40,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:06:40,392 INFO L225 Difference]: With dead ends: 197 [2018-09-28 10:06:40,392 INFO L226 Difference]: Without dead ends: 195 [2018-09-28 10:06:40,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-28 10:06:40,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-28 10:06:40,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-28 10:06:40,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-28 10:06:40,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-09-28 10:06:40,395 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-09-28 10:06:40,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:06:40,396 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-09-28 10:06:40,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-28 10:06:40,396 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-09-28 10:06:40,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-28 10:06:40,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:06:40,397 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-09-28 10:06:40,397 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:06:40,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:06:40,397 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-09-28 10:06:40,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:06:40,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:06:40,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:40,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:06:40,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:06:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:43,897 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:06:43,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:06:43,906 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:06:44,180 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-09-28 10:06:44,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:06:44,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:06:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:44,260 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:06:44,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-28 10:06:44,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-28 10:06:44,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-28 10:06:44,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-28 10:06:44,262 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-09-28 10:06:44,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:06:44,593 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-09-28 10:06:44,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-28 10:06:44,594 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-09-28 10:06:44,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:06:44,595 INFO L225 Difference]: With dead ends: 199 [2018-09-28 10:06:44,595 INFO L226 Difference]: Without dead ends: 197 [2018-09-28 10:06:44,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-28 10:06:44,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-28 10:06:44,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-28 10:06:44,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-28 10:06:44,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-09-28 10:06:44,600 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-09-28 10:06:44,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:06:44,600 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-09-28 10:06:44,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-28 10:06:44,600 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-09-28 10:06:44,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-28 10:06:44,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:06:44,601 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-09-28 10:06:44,602 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:06:44,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:06:44,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-09-28 10:06:44,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:06:44,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:06:44,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:44,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:06:44,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:06:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:48,386 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:06:48,386 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:06:48,394 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:06:48,673 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-09-28 10:06:48,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:06:48,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:06:48,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:48,735 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:06:48,735 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-28 10:06:48,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-28 10:06:48,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-28 10:06:48,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-28 10:06:48,737 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-09-28 10:06:48,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:06:48,947 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-09-28 10:06:48,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-28 10:06:48,948 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-09-28 10:06:48,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:06:48,949 INFO L225 Difference]: With dead ends: 201 [2018-09-28 10:06:48,949 INFO L226 Difference]: Without dead ends: 199 [2018-09-28 10:06:48,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-28 10:06:48,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-28 10:06:48,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-28 10:06:48,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-28 10:06:48,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-09-28 10:06:48,952 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-09-28 10:06:48,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:06:48,953 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-09-28 10:06:48,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-28 10:06:48,953 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-09-28 10:06:48,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-28 10:06:48,953 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:06:48,954 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-09-28 10:06:48,954 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:06:48,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:06:48,954 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-09-28 10:06:48,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:06:48,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:06:48,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:48,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:06:48,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:06:52,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:52,718 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:06:52,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:06:52,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:06:52,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:06:52,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:06:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:52,969 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:06:52,969 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-28 10:06:52,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-28 10:06:52,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-28 10:06:52,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-28 10:06:52,971 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 100 states. [2018-09-28 10:06:53,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:06:53,318 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-09-28 10:06:53,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-28 10:06:53,318 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-09-28 10:06:53,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:06:53,319 INFO L225 Difference]: With dead ends: 203 [2018-09-28 10:06:53,319 INFO L226 Difference]: Without dead ends: 201 [2018-09-28 10:06:53,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-28 10:06:53,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-28 10:06:53,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-28 10:06:53,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-28 10:06:53,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-09-28 10:06:53,323 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2018-09-28 10:06:53,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:06:53,323 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-09-28 10:06:53,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-28 10:06:53,323 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-09-28 10:06:53,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-28 10:06:53,324 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:06:53,324 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1] [2018-09-28 10:06:53,324 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:06:53,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:06:53,324 INFO L82 PathProgramCache]: Analyzing trace with hash 925303419, now seen corresponding path program 98 times [2018-09-28 10:06:53,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:06:53,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:06:53,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:53,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:06:53,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:06:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:57,177 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:06:57,177 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:06:57,184 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:06:57,340 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:06:57,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:06:57,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:06:57,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:06:57,403 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:06:57,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-28 10:06:57,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-28 10:06:57,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-28 10:06:57,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-28 10:06:57,405 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 101 states. [2018-09-28 10:06:57,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:06:57,739 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-09-28 10:06:57,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-28 10:06:57,740 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 200 [2018-09-28 10:06:57,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:06:57,740 INFO L225 Difference]: With dead ends: 205 [2018-09-28 10:06:57,741 INFO L226 Difference]: Without dead ends: 203 [2018-09-28 10:06:57,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-28 10:06:57,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-28 10:06:57,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-28 10:06:57,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-28 10:06:57,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-09-28 10:06:57,745 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2018-09-28 10:06:57,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:06:57,745 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-09-28 10:06:57,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-28 10:06:57,745 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-09-28 10:06:57,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-28 10:06:57,746 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:06:57,746 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1] [2018-09-28 10:06:57,746 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:06:57,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:06:57,746 INFO L82 PathProgramCache]: Analyzing trace with hash 158407477, now seen corresponding path program 99 times [2018-09-28 10:06:57,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:06:57,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:06:57,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:57,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:06:57,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:06:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:07:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:07:01,701 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:07:01,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:07:01,707 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:07:02,008 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-09-28 10:07:02,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:07:02,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:07:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:07:02,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:07:02,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-28 10:07:02,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-28 10:07:02,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-28 10:07:02,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-28 10:07:02,074 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 102 states. [2018-09-28 10:07:02,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:07:02,344 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-09-28 10:07:02,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-28 10:07:02,344 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-09-28 10:07:02,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:07:02,345 INFO L225 Difference]: With dead ends: 207 [2018-09-28 10:07:02,345 INFO L226 Difference]: Without dead ends: 205 [2018-09-28 10:07:02,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-28 10:07:02,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-28 10:07:02,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-28 10:07:02,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-28 10:07:02,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2018-09-28 10:07:02,350 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2018-09-28 10:07:02,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:07:02,350 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2018-09-28 10:07:02,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-28 10:07:02,350 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2018-09-28 10:07:02,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-28 10:07:02,351 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:07:02,351 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1] [2018-09-28 10:07:02,351 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:07:02,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:07:02,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1905782127, now seen corresponding path program 100 times [2018-09-28 10:07:02,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:07:02,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:07:02,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:07:02,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:07:02,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:07:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:07:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:07:06,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:07:06,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:07:06,509 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:07:06,669 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:07:06,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:07:06,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:07:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:07:06,735 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:07:06,735 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-28 10:07:06,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-28 10:07:06,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-28 10:07:06,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-28 10:07:06,737 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 103 states. [2018-09-28 10:07:06,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:07:06,999 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-09-28 10:07:06,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-28 10:07:06,999 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 204 [2018-09-28 10:07:06,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:07:07,000 INFO L225 Difference]: With dead ends: 209 [2018-09-28 10:07:07,000 INFO L226 Difference]: Without dead ends: 207 [2018-09-28 10:07:07,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-28 10:07:07,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-28 10:07:07,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-28 10:07:07,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-28 10:07:07,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-09-28 10:07:07,005 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2018-09-28 10:07:07,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:07:07,005 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-09-28 10:07:07,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-28 10:07:07,006 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-09-28 10:07:07,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-28 10:07:07,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:07:07,007 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1] [2018-09-28 10:07:07,014 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:07:07,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:07:07,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1800608041, now seen corresponding path program 101 times [2018-09-28 10:07:07,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:07:07,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:07:07,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:07:07,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:07:07,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:07:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:07:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:07:10,854 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:07:10,854 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:07:10,862 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:07:11,310 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-09-28 10:07:11,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:07:11,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:07:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:07:11,400 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:07:11,401 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-28 10:07:11,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-28 10:07:11,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-28 10:07:11,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-28 10:07:11,402 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 104 states. [2018-09-28 10:07:11,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:07:11,678 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-09-28 10:07:11,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-28 10:07:11,678 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 206 [2018-09-28 10:07:11,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:07:11,679 INFO L225 Difference]: With dead ends: 211 [2018-09-28 10:07:11,679 INFO L226 Difference]: Without dead ends: 209 [2018-09-28 10:07:11,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-28 10:07:11,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-28 10:07:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-28 10:07:11,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-28 10:07:11,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-09-28 10:07:11,683 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2018-09-28 10:07:11,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:07:11,683 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-09-28 10:07:11,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-28 10:07:11,683 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-09-28 10:07:11,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-28 10:07:11,684 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:07:11,684 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1] [2018-09-28 10:07:11,684 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:07:11,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:07:11,685 INFO L82 PathProgramCache]: Analyzing trace with hash -487440797, now seen corresponding path program 102 times [2018-09-28 10:07:11,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:07:11,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:07:11,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:07:11,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:07:11,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:07:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:07:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:07:15,588 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:07:15,588 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:07:15,595 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:07:15,892 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-09-28 10:07:15,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:07:15,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:07:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:07:15,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:07:15,959 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-28 10:07:15,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-28 10:07:15,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-28 10:07:15,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-28 10:07:15,960 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 105 states. [2018-09-28 10:07:16,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:07:16,304 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-09-28 10:07:16,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-28 10:07:16,304 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 208 [2018-09-28 10:07:16,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:07:16,305 INFO L225 Difference]: With dead ends: 213 [2018-09-28 10:07:16,305 INFO L226 Difference]: Without dead ends: 211 [2018-09-28 10:07:16,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-28 10:07:16,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-28 10:07:16,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-28 10:07:16,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-28 10:07:16,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-09-28 10:07:16,309 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2018-09-28 10:07:16,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:07:16,309 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-09-28 10:07:16,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-28 10:07:16,309 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-09-28 10:07:16,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-28 10:07:16,310 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:07:16,311 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1] [2018-09-28 10:07:16,311 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:07:16,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:07:16,311 INFO L82 PathProgramCache]: Analyzing trace with hash -279118563, now seen corresponding path program 103 times [2018-09-28 10:07:16,311 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:07:16,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:07:16,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:07:16,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:07:16,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:07:16,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:07:20,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:07:20,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:07:20,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:07:20,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:07:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:07:20,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:07:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:07:20,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:07:20,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-28 10:07:20,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-28 10:07:20,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-28 10:07:20,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-28 10:07:20,629 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 106 states. [2018-09-28 10:07:21,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:07:21,111 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-09-28 10:07:21,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-28 10:07:21,112 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 210 [2018-09-28 10:07:21,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:07:21,112 INFO L225 Difference]: With dead ends: 215 [2018-09-28 10:07:21,112 INFO L226 Difference]: Without dead ends: 213 [2018-09-28 10:07:21,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-28 10:07:21,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-28 10:07:21,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-09-28 10:07:21,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-09-28 10:07:21,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-09-28 10:07:21,117 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2018-09-28 10:07:21,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:07:21,117 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-09-28 10:07:21,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-28 10:07:21,117 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-09-28 10:07:21,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-28 10:07:21,118 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:07:21,119 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1] [2018-09-28 10:07:21,119 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:07:21,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:07:21,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1944914601, now seen corresponding path program 104 times [2018-09-28 10:07:21,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:07:21,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:07:21,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:07:21,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:07:21,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:07:21,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:07:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:07:25,497 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:07:25,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:07:25,505 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:07:25,663 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:07:25,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:07:25,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:07:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:07:25,733 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:07:25,734 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-28 10:07:25,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-28 10:07:25,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-28 10:07:25,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-28 10:07:25,735 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 107 states. [2018-09-28 10:07:25,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:07:25,987 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-09-28 10:07:25,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-28 10:07:25,988 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 212 [2018-09-28 10:07:25,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:07:25,988 INFO L225 Difference]: With dead ends: 217 [2018-09-28 10:07:25,988 INFO L226 Difference]: Without dead ends: 215 [2018-09-28 10:07:25,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-28 10:07:25,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-28 10:07:25,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-28 10:07:25,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-28 10:07:25,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-09-28 10:07:25,992 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2018-09-28 10:07:25,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:07:25,992 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-09-28 10:07:25,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-28 10:07:25,992 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-09-28 10:07:25,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-28 10:07:25,993 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:07:25,993 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1] [2018-09-28 10:07:25,993 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:07:25,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:07:25,993 INFO L82 PathProgramCache]: Analyzing trace with hash -752105711, now seen corresponding path program 105 times [2018-09-28 10:07:25,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:07:25,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:07:25,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:07:25,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:07:25,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:07:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:07:30,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:07:30,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:07:30,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:07:30,489 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:07:30,835 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-09-28 10:07:30,836 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:07:30,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:07:30,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:07:30,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:07:30,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-28 10:07:30,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-28 10:07:30,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-28 10:07:30,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-28 10:07:30,910 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 108 states. [2018-09-28 10:07:31,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:07:31,318 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-09-28 10:07:31,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-28 10:07:31,319 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 214 [2018-09-28 10:07:31,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:07:31,319 INFO L225 Difference]: With dead ends: 219 [2018-09-28 10:07:31,319 INFO L226 Difference]: Without dead ends: 217 [2018-09-28 10:07:31,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-28 10:07:31,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-09-28 10:07:31,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-09-28 10:07:31,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-28 10:07:31,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2018-09-28 10:07:31,324 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 214 [2018-09-28 10:07:31,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:07:31,324 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2018-09-28 10:07:31,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-28 10:07:31,325 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2018-09-28 10:07:31,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-09-28 10:07:31,325 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:07:31,326 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 1, 1, 1] [2018-09-28 10:07:31,326 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:07:31,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:07:31,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1219030453, now seen corresponding path program 106 times [2018-09-28 10:07:31,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:07:31,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:07:31,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:07:31,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:07:31,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:07:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:07:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:07:35,789 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:07:35,789 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:07:35,798 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:07:35,968 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:07:35,969 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:07:35,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:07:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:07:36,038 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:07:36,039 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-28 10:07:36,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-28 10:07:36,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-28 10:07:36,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-28 10:07:36,041 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 109 states. [2018-09-28 10:07:36,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:07:36,415 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-09-28 10:07:36,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-28 10:07:36,416 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 216 [2018-09-28 10:07:36,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:07:36,416 INFO L225 Difference]: With dead ends: 221 [2018-09-28 10:07:36,417 INFO L226 Difference]: Without dead ends: 219 [2018-09-28 10:07:36,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-28 10:07:36,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-28 10:07:36,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-28 10:07:36,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-28 10:07:36,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-09-28 10:07:36,421 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 216 [2018-09-28 10:07:36,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:07:36,421 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-09-28 10:07:36,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-28 10:07:36,421 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-09-28 10:07:36,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-28 10:07:36,422 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:07:36,422 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 1, 1, 1] [2018-09-28 10:07:36,422 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:07:36,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:07:36,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1037858565, now seen corresponding path program 107 times [2018-09-28 10:07:36,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:07:36,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:07:36,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:07:36,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:07:36,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:07:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-28 10:07:39,050 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-28 10:07:39,055 WARN L206 ceAbstractionStarter]: Timeout [2018-09-28 10:07:39,056 INFO L202 PluginConnector]: Adding new model count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.09 10:07:39 BoogieIcfgContainer [2018-09-28 10:07:39,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-28 10:07:39,057 INFO L168 Benchmark]: Toolchain (without parser) took 232316.10 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 702.5 MB). Free memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: -172.6 MB). Peak memory consumption was 529.9 MB. Max. memory is 7.1 GB. [2018-09-28 10:07:39,062 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 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. [2018-09-28 10:07:39,062 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.78 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. [2018-09-28 10:07:39,063 INFO L168 Benchmark]: Boogie Preprocessor took 23.25 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. [2018-09-28 10:07:39,063 INFO L168 Benchmark]: RCFGBuilder took 289.93 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. [2018-09-28 10:07:39,063 INFO L168 Benchmark]: TraceAbstraction took 231954.97 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 702.5 MB). Free memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: -193.8 MB). Peak memory consumption was 508.8 MB. Max. memory is 7.1 GB. [2018-09-28 10:07:39,065 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 0.20 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 41.78 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 23.25 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 289.93 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 231954.97 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 702.5 MB). Free memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: -193.8 MB). Peak memory consumption was 508.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 42]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 42). Cancelled while BasicCegarLoop was analyzing trace of length 219 with TraceHistMax 108, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 78 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 231.8s OverallTime, 108 OverallIterations, 108 TraceHistogramMax, 22.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 428 SDtfs, 0 SDslu, 9381 SDs, 0 SdLazy, 9488 SolverSat, 177 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17545 GetRequests, 11767 SyntacticMatches, 0 SemanticMatches, 5778 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 175.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=219occurred in iteration=107, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 107 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.7s SsaConstructionTime, 16.3s SatisfiabilityAnalysisTime, 182.7s InterpolantComputationTime, 23536 NumberOfCodeBlocks, 23536 NumberOfCodeBlocksAsserted, 3040 NumberOfCheckSat, 23323 ConstructedInterpolants, 0 QuantifiedInterpolants, 10030801 SizeOfPredicates, 317 NumberOfNonLiveVariables, 69642 ConjunctsInSsa, 6409 ConjunctsInUnsatCore, 213 InterpolantComputations, 1 PerfectInterpolantSequences, 0/816624 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/count_by_nondet.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-28_10-07-39-077.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_nondet.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-28_10-07-39-077.csv Completed graceful shutdown