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/20170319-ConjunctivePathPrograms/count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:19:09,480 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:19:09,483 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:19:09,499 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:19:09,500 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:19:09,503 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:19:09,505 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:19:09,508 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:19:09,509 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:19:09,510 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:19:09,511 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 23:19:09,535 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 [2018-09-30 23:19:09,556 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:19:09,557 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:19:09,558 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:19:09,558 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:19:09,559 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:19:09,559 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:19:09,559 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:19:09,560 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:19:09,560 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:19:09,560 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:19:09,560 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:19:09,560 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:19:09,561 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:19:09,561 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:19:09,561 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:19:09,561 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:19:09,563 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:19:09,563 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:19:09,563 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:19:09,563 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:19:09,563 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:19:09,564 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:19:09,564 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:19:09,564 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:19:09,564 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:19:09,564 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:19:09,565 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:19:09,565 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:19:09,565 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:19:09,566 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:19:09,628 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:19:09,642 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:19:09,648 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:19:09,649 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:19:09,650 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:19:09,650 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-09-30 23:19:09,651 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl' [2018-09-30 23:19:09,696 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:19:09,699 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:19:09,699 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:19:09,700 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:19:09,700 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:19:09,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:19:09" (1/1) ... [2018-09-30 23:19:09,734 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:19:09" (1/1) ... [2018-09-30 23:19:09,741 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:19:09,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:19:09,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:19:09,742 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:19:09,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:19:09" (1/1) ... [2018-09-30 23:19:09,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:19:09" (1/1) ... [2018-09-30 23:19:09,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:19:09" (1/1) ... [2018-09-30 23:19:09,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:19:09" (1/1) ... [2018-09-30 23:19:09,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:19:09" (1/1) ... [2018-09-30 23:19:09,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:19:09" (1/1) ... [2018-09-30 23:19:09,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:19:09" (1/1) ... [2018-09-30 23:19:09,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:19:09,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:19:09,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:19:09,766 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:19:09,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:19:09" (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 [2018-09-30 23:19:09,842 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-30 23:19:09,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 23:19:09,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 23:19:10,072 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 23:19:10,073 INFO L202 PluginConnector]: Adding new model count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:19:10 BoogieIcfgContainer [2018-09-30 23:19:10,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:19:10,074 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:19:10,074 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:19:10,078 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:19:10,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:19:09" (1/2) ... [2018-09-30 23:19:10,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@519dd492 and model type count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:19:10, skipping insertion in model container [2018-09-30 23:19:10,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:19:10" (2/2) ... [2018-09-30 23:19:10,081 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-09-30 23:19:10,091 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:19:10,101 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:19:10,148 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:19:10,149 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:19:10,149 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:19:10,150 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:19:10,150 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:19:10,150 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:19:10,150 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:19:10,153 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:19:10,153 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:19:10,170 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 23:19:10,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 23:19:10,189 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:10,190 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 23:19:10,191 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:10,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:10,203 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-09-30 23:19:10,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:10,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:10,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:10,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:10,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:10,354 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:19:10,354 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 23:19:10,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:19:10,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:19:10,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:19:10,375 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 23:19:10,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:10,427 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-30 23:19:10,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:19:10,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 23:19:10,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:10,439 INFO L225 Difference]: With dead ends: 9 [2018-09-30 23:19:10,440 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 23:19:10,443 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 [2018-09-30 23:19:10,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 23:19:10,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 23:19:10,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 23:19:10,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 23:19:10,487 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 23:19:10,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:10,487 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 23:19:10,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:19:10,488 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 23:19:10,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 23:19:10,488 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:10,488 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 23:19:10,489 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:10,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:10,489 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-09-30 23:19:10,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:10,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:10,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:10,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:10,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:10,619 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:10,619 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) [2018-09-30 23:19:10,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:10,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:10,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:10,734 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:10,734 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 23:19:10,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:19:10,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:19:10,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:19:10,736 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-30 23:19:10,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:10,820 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-30 23:19:10,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:19:10,821 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-30 23:19:10,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:10,822 INFO L225 Difference]: With dead ends: 8 [2018-09-30 23:19:10,822 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 23:19:10,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:19:10,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 23:19:10,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 23:19:10,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 23:19:10,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 23:19:10,826 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 23:19:10,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:10,826 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 23:19:10,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:19:10,826 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 23:19:10,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 23:19:10,827 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:10,827 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-30 23:19:10,828 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:10,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:10,828 INFO L82 PathProgramCache]: Analyzing trace with hash 28783137, now seen corresponding path program 2 times [2018-09-30 23:19:10,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:10,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:10,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:10,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:10,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:11,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:11,090 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:19:11,106 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:19:11,159 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:19:11,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:11,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:11,202 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:11,202 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 23:19:11,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:19:11,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:19:11,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:19:11,204 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-30 23:19:11,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:11,256 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 23:19:11,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:19:11,257 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-30 23:19:11,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:11,258 INFO L225 Difference]: With dead ends: 9 [2018-09-30 23:19:11,258 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 23:19:11,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:19:11,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 23:19:11,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 23:19:11,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 23:19:11,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 23:19:11,261 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 23:19:11,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:11,262 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 23:19:11,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:19:11,262 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 23:19:11,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 23:19:11,263 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:11,263 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-30 23:19:11,263 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:11,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:11,264 INFO L82 PathProgramCache]: Analyzing trace with hash 892275272, now seen corresponding path program 3 times [2018-09-30 23:19:11,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:11,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:11,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:11,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:11,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:11,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:11,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:11,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:11,425 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:19:11,475 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 23:19:11,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:11,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:11,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:11,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 23:19:11,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:19:11,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:19:11,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:19:11,505 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-30 23:19:11,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:11,567 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 23:19:11,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:19:11,568 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-30 23:19:11,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:11,568 INFO L225 Difference]: With dead ends: 10 [2018-09-30 23:19:11,569 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 23:19:11,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:19:11,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 23:19:11,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 23:19:11,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 23:19:11,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 23:19:11,572 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-30 23:19:11,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:11,573 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 23:19:11,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:19:11,573 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 23:19:11,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 23:19:11,573 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:11,573 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-30 23:19:11,574 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:11,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:11,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1890727681, now seen corresponding path program 4 times [2018-09-30 23:19:11,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:11,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:11,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:11,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:11,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:11,912 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:11,912 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 [2018-09-30 23:19:11,921 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:19:11,943 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:19:11,944 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:11,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:11,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:11,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:19:11,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:19:11,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:19:11,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:19:11,975 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-30 23:19:12,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:12,001 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 23:19:12,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:19:12,002 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-30 23:19:12,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:12,003 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:19:12,003 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 23:19:12,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:19:12,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 23:19:12,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 23:19:12,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 23:19:12,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 23:19:12,008 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-30 23:19:12,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:12,008 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 23:19:12,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:19:12,008 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 23:19:12,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:19:12,009 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:12,009 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-30 23:19:12,009 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:12,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:12,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1516986008, now seen corresponding path program 5 times [2018-09-30 23:19:12,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:12,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:12,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:12,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:12,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:12,302 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:12,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:12,303 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 [2018-09-30 23:19:12,323 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:19:12,358 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 23:19:12,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:12,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:12,389 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:12,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:19:12,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:19:12,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:19:12,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:19:12,390 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-30 23:19:12,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:12,426 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 23:19:12,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:19:12,427 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-30 23:19:12,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:12,428 INFO L225 Difference]: With dead ends: 12 [2018-09-30 23:19:12,428 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 23:19:12,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:19:12,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 23:19:12,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 23:19:12,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 23:19:12,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 23:19:12,432 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-30 23:19:12,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:12,433 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 23:19:12,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:19:12,433 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 23:19:12,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 23:19:12,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:12,434 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-30 23:19:12,434 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:12,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:12,434 INFO L82 PathProgramCache]: Analyzing trace with hash 218072033, now seen corresponding path program 6 times [2018-09-30 23:19:12,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:12,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:12,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:12,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:12,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:12,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:12,577 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 [2018-09-30 23:19:12,591 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:19:12,649 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 23:19:12,649 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:12,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:12,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:12,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:19:12,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:19:12,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:19:12,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:19:12,692 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-30 23:19:12,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:12,789 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 23:19:12,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:19:12,791 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-30 23:19:12,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:12,791 INFO L225 Difference]: With dead ends: 13 [2018-09-30 23:19:12,791 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 23:19:12,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:19:12,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 23:19:12,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 23:19:12,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 23:19:12,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 23:19:12,795 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-30 23:19:12,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:12,795 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 23:19:12,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:19:12,796 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 23:19:12,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:19:12,796 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:12,796 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-30 23:19:12,796 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:12,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:12,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1829703544, now seen corresponding path program 7 times [2018-09-30 23:19:12,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:12,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:12,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:12,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:12,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:13,239 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:13,240 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 [2018-09-30 23:19:13,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:13,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:13,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:13,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:19:13,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:19:13,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:19:13,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:19:13,303 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-30 23:19:13,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:13,334 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 23:19:13,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:19:13,334 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-30 23:19:13,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:13,335 INFO L225 Difference]: With dead ends: 14 [2018-09-30 23:19:13,335 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 23:19:13,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:19:13,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 23:19:13,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 23:19:13,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 23:19:13,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 23:19:13,340 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-30 23:19:13,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:13,341 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 23:19:13,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:19:13,341 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 23:19:13,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:19:13,341 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:13,342 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-30 23:19:13,342 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:13,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:13,342 INFO L82 PathProgramCache]: Analyzing trace with hash -886236991, now seen corresponding path program 8 times [2018-09-30 23:19:13,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:13,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:13,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:13,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:13,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:13,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:13,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:19:13,529 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:19:13,556 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:19:13,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:13,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:13,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:13,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:19:13,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:19:13,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:19:13,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:19:13,591 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-30 23:19:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:13,635 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 23:19:13,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:19:13,638 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-30 23:19:13,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:13,639 INFO L225 Difference]: With dead ends: 15 [2018-09-30 23:19:13,639 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 23:19:13,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:19:13,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 23:19:13,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 23:19:13,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 23:19:13,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 23:19:13,643 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-30 23:19:13,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:13,643 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 23:19:13,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:19:13,643 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 23:19:13,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 23:19:13,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:13,644 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-30 23:19:13,645 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:13,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:13,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1703544920, now seen corresponding path program 9 times [2018-09-30 23:19:13,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:13,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:13,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:13,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:13,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:13,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:13,812 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 [2018-09-30 23:19:13,826 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:19:13,912 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 23:19:13,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:13,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:13,944 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:13,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 23:19:13,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:19:13,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:19:13,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:19:13,946 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-30 23:19:14,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:14,015 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 23:19:14,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:19:14,016 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-30 23:19:14,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:14,016 INFO L225 Difference]: With dead ends: 16 [2018-09-30 23:19:14,016 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 23:19:14,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:19:14,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 23:19:14,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 23:19:14,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 23:19:14,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 23:19:14,020 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-30 23:19:14,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:14,021 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 23:19:14,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:19:14,021 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 23:19:14,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:19:14,022 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:14,022 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-30 23:19:14,022 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:14,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:14,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1270286943, now seen corresponding path program 10 times [2018-09-30 23:19:14,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:14,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:14,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:14,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:14,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:14,289 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:14,290 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 [2018-09-30 23:19:14,298 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:19:14,342 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:19:14,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:14,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:14,379 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:14,379 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 23:19:14,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:19:14,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:19:14,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:19:14,381 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-30 23:19:14,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:14,419 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 23:19:14,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:19:14,419 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-30 23:19:14,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:14,420 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:19:14,420 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 23:19:14,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:19:14,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 23:19:14,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 23:19:14,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 23:19:14,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 23:19:14,424 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-30 23:19:14,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:14,425 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 23:19:14,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:19:14,425 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 23:19:14,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:19:14,426 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:14,426 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-30 23:19:14,426 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:14,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:14,427 INFO L82 PathProgramCache]: Analyzing trace with hash -724191544, now seen corresponding path program 11 times [2018-09-30 23:19:14,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:14,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:14,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:14,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:14,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:14,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:14,863 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 [2018-09-30 23:19:14,870 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:19:14,895 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 23:19:14,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:14,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:14,929 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:14,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 23:19:14,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:19:14,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:19:14,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:19:14,930 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-30 23:19:14,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:14,972 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 23:19:14,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:19:14,972 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 23:19:14,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:14,973 INFO L225 Difference]: With dead ends: 18 [2018-09-30 23:19:14,973 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 23:19:14,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:19:14,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 23:19:14,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 23:19:14,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 23:19:14,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 23:19:14,977 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-30 23:19:14,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:14,977 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 23:19:14,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:19:14,977 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 23:19:14,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:19:14,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:14,978 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-30 23:19:14,978 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:14,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:14,979 INFO L82 PathProgramCache]: Analyzing trace with hash -975103359, now seen corresponding path program 12 times [2018-09-30 23:19:14,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:14,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:14,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:14,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:14,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:15,211 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:15,211 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 [2018-09-30 23:19:15,220 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:19:15,250 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:19:15,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:15,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:15,289 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:15,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 23:19:15,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:19:15,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:19:15,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:19:15,291 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-30 23:19:15,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:15,331 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 23:19:15,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:19:15,333 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-30 23:19:15,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:15,334 INFO L225 Difference]: With dead ends: 19 [2018-09-30 23:19:15,334 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 23:19:15,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:19:15,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 23:19:15,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 23:19:15,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 23:19:15,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 23:19:15,338 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-30 23:19:15,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:15,339 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 23:19:15,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:19:15,339 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 23:19:15,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 23:19:15,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:15,340 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-30 23:19:15,340 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:15,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:15,340 INFO L82 PathProgramCache]: Analyzing trace with hash -163435032, now seen corresponding path program 13 times [2018-09-30 23:19:15,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:15,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:15,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:15,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:15,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:15,632 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:15,633 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:15,633 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 [2018-09-30 23:19:15,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:15,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:15,705 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:15,705 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 23:19:15,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:19:15,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:19:15,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:19:15,707 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-30 23:19:15,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:15,980 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 23:19:15,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:19:15,981 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-30 23:19:15,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:15,981 INFO L225 Difference]: With dead ends: 20 [2018-09-30 23:19:15,982 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 23:19:15,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:19:15,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 23:19:15,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 23:19:15,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 23:19:15,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 23:19:15,988 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-30 23:19:15,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:15,988 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 23:19:15,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:19:15,988 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 23:19:15,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:19:15,989 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:15,989 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-30 23:19:15,989 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:15,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:15,990 INFO L82 PathProgramCache]: Analyzing trace with hash -771520671, now seen corresponding path program 14 times [2018-09-30 23:19:15,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:15,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:15,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:15,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:15,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:16,340 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:16,340 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 [2018-09-30 23:19:16,369 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:19:16,411 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:19:16,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:16,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:16,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:16,446 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 23:19:16,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:19:16,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:19:16,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:19:16,447 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-30 23:19:16,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:16,521 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 23:19:16,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:19:16,522 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-30 23:19:16,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:16,522 INFO L225 Difference]: With dead ends: 21 [2018-09-30 23:19:16,522 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 23:19:16,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:19:16,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 23:19:16,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 23:19:16,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 23:19:16,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 23:19:16,527 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-30 23:19:16,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:16,527 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 23:19:16,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:19:16,527 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 23:19:16,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:19:16,528 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:16,528 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-30 23:19:16,528 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:16,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:16,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1852661000, now seen corresponding path program 15 times [2018-09-30 23:19:16,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:16,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:16,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:16,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:16,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:16,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:16,765 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:16,765 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 [2018-09-30 23:19:16,773 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:19:16,857 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 23:19:16,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:16,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:16,870 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:16,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:16,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 23:19:16,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:19:16,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:19:16,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:19:16,901 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-30 23:19:16,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:16,952 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 23:19:16,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:19:16,952 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-30 23:19:16,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:16,953 INFO L225 Difference]: With dead ends: 22 [2018-09-30 23:19:16,953 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 23:19:16,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:19:16,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 23:19:16,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 23:19:16,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:19:16,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 23:19:16,958 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-30 23:19:16,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:16,958 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 23:19:16,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:19:16,958 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 23:19:16,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:19:16,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:16,959 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-30 23:19:16,959 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:16,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:16,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1597914177, now seen corresponding path program 16 times [2018-09-30 23:19:16,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:16,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:16,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:16,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:16,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:17,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:17,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:19:17,521 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:19:17,554 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:19:17,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:17,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:17,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:17,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 23:19:17,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:19:17,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:19:17,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:19:17,590 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-30 23:19:17,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:17,631 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 23:19:17,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:19:17,633 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-30 23:19:17,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:17,633 INFO L225 Difference]: With dead ends: 23 [2018-09-30 23:19:17,633 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 23:19:17,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:19:17,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 23:19:17,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 23:19:17,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 23:19:17,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 23:19:17,637 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-30 23:19:17,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:17,637 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 23:19:17,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:19:17,637 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 23:19:17,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 23:19:17,638 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:17,638 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-30 23:19:17,638 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:17,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:17,639 INFO L82 PathProgramCache]: Analyzing trace with hash -2004270040, now seen corresponding path program 17 times [2018-09-30 23:19:17,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:17,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:17,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:17,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:17,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:18,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:18,112 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 [2018-09-30 23:19:18,119 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:19:18,191 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 23:19:18,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:18,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:18,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:18,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 23:19:18,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:19:18,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:19:18,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:19:18,228 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-30 23:19:18,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:18,340 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 23:19:18,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:19:18,341 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-30 23:19:18,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:18,342 INFO L225 Difference]: With dead ends: 24 [2018-09-30 23:19:18,342 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 23:19:18,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:19:18,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 23:19:18,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 23:19:18,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:19:18,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 23:19:18,346 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-30 23:19:18,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:18,347 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 23:19:18,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:19:18,347 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 23:19:18,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:19:18,347 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:18,348 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-30 23:19:18,348 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:18,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:18,348 INFO L82 PathProgramCache]: Analyzing trace with hash -2002831071, now seen corresponding path program 18 times [2018-09-30 23:19:18,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:18,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:18,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:18,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:18,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:18,658 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:18,658 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 [2018-09-30 23:19:18,669 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:19:18,827 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 23:19:18,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:18,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:18,840 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:18,875 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:18,875 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 23:19:18,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:19:18,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:19:18,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:19:18,876 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-30 23:19:19,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:19,030 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 23:19:19,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:19:19,031 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-30 23:19:19,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:19,032 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:19:19,032 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:19:19,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:19:19,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:19:19,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 23:19:19,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 23:19:19,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 23:19:19,036 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-30 23:19:19,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:19,037 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 23:19:19,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:19:19,037 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 23:19:19,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:19:19,038 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:19,038 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-30 23:19:19,038 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:19,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:19,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1958223032, now seen corresponding path program 19 times [2018-09-30 23:19:19,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:19,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:19,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:19,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:19,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:19,320 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:19,320 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 [2018-09-30 23:19:19,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:19,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:19,406 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:19,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 23:19:19,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:19:19,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:19:19,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:19:19,408 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-30 23:19:19,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:19,523 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 23:19:19,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:19:19,524 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-30 23:19:19,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:19,525 INFO L225 Difference]: With dead ends: 26 [2018-09-30 23:19:19,525 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 23:19:19,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:19:19,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 23:19:19,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 23:19:19,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:19:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 23:19:19,529 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-30 23:19:19,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:19,529 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 23:19:19,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:19:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 23:19:19,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 23:19:19,530 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:19,530 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-30 23:19:19,531 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:19,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:19,531 INFO L82 PathProgramCache]: Analyzing trace with hash -575373823, now seen corresponding path program 20 times [2018-09-30 23:19:19,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:19,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:19,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:19,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:19,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:19,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:19,918 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 [2018-09-30 23:19:19,926 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:19:19,958 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:19:19,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:19,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:20,003 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:20,003 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 23:19:20,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:19:20,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:19:20,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:19:20,005 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-30 23:19:20,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:20,057 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 23:19:20,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:19:20,057 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-30 23:19:20,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:20,058 INFO L225 Difference]: With dead ends: 27 [2018-09-30 23:19:20,058 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 23:19:20,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:19:20,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 23:19:20,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 23:19:20,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 23:19:20,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 23:19:20,062 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-30 23:19:20,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:20,062 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 23:19:20,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:19:20,062 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 23:19:20,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 23:19:20,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:20,063 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-30 23:19:20,063 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:20,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:20,064 INFO L82 PathProgramCache]: Analyzing trace with hash -656721304, now seen corresponding path program 21 times [2018-09-30 23:19:20,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:20,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:20,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:20,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:20,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:20,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:20,483 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:20,483 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 [2018-09-30 23:19:20,491 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:19:20,534 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 23:19:20,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:20,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:20,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:20,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 23:19:20,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:19:20,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:19:20,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:19:20,570 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-30 23:19:20,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:20,665 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 23:19:20,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:19:20,669 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-30 23:19:20,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:20,669 INFO L225 Difference]: With dead ends: 28 [2018-09-30 23:19:20,669 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 23:19:20,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:19:20,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 23:19:20,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 23:19:20,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:19:20,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 23:19:20,674 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-30 23:19:20,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:20,674 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 23:19:20,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:19:20,674 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 23:19:20,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 23:19:20,675 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:20,675 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-30 23:19:20,675 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:20,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:20,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1116474081, now seen corresponding path program 22 times [2018-09-30 23:19:20,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:20,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:20,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:20,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:20,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:21,164 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:21,164 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 [2018-09-30 23:19:21,173 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:19:21,217 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:19:21,217 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:21,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:21,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:21,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 23:19:21,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 23:19:21,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 23:19:21,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:19:21,264 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-30 23:19:21,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:21,387 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 23:19:21,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:19:21,388 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-30 23:19:21,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:21,389 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:19:21,389 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:19:21,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:19:21,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:19:21,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 23:19:21,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 23:19:21,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 23:19:21,394 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-30 23:19:21,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:21,395 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 23:19:21,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 23:19:21,395 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 23:19:21,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:19:21,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:21,396 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-30 23:19:21,396 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:21,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:21,397 INFO L82 PathProgramCache]: Analyzing trace with hash 250956168, now seen corresponding path program 23 times [2018-09-30 23:19:21,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:21,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:21,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:21,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:21,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:21,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:21,884 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 [2018-09-30 23:19:21,898 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:19:21,950 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 23:19:21,950 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:21,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:21,991 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:21,992 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 23:19:21,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:19:21,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:19:21,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:19:21,993 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-30 23:19:22,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:22,063 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 23:19:22,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:19:22,063 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-30 23:19:22,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:22,064 INFO L225 Difference]: With dead ends: 30 [2018-09-30 23:19:22,064 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 23:19:22,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:19:22,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 23:19:22,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 23:19:22,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:19:22,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 23:19:22,069 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-30 23:19:22,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:22,069 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 23:19:22,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:19:22,069 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 23:19:22,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 23:19:22,070 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:22,070 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-30 23:19:22,070 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:22,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:22,070 INFO L82 PathProgramCache]: Analyzing trace with hash -810295359, now seen corresponding path program 24 times [2018-09-30 23:19:22,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:22,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:22,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:22,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:22,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:22,826 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:22,826 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 [2018-09-30 23:19:22,833 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:19:22,879 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 23:19:22,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:22,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:22,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:22,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 23:19:22,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 23:19:22,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 23:19:22,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:19:22,922 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-30 23:19:22,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:22,995 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 23:19:22,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:19:22,996 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-30 23:19:22,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:22,996 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:19:22,996 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:19:22,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:19:22,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:19:23,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 23:19:23,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 23:19:23,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 23:19:23,001 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-30 23:19:23,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:23,002 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 23:19:23,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 23:19:23,002 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 23:19:23,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 23:19:23,003 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:23,003 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-30 23:19:23,003 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:23,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:23,003 INFO L82 PathProgramCache]: Analyzing trace with hash 650645672, now seen corresponding path program 25 times [2018-09-30 23:19:23,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:23,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:23,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:23,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:23,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:24,333 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:24,333 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:19:24,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:24,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:24,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:24,443 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 23:19:24,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:19:24,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:19:24,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:19:24,444 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-30 23:19:24,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:24,551 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 23:19:24,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 23:19:24,551 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-30 23:19:24,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:24,552 INFO L225 Difference]: With dead ends: 32 [2018-09-30 23:19:24,552 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 23:19:24,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:19:24,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 23:19:24,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 23:19:24,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:19:24,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 23:19:24,557 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-30 23:19:24,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:24,558 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 23:19:24,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:19:24,558 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 23:19:24,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 23:19:24,558 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:24,559 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-30 23:19:24,559 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:24,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:24,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1304822623, now seen corresponding path program 26 times [2018-09-30 23:19:24,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:24,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:24,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:24,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:24,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:26,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:26,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:26,072 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:19:26,123 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:19:26,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:26,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:26,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:26,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 23:19:26,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 23:19:26,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 23:19:26,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:19:26,159 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-30 23:19:26,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:26,427 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 23:19:26,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:19:26,428 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-30 23:19:26,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:26,428 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:19:26,428 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:19:26,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:19:26,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:19:26,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 23:19:26,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 23:19:26,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 23:19:26,433 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-30 23:19:26,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:26,434 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 23:19:26,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 23:19:26,434 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 23:19:26,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 23:19:26,434 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:26,435 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-30 23:19:26,435 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:26,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:26,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1794797624, now seen corresponding path program 27 times [2018-09-30 23:19:26,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:26,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:26,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:26,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:26,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:27,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:27,033 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 [2018-09-30 23:19:27,041 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:19:27,091 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 23:19:27,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:27,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:27,136 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:27,136 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 23:19:27,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:19:27,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:19:27,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:19:27,138 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-30 23:19:27,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:27,194 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 23:19:27,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 23:19:27,195 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-30 23:19:27,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:27,196 INFO L225 Difference]: With dead ends: 34 [2018-09-30 23:19:27,196 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 23:19:27,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:19:27,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 23:19:27,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 23:19:27,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:19:27,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 23:19:27,201 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-30 23:19:27,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:27,201 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 23:19:27,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:19:27,201 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 23:19:27,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 23:19:27,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:27,202 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-30 23:19:27,202 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:27,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:27,203 INFO L82 PathProgramCache]: Analyzing trace with hash 195846529, now seen corresponding path program 28 times [2018-09-30 23:19:27,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:27,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:27,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:27,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:27,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:27,663 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:27,663 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 [2018-09-30 23:19:27,678 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:19:27,728 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:19:27,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:27,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:27,761 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:27,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 23:19:27,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 23:19:27,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 23:19:27,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:19:27,763 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-30 23:19:27,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:27,822 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 23:19:27,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:19:27,823 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-30 23:19:27,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:27,823 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:19:27,823 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:19:27,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:19:27,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:19:27,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 23:19:27,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 23:19:27,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 23:19:27,829 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-30 23:19:27,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:27,829 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 23:19:27,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 23:19:27,829 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 23:19:27,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 23:19:27,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:27,830 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-30 23:19:27,830 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:27,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:27,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1776273128, now seen corresponding path program 29 times [2018-09-30 23:19:27,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:27,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:27,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:27,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:27,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:28,632 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:28,633 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:28,633 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 [2018-09-30 23:19:28,641 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:19:28,712 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 23:19:28,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:28,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:28,756 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:28,756 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 23:19:28,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 23:19:28,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 23:19:28,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:19:28,757 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-30 23:19:28,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:28,941 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-30 23:19:28,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:19:28,942 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-30 23:19:28,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:28,942 INFO L225 Difference]: With dead ends: 36 [2018-09-30 23:19:28,942 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 23:19:28,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:19:28,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 23:19:28,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 23:19:28,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:19:28,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 23:19:28,945 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-30 23:19:28,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:28,945 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 23:19:28,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 23:19:28,945 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 23:19:28,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 23:19:28,946 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:28,946 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-30 23:19:28,946 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:28,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:28,946 INFO L82 PathProgramCache]: Analyzing trace with hash -770109855, now seen corresponding path program 30 times [2018-09-30 23:19:28,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:28,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:28,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:28,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:28,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:29,944 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:29,944 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:29,944 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 [2018-09-30 23:19:29,954 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:19:30,017 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 23:19:30,017 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:30,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:30,030 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:30,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:30,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 23:19:30,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 23:19:30,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 23:19:30,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:19:30,060 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-30 23:19:30,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:30,226 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 23:19:30,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 23:19:30,227 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-30 23:19:30,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:30,227 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:19:30,228 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:19:30,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:19:30,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:19:30,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 23:19:30,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 23:19:30,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 23:19:30,231 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-30 23:19:30,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:30,231 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 23:19:30,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 23:19:30,231 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 23:19:30,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 23:19:30,231 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:30,232 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-30 23:19:30,232 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:30,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:30,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1896396296, now seen corresponding path program 31 times [2018-09-30 23:19:30,232 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:30,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:30,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:30,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:30,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:31,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:31,039 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 [2018-09-30 23:19:31,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:31,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:31,126 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:31,126 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 23:19:31,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:19:31,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:19:31,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:19:31,128 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-30 23:19:31,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:31,201 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-30 23:19:31,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:19:31,201 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-30 23:19:31,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:31,202 INFO L225 Difference]: With dead ends: 38 [2018-09-30 23:19:31,202 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 23:19:31,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:19:31,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 23:19:31,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 23:19:31,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 23:19:31,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 23:19:31,206 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-30 23:19:31,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:31,206 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 23:19:31,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:19:31,206 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 23:19:31,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 23:19:31,207 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:31,207 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-30 23:19:31,207 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:31,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:31,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1341258943, now seen corresponding path program 32 times [2018-09-30 23:19:31,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:31,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:31,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:31,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:31,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:31,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:31,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:19:31,852 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:19:31,903 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:19:31,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:31,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:31,915 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:31,937 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:31,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 23:19:31,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 23:19:31,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 23:19:31,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:19:31,939 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-30 23:19:32,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:32,015 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 23:19:32,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:19:32,016 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-30 23:19:32,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:32,016 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:19:32,017 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:19:32,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:19:32,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:19:32,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 23:19:32,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 23:19:32,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 23:19:32,022 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-30 23:19:32,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:32,022 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 23:19:32,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 23:19:32,022 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 23:19:32,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 23:19:32,023 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:32,023 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-30 23:19:32,023 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:32,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:32,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1370643752, now seen corresponding path program 33 times [2018-09-30 23:19:32,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:32,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:32,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:32,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:32,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:32,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:32,579 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 [2018-09-30 23:19:32,587 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:19:32,645 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 23:19:32,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:32,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:32,687 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:32,687 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 23:19:32,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 23:19:32,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 23:19:32,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:19:32,688 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-30 23:19:32,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:32,754 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-30 23:19:32,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 23:19:32,755 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-30 23:19:32,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:32,755 INFO L225 Difference]: With dead ends: 40 [2018-09-30 23:19:32,755 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 23:19:32,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:19:32,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 23:19:32,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 23:19:32,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 23:19:32,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 23:19:32,760 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-30 23:19:32,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:32,760 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 23:19:32,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 23:19:32,761 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 23:19:32,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 23:19:32,761 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:32,761 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-30 23:19:32,761 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:32,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:32,762 INFO L82 PathProgramCache]: Analyzing trace with hash -459718623, now seen corresponding path program 34 times [2018-09-30 23:19:32,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:32,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:32,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:32,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:32,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:33,896 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:33,896 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 [2018-09-30 23:19:33,903 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:19:33,963 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:19:33,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:33,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:33,995 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:33,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 23:19:33,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 23:19:33,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 23:19:33,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:19:33,996 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-30 23:19:34,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:34,060 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 23:19:34,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:19:34,061 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-30 23:19:34,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:34,061 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:19:34,062 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:19:34,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:19:34,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:19:34,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 23:19:34,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 23:19:34,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 23:19:34,067 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-30 23:19:34,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:34,067 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 23:19:34,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 23:19:34,068 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 23:19:34,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 23:19:34,068 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:34,068 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-30 23:19:34,068 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:34,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:34,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1366377400, now seen corresponding path program 35 times [2018-09-30 23:19:34,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:34,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:34,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:34,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:34,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:35,485 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:35,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:35,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:19:35,493 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:19:35,555 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 23:19:35,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:35,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:35,586 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:35,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 23:19:35,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:19:35,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:19:35,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:19:35,588 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-30 23:19:35,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:35,658 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-30 23:19:35,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 23:19:35,659 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-30 23:19:35,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:35,660 INFO L225 Difference]: With dead ends: 42 [2018-09-30 23:19:35,660 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 23:19:35,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:19:35,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 23:19:35,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 23:19:35,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 23:19:35,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 23:19:35,663 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-30 23:19:35,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:35,664 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 23:19:35,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:19:35,664 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 23:19:35,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 23:19:35,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:35,664 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-30 23:19:35,664 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:35,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:35,665 INFO L82 PathProgramCache]: Analyzing trace with hash 591971585, now seen corresponding path program 36 times [2018-09-30 23:19:35,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:35,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:35,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:35,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:35,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:36,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:36,635 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 [2018-09-30 23:19:36,642 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:19:36,712 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 23:19:36,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:36,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:36,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:36,746 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 23:19:36,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 23:19:36,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 23:19:36,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:19:36,747 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-30 23:19:36,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:36,797 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 23:19:36,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:19:36,797 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-30 23:19:36,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:36,798 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:19:36,798 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:19:36,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:19:36,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:19:36,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 23:19:36,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 23:19:36,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 23:19:36,802 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-30 23:19:36,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:36,802 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 23:19:36,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 23:19:36,802 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 23:19:36,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 23:19:36,803 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:36,803 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-30 23:19:36,803 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:36,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:36,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1171247976, now seen corresponding path program 37 times [2018-09-30 23:19:36,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:36,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:36,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:36,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:36,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:37,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:37,517 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 [2018-09-30 23:19:37,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:37,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:37,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:37,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 23:19:37,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 23:19:37,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 23:19:37,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:19:37,619 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-30 23:19:37,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:37,683 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-30 23:19:37,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 23:19:37,684 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-30 23:19:37,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:37,685 INFO L225 Difference]: With dead ends: 44 [2018-09-30 23:19:37,685 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 23:19:37,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:19:37,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 23:19:37,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 23:19:37,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 23:19:37,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 23:19:37,689 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-30 23:19:37,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:37,689 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 23:19:37,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 23:19:37,690 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 23:19:37,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 23:19:37,690 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:37,690 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-30 23:19:37,690 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:37,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:37,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1948946913, now seen corresponding path program 38 times [2018-09-30 23:19:37,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:37,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:37,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:37,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:37,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:38,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:38,590 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 [2018-09-30 23:19:38,599 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:19:38,657 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:19:38,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:38,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:38,671 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:38,699 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:38,700 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 23:19:38,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 23:19:38,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 23:19:38,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:19:38,701 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-30 23:19:38,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:38,825 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 23:19:38,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 23:19:38,826 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-30 23:19:38,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:38,826 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:19:38,827 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:19:38,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:19:38,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:19:38,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 23:19:38,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 23:19:38,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 23:19:38,831 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-30 23:19:38,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:38,831 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 23:19:38,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 23:19:38,831 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 23:19:38,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 23:19:38,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:38,832 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-30 23:19:38,832 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:38,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:38,833 INFO L82 PathProgramCache]: Analyzing trace with hash 287810184, now seen corresponding path program 39 times [2018-09-30 23:19:38,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:38,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:38,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:38,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:38,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:39,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:39,555 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 [2018-09-30 23:19:39,563 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:19:39,647 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 23:19:39,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:39,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:39,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:39,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 23:19:39,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:19:39,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:19:39,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:19:39,696 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-30 23:19:40,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:40,216 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-30 23:19:40,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 23:19:40,217 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-30 23:19:40,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:40,218 INFO L225 Difference]: With dead ends: 46 [2018-09-30 23:19:40,218 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 23:19:40,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:19:40,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 23:19:40,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 23:19:40,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 23:19:40,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 23:19:40,221 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-30 23:19:40,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:40,221 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 23:19:40,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:19:40,221 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 23:19:40,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 23:19:40,221 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:40,222 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-30 23:19:40,222 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:40,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:40,222 INFO L82 PathProgramCache]: Analyzing trace with hash 332179137, now seen corresponding path program 40 times [2018-09-30 23:19:40,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:40,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:40,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:40,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:40,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:41,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:41,560 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 [2018-09-30 23:19:41,569 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:19:41,635 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:19:41,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:41,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:41,675 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:41,675 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 23:19:41,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 23:19:41,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 23:19:41,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:19:41,676 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-30 23:19:41,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:41,776 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 23:19:41,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 23:19:41,777 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-30 23:19:41,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:41,778 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:19:41,778 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:19:41,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:19:41,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:19:41,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 23:19:41,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 23:19:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 23:19:41,781 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-30 23:19:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:41,781 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 23:19:41,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 23:19:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 23:19:41,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 23:19:41,782 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:41,782 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-30 23:19:41,782 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:41,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:41,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1707616680, now seen corresponding path program 41 times [2018-09-30 23:19:41,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:41,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:41,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:41,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:41,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:42,539 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:42,539 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 [2018-09-30 23:19:42,548 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:19:42,702 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 23:19:42,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:42,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:42,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:42,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 23:19:42,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 23:19:42,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 23:19:42,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:19:42,745 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-30 23:19:42,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:42,811 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-30 23:19:42,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 23:19:42,811 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-30 23:19:42,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:42,812 INFO L225 Difference]: With dead ends: 48 [2018-09-30 23:19:42,812 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 23:19:42,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:19:42,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 23:19:42,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 23:19:42,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 23:19:42,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 23:19:42,816 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-30 23:19:42,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:42,816 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 23:19:42,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 23:19:42,816 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 23:19:42,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 23:19:42,816 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:42,817 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-30 23:19:42,817 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:42,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:42,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1396507553, now seen corresponding path program 42 times [2018-09-30 23:19:42,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:42,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:42,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:42,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:42,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:43,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:43,894 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 [2018-09-30 23:19:43,902 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:19:43,972 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 23:19:43,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:43,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:43,986 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:44,006 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:44,006 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 23:19:44,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 23:19:44,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 23:19:44,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:19:44,007 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-30 23:19:44,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:44,093 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 23:19:44,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 23:19:44,093 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-30 23:19:44,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:44,094 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:19:44,094 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:19:44,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:19:44,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:19:44,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 23:19:44,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 23:19:44,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 23:19:44,098 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-30 23:19:44,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:44,099 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 23:19:44,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 23:19:44,099 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 23:19:44,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 23:19:44,099 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:44,099 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-30 23:19:44,100 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:44,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:44,100 INFO L82 PathProgramCache]: Analyzing trace with hash 342059208, now seen corresponding path program 43 times [2018-09-30 23:19:44,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:44,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:44,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:44,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:44,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:45,004 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:45,005 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 [2018-09-30 23:19:45,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:45,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:45,104 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:45,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:45,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 23:19:45,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:19:45,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:19:45,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:19:45,126 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-30 23:19:45,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:45,273 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-30 23:19:45,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 23:19:45,274 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-30 23:19:45,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:45,275 INFO L225 Difference]: With dead ends: 50 [2018-09-30 23:19:45,275 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 23:19:45,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:19:45,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 23:19:45,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 23:19:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 23:19:45,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 23:19:45,279 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-30 23:19:45,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:45,279 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 23:19:45,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:19:45,279 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 23:19:45,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 23:19:45,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:45,280 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-30 23:19:45,280 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:45,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:45,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2013898881, now seen corresponding path program 44 times [2018-09-30 23:19:45,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:45,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:45,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:45,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:45,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:46,246 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:46,246 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 [2018-09-30 23:19:46,253 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:19:46,320 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:19:46,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:46,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:46,353 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:46,353 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 23:19:46,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 23:19:46,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 23:19:46,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:19:46,354 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-30 23:19:46,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:46,463 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 23:19:46,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:19:46,463 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-30 23:19:46,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:46,464 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:19:46,464 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:19:46,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:19:46,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:19:46,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 23:19:46,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 23:19:46,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 23:19:46,467 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-30 23:19:46,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:46,467 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 23:19:46,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 23:19:46,467 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 23:19:46,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 23:19:46,468 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:46,468 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-30 23:19:46,468 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:46,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:46,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1993646104, now seen corresponding path program 45 times [2018-09-30 23:19:46,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:46,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:46,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:46,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:46,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:47,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:47,412 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 [2018-09-30 23:19:47,424 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:19:47,520 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 23:19:47,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:47,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:47,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:47,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:47,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 23:19:47,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:19:47,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:19:47,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:19:47,565 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-30 23:19:47,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:47,947 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-30 23:19:47,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:19:47,948 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-30 23:19:47,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:47,948 INFO L225 Difference]: With dead ends: 52 [2018-09-30 23:19:47,949 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 23:19:47,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:19:47,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 23:19:47,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 23:19:47,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 23:19:47,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 23:19:47,952 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-30 23:19:47,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:47,952 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 23:19:47,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:19:47,952 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 23:19:47,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 23:19:47,953 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:47,953 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-30 23:19:47,953 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:47,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:47,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1673489055, now seen corresponding path program 46 times [2018-09-30 23:19:47,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:47,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:47,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:47,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:47,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:48,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:48,992 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 [2018-09-30 23:19:49,000 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:19:49,073 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:19:49,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:49,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:49,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:49,116 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:49,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 23:19:49,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 23:19:49,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 23:19:49,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:19:49,117 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-30 23:19:49,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:49,194 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 23:19:49,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:19:49,195 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-30 23:19:49,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:49,196 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:19:49,196 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:19:49,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:19:49,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:19:49,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 23:19:49,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 23:19:49,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 23:19:49,199 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-30 23:19:49,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:49,200 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 23:19:49,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 23:19:49,200 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 23:19:49,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 23:19:49,200 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:49,200 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-30 23:19:49,200 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:49,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:49,201 INFO L82 PathProgramCache]: Analyzing trace with hash -338555128, now seen corresponding path program 47 times [2018-09-30 23:19:49,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:49,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:49,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:49,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:49,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:50,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:50,221 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:50,221 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 [2018-09-30 23:19:50,228 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:19:50,339 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 23:19:50,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:50,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:50,383 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:50,383 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 23:19:50,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:19:50,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:19:50,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:19:50,384 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-30 23:19:50,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:50,473 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-30 23:19:50,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 23:19:50,473 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-30 23:19:50,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:50,474 INFO L225 Difference]: With dead ends: 54 [2018-09-30 23:19:50,475 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 23:19:50,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:19:50,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 23:19:50,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 23:19:50,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 23:19:50,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 23:19:50,478 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-30 23:19:50,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:50,478 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 23:19:50,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:19:50,479 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 23:19:50,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 23:19:50,479 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:50,479 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-30 23:19:50,479 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:50,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:50,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1905276351, now seen corresponding path program 48 times [2018-09-30 23:19:50,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:50,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:50,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:50,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:50,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:51,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:51,723 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 [2018-09-30 23:19:51,730 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:19:51,814 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 23:19:51,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:51,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:51,846 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:51,847 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 23:19:51,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 23:19:51,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 23:19:51,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:19:51,848 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-30 23:19:51,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:51,942 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 23:19:51,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 23:19:51,942 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-30 23:19:51,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:51,943 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:19:51,943 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:19:51,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:19:51,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:19:51,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 23:19:51,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 23:19:51,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 23:19:51,946 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-30 23:19:51,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:51,947 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 23:19:51,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 23:19:51,947 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 23:19:51,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 23:19:51,947 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:51,947 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-30 23:19:51,947 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:51,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:51,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1065973288, now seen corresponding path program 49 times [2018-09-30 23:19:51,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:51,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:51,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:51,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:51,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:53,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:53,146 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 [2018-09-30 23:19:53,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:53,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:53,273 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:53,274 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 23:19:53,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 23:19:53,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 23:19:53,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:19:53,275 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-30 23:19:53,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:53,386 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-30 23:19:53,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 23:19:53,387 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-30 23:19:53,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:53,387 INFO L225 Difference]: With dead ends: 56 [2018-09-30 23:19:53,387 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 23:19:53,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:19:53,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 23:19:53,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 23:19:53,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 23:19:53,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 23:19:53,390 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-30 23:19:53,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:53,390 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 23:19:53,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 23:19:53,390 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 23:19:53,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 23:19:53,391 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:53,391 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-30 23:19:53,391 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:53,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:53,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1314568415, now seen corresponding path program 50 times [2018-09-30 23:19:53,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:53,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:53,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:53,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:53,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:54,388 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:54,388 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 [2018-09-30 23:19:54,396 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:19:54,475 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:19:54,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:54,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:54,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:54,524 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 23:19:54,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 23:19:54,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 23:19:54,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:19:54,525 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-30 23:19:54,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:54,671 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 23:19:54,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 23:19:54,671 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-30 23:19:54,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:54,672 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:19:54,672 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:19:54,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:19:54,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:19:54,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 23:19:54,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 23:19:54,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 23:19:54,675 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-30 23:19:54,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:54,676 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 23:19:54,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 23:19:54,676 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 23:19:54,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 23:19:54,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:54,676 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-30 23:19:54,677 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:54,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:54,677 INFO L82 PathProgramCache]: Analyzing trace with hash -2096917176, now seen corresponding path program 51 times [2018-09-30 23:19:54,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:54,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:54,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:54,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:54,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:54,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:56,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:56,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:19:56,294 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:19:56,387 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-30 23:19:56,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:56,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:56,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:56,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 23:19:56,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 23:19:56,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 23:19:56,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:19:56,435 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-30 23:19:56,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:56,760 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-30 23:19:56,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 23:19:56,761 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-30 23:19:56,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:56,761 INFO L225 Difference]: With dead ends: 58 [2018-09-30 23:19:56,761 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 23:19:56,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:19:56,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 23:19:56,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 23:19:56,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 23:19:56,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 23:19:56,764 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-30 23:19:56,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:56,764 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 23:19:56,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 23:19:56,765 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 23:19:56,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 23:19:56,765 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:56,765 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-30 23:19:56,765 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:56,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:56,766 INFO L82 PathProgramCache]: Analyzing trace with hash -579924991, now seen corresponding path program 52 times [2018-09-30 23:19:56,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:56,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:56,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:56,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:56,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:56,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:58,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:58,605 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:58,605 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 [2018-09-30 23:19:58,614 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:19:58,700 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:19:58,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:58,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:58,739 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:58,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 23:19:58,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 23:19:58,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 23:19:58,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:19:58,741 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-30 23:19:58,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:58,850 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 23:19:58,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:19:58,851 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-30 23:19:58,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:58,851 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:19:58,852 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:19:58,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:19:58,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:19:58,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 23:19:58,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 23:19:58,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 23:19:58,856 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-30 23:19:58,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:58,856 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 23:19:58,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 23:19:58,857 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 23:19:58,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 23:19:58,857 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:58,857 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-30 23:19:58,857 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:58,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:58,858 INFO L82 PathProgramCache]: Analyzing trace with hash -797807512, now seen corresponding path program 53 times [2018-09-30 23:19:58,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:58,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:58,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:58,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:58,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:00,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:00,006 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 [2018-09-30 23:20:00,013 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:00,113 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 23:20:00,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:00,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:00,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:00,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 23:20:00,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 23:20:00,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 23:20:00,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:20:00,163 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-30 23:20:00,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:00,240 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-30 23:20:00,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 23:20:00,241 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-30 23:20:00,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:00,242 INFO L225 Difference]: With dead ends: 60 [2018-09-30 23:20:00,242 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 23:20:00,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:20:00,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 23:20:00,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 23:20:00,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 23:20:00,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 23:20:00,246 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-30 23:20:00,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:00,246 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 23:20:00,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 23:20:00,246 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 23:20:00,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 23:20:00,246 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:00,246 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-30 23:20:00,247 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:00,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:00,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1037768929, now seen corresponding path program 54 times [2018-09-30 23:20:00,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:00,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:00,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:00,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:00,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:00,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:01,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:01,698 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 [2018-09-30 23:20:01,708 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:20:01,821 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-30 23:20:01,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:01,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:01,862 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:01,862 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 23:20:01,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 23:20:01,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 23:20:01,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:20:01,863 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-30 23:20:02,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:02,013 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 23:20:02,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 23:20:02,014 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-30 23:20:02,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:02,015 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:20:02,015 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:20:02,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:20:02,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:20:02,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 23:20:02,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 23:20:02,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 23:20:02,018 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-30 23:20:02,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:02,018 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 23:20:02,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 23:20:02,019 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 23:20:02,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 23:20:02,019 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:02,019 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-30 23:20:02,019 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:02,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:02,020 INFO L82 PathProgramCache]: Analyzing trace with hash 2106063752, now seen corresponding path program 55 times [2018-09-30 23:20:02,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:02,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:02,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:02,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:02,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:03,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:03,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:03,205 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 [2018-09-30 23:20:03,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:03,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:03,345 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:03,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 23:20:03,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 23:20:03,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 23:20:03,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:20:03,347 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-30 23:20:03,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:03,571 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-30 23:20:03,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 23:20:03,571 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-30 23:20:03,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:03,572 INFO L225 Difference]: With dead ends: 62 [2018-09-30 23:20:03,572 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 23:20:03,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:20:03,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 23:20:03,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 23:20:03,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 23:20:03,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 23:20:03,576 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-30 23:20:03,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:03,576 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 23:20:03,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 23:20:03,576 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 23:20:03,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 23:20:03,577 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:03,577 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-30 23:20:03,577 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:03,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:03,577 INFO L82 PathProgramCache]: Analyzing trace with hash 863464897, now seen corresponding path program 56 times [2018-09-30 23:20:03,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:03,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:03,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:03,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:03,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:04,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:04,801 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 [2018-09-30 23:20:04,808 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:04,894 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:04,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:04,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:04,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:04,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 23:20:04,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 23:20:04,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 23:20:04,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:20:04,931 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-30 23:20:05,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:05,039 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 23:20:05,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 23:20:05,039 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-30 23:20:05,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:05,040 INFO L225 Difference]: With dead ends: 63 [2018-09-30 23:20:05,040 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 23:20:05,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:20:05,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 23:20:05,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 23:20:05,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 23:20:05,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 23:20:05,044 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-30 23:20:05,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:05,044 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 23:20:05,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 23:20:05,044 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 23:20:05,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 23:20:05,045 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:05,045 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-30 23:20:05,045 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:05,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:05,045 INFO L82 PathProgramCache]: Analyzing trace with hash 997606056, now seen corresponding path program 57 times [2018-09-30 23:20:05,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:05,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:05,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:05,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:05,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:07,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:07,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:07,185 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 [2018-09-30 23:20:07,192 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:07,299 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-30 23:20:07,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:07,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:07,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:07,350 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:07,351 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 23:20:07,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 23:20:07,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 23:20:07,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:20:07,352 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-30 23:20:08,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:08,479 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-30 23:20:08,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 23:20:08,479 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-30 23:20:08,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:08,480 INFO L225 Difference]: With dead ends: 64 [2018-09-30 23:20:08,480 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 23:20:08,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:20:08,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 23:20:08,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 23:20:08,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 23:20:08,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 23:20:08,484 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-30 23:20:08,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:08,484 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 23:20:08,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 23:20:08,484 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 23:20:08,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 23:20:08,485 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:08,485 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-30 23:20:08,485 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:08,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:08,485 INFO L82 PathProgramCache]: Analyzing trace with hash 861014689, now seen corresponding path program 58 times [2018-09-30 23:20:08,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:08,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:08,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:08,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:08,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:08,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:10,079 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:10,080 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 [2018-09-30 23:20:10,091 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:10,182 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:10,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:10,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:10,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:10,222 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 23:20:10,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 23:20:10,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 23:20:10,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:20:10,223 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-30 23:20:10,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:10,333 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 23:20:10,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 23:20:10,333 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-30 23:20:10,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:10,334 INFO L225 Difference]: With dead ends: 65 [2018-09-30 23:20:10,334 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 23:20:10,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:20:10,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 23:20:10,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 23:20:10,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 23:20:10,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 23:20:10,337 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-30 23:20:10,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:10,337 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 23:20:10,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 23:20:10,338 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 23:20:10,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 23:20:10,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:10,338 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-30 23:20:10,338 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:10,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:10,339 INFO L82 PathProgramCache]: Analyzing trace with hash 921649608, now seen corresponding path program 59 times [2018-09-30 23:20:10,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:10,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:10,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:10,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:10,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:12,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:12,021 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 [2018-09-30 23:20:12,028 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:12,147 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 23:20:12,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:12,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:12,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:12,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 23:20:12,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 23:20:12,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 23:20:12,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:20:12,187 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-30 23:20:12,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:12,333 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-30 23:20:12,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 23:20:12,334 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-30 23:20:12,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:12,335 INFO L225 Difference]: With dead ends: 66 [2018-09-30 23:20:12,335 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 23:20:12,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:20:12,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 23:20:12,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 23:20:12,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 23:20:12,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 23:20:12,338 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-30 23:20:12,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:12,338 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 23:20:12,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 23:20:12,339 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 23:20:12,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 23:20:12,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:12,339 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-30 23:20:12,340 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:12,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:12,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1493635199, now seen corresponding path program 60 times [2018-09-30 23:20:12,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:12,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:12,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:12,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:12,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:13,784 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:13,784 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 [2018-09-30 23:20:13,793 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:20:13,904 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 23:20:13,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:13,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:13,950 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:13,950 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 23:20:13,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 23:20:13,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 23:20:13,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:20:13,952 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-30 23:20:14,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:14,075 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 23:20:14,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 23:20:14,076 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-30 23:20:14,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:14,076 INFO L225 Difference]: With dead ends: 67 [2018-09-30 23:20:14,077 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 23:20:14,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:20:14,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 23:20:14,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 23:20:14,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 23:20:14,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 23:20:14,080 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-30 23:20:14,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:14,080 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 23:20:14,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 23:20:14,080 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 23:20:14,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 23:20:14,081 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:14,081 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-30 23:20:14,081 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:14,081 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:14,082 INFO L82 PathProgramCache]: Analyzing trace with hash 941947112, now seen corresponding path program 61 times [2018-09-30 23:20:14,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:14,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:14,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:14,082 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:14,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:15,552 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:15,553 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 [2018-09-30 23:20:15,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:15,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:15,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:15,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:15,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 23:20:15,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 23:20:15,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 23:20:15,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:20:15,691 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-30 23:20:15,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:15,780 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-30 23:20:15,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 23:20:15,780 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-30 23:20:15,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:15,781 INFO L225 Difference]: With dead ends: 68 [2018-09-30 23:20:15,781 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 23:20:15,782 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:20:15,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 23:20:15,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 23:20:15,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 23:20:15,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 23:20:15,785 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-30 23:20:15,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:15,785 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 23:20:15,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 23:20:15,785 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 23:20:15,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 23:20:15,785 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:15,785 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-30 23:20:15,785 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:15,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:15,786 INFO L82 PathProgramCache]: Analyzing trace with hash -864412575, now seen corresponding path program 62 times [2018-09-30 23:20:15,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:15,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:15,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:15,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:15,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:17,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:17,689 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 [2018-09-30 23:20:17,697 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:17,795 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:17,796 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:17,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:17,853 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:17,853 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 23:20:17,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 23:20:17,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 23:20:17,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:20:17,854 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-30 23:20:18,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:18,221 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 23:20:18,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:20:18,222 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-30 23:20:18,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:18,222 INFO L225 Difference]: With dead ends: 69 [2018-09-30 23:20:18,222 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 23:20:18,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:20:18,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 23:20:18,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 23:20:18,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 23:20:18,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 23:20:18,226 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-30 23:20:18,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:18,226 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 23:20:18,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 23:20:18,226 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 23:20:18,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 23:20:18,227 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:18,227 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-30 23:20:18,227 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:18,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:18,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1026988024, now seen corresponding path program 63 times [2018-09-30 23:20:18,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:18,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:18,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:18,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:18,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:19,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:19,751 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 [2018-09-30 23:20:19,769 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:19,940 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-30 23:20:19,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:19,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:19,983 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:19,983 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 23:20:19,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 23:20:19,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 23:20:19,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:20:19,985 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-30 23:20:20,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:20,102 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-30 23:20:20,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 23:20:20,105 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-30 23:20:20,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:20,105 INFO L225 Difference]: With dead ends: 70 [2018-09-30 23:20:20,106 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 23:20:20,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:20:20,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 23:20:20,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 23:20:20,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 23:20:20,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 23:20:20,109 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-30 23:20:20,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:20,110 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 23:20:20,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 23:20:20,110 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 23:20:20,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 23:20:20,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:20,111 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-30 23:20:20,111 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:20,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:20,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1771859647, now seen corresponding path program 64 times [2018-09-30 23:20:20,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:20,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:20,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:20,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:20,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:22,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:22,475 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 [2018-09-30 23:20:22,483 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:22,580 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:22,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:22,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:22,636 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:22,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 23:20:22,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 23:20:22,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 23:20:22,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:20:22,638 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-30 23:20:22,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:22,832 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 23:20:22,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 23:20:22,832 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-30 23:20:22,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:22,833 INFO L225 Difference]: With dead ends: 71 [2018-09-30 23:20:22,833 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 23:20:22,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:20:22,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 23:20:22,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 23:20:22,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 23:20:22,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 23:20:22,836 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-30 23:20:22,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:22,837 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 23:20:22,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 23:20:22,837 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 23:20:22,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 23:20:22,838 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:22,838 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-30 23:20:22,838 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:22,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:22,838 INFO L82 PathProgramCache]: Analyzing trace with hash 906923816, now seen corresponding path program 65 times [2018-09-30 23:20:22,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:22,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:22,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:22,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:22,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:24,507 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:24,508 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 [2018-09-30 23:20:24,514 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:24,645 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 23:20:24,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:24,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:24,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:24,693 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:24,693 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 23:20:24,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 23:20:24,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 23:20:24,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:20:24,695 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-30 23:20:24,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:24,986 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-30 23:20:24,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 23:20:24,986 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-30 23:20:24,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:24,987 INFO L225 Difference]: With dead ends: 72 [2018-09-30 23:20:24,987 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 23:20:24,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:20:24,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 23:20:24,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 23:20:24,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 23:20:24,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 23:20:24,990 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-30 23:20:24,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:24,991 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 23:20:24,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 23:20:24,991 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 23:20:24,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 23:20:24,991 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:24,992 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-30 23:20:24,992 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:24,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:24,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1950134751, now seen corresponding path program 66 times [2018-09-30 23:20:24,992 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:24,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:24,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:24,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:24,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:26,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:26,740 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 [2018-09-30 23:20:26,749 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:20:26,884 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-30 23:20:26,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:26,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:26,937 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:26,937 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 23:20:26,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 23:20:26,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 23:20:26,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:20:26,939 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-09-30 23:20:27,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:27,101 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 23:20:27,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 23:20:27,102 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-09-30 23:20:27,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:27,103 INFO L225 Difference]: With dead ends: 73 [2018-09-30 23:20:27,103 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 23:20:27,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:20:27,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 23:20:27,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 23:20:27,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 23:20:27,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 23:20:27,107 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-30 23:20:27,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:27,107 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 23:20:27,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 23:20:27,107 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 23:20:27,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 23:20:27,108 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:27,108 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-30 23:20:27,108 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:27,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:27,109 INFO L82 PathProgramCache]: Analyzing trace with hash -324637112, now seen corresponding path program 67 times [2018-09-30 23:20:27,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:27,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:27,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:27,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:27,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:29,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:29,183 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:29,183 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 [2018-09-30 23:20:29,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:29,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:29,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:29,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 23:20:29,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 23:20:29,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 23:20:29,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:20:29,349 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-09-30 23:20:29,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:29,627 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-30 23:20:29,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 23:20:29,627 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-30 23:20:29,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:29,628 INFO L225 Difference]: With dead ends: 74 [2018-09-30 23:20:29,628 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 23:20:29,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:20:29,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 23:20:29,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 23:20:29,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 23:20:29,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 23:20:29,631 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-30 23:20:29,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:29,631 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 23:20:29,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 23:20:29,632 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 23:20:29,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 23:20:29,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:29,632 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-30 23:20:29,632 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:29,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:29,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1473817855, now seen corresponding path program 68 times [2018-09-30 23:20:29,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:29,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:29,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:29,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:29,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:31,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:31,468 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 [2018-09-30 23:20:31,475 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:31,578 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:31,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:31,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:31,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:31,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 23:20:31,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 23:20:31,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 23:20:31,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:20:31,637 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-09-30 23:20:32,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:32,872 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 23:20:32,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 23:20:32,873 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-09-30 23:20:32,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:32,874 INFO L225 Difference]: With dead ends: 75 [2018-09-30 23:20:32,874 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 23:20:32,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:20:32,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 23:20:32,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 23:20:32,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 23:20:32,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 23:20:32,878 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-30 23:20:32,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:32,878 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 23:20:32,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 23:20:32,878 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 23:20:32,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 23:20:32,879 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:32,879 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-30 23:20:32,879 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:32,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:32,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1556284776, now seen corresponding path program 69 times [2018-09-30 23:20:32,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:32,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:32,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:32,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:32,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:34,692 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:34,692 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 [2018-09-30 23:20:34,700 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:34,843 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-30 23:20:34,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:34,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:34,897 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:34,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 23:20:34,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 23:20:34,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 23:20:34,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:20:34,917 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-09-30 23:20:35,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:35,300 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-30 23:20:35,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 23:20:35,301 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-09-30 23:20:35,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:35,302 INFO L225 Difference]: With dead ends: 76 [2018-09-30 23:20:35,302 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 23:20:35,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:20:35,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 23:20:35,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 23:20:35,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 23:20:35,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-30 23:20:35,306 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-30 23:20:35,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:35,306 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-30 23:20:35,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 23:20:35,306 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-30 23:20:35,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 23:20:35,307 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:35,307 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-30 23:20:35,307 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:35,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:35,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1000185825, now seen corresponding path program 70 times [2018-09-30 23:20:35,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:35,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:35,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:35,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:35,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:37,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:37,278 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:37,278 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 [2018-09-30 23:20:37,285 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:37,402 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:37,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:37,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:37,441 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:37,441 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 23:20:37,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 23:20:37,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 23:20:37,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:20:37,443 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-09-30 23:20:37,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:37,791 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 23:20:37,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 23:20:37,791 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-09-30 23:20:37,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:37,792 INFO L225 Difference]: With dead ends: 77 [2018-09-30 23:20:37,792 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 23:20:37,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:20:37,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 23:20:37,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 23:20:37,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 23:20:37,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 23:20:37,796 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-30 23:20:37,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:37,797 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 23:20:37,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 23:20:37,797 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 23:20:37,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 23:20:37,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:37,798 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-30 23:20:37,798 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:37,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:37,798 INFO L82 PathProgramCache]: Analyzing trace with hash 940987528, now seen corresponding path program 71 times [2018-09-30 23:20:37,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:37,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:37,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:37,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:37,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:39,736 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:39,736 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 [2018-09-30 23:20:39,743 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:39,882 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 23:20:39,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:39,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:39,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:39,934 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:39,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 23:20:39,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 23:20:39,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 23:20:39,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:20:39,936 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-09-30 23:20:40,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:40,075 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-30 23:20:40,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 23:20:40,075 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-30 23:20:40,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:40,076 INFO L225 Difference]: With dead ends: 78 [2018-09-30 23:20:40,076 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 23:20:40,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:20:40,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 23:20:40,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 23:20:40,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 23:20:40,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-30 23:20:40,080 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-30 23:20:40,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:40,081 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-30 23:20:40,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 23:20:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-30 23:20:40,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 23:20:40,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:40,082 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-30 23:20:40,082 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:40,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:40,082 INFO L82 PathProgramCache]: Analyzing trace with hash -894159679, now seen corresponding path program 72 times [2018-09-30 23:20:40,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:40,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:40,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:40,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:40,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:42,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:42,257 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 [2018-09-30 23:20:42,265 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:20:42,401 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 23:20:42,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:42,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:42,452 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:42,453 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 23:20:42,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 23:20:42,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 23:20:42,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:20:42,454 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-09-30 23:20:42,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:42,586 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 23:20:42,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 23:20:42,586 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-09-30 23:20:42,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:42,587 INFO L225 Difference]: With dead ends: 79 [2018-09-30 23:20:42,587 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 23:20:42,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:20:42,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 23:20:42,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 23:20:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 23:20:42,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 23:20:42,590 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-30 23:20:42,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:42,591 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 23:20:42,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 23:20:42,591 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 23:20:42,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 23:20:42,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:42,592 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-30 23:20:42,592 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:42,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:42,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1949148248, now seen corresponding path program 73 times [2018-09-30 23:20:42,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:42,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:42,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:42,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:42,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:44,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:44,902 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 [2018-09-30 23:20:44,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:45,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:45,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:45,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 23:20:45,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 23:20:45,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 23:20:45,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:20:45,065 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-09-30 23:20:45,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:45,222 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-30 23:20:45,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 23:20:45,223 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-09-30 23:20:45,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:45,223 INFO L225 Difference]: With dead ends: 80 [2018-09-30 23:20:45,224 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 23:20:45,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:20:45,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 23:20:45,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 23:20:45,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 23:20:45,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-30 23:20:45,228 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-30 23:20:45,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:45,228 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-30 23:20:45,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 23:20:45,228 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-30 23:20:45,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 23:20:45,229 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:45,229 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-30 23:20:45,229 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:45,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:45,229 INFO L82 PathProgramCache]: Analyzing trace with hash -294055519, now seen corresponding path program 74 times [2018-09-30 23:20:45,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:45,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:45,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:45,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:45,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:47,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:47,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:20:47,280 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:47,393 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:47,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:47,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:47,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:47,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 23:20:47,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 23:20:47,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 23:20:47,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:20:47,445 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-09-30 23:20:47,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:47,621 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 23:20:47,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 23:20:47,621 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-09-30 23:20:47,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:47,622 INFO L225 Difference]: With dead ends: 81 [2018-09-30 23:20:47,622 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 23:20:47,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:20:47,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 23:20:47,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 23:20:47,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 23:20:47,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 23:20:47,626 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-30 23:20:47,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:47,626 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 23:20:47,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 23:20:47,626 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 23:20:47,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 23:20:47,627 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:47,627 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-30 23:20:47,627 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:47,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:47,627 INFO L82 PathProgramCache]: Analyzing trace with hash -525788472, now seen corresponding path program 75 times [2018-09-30 23:20:47,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:47,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:47,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:47,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:47,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:49,921 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:49,921 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 [2018-09-30 23:20:49,928 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:50,079 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-30 23:20:50,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:50,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:50,120 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:50,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 23:20:50,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 23:20:50,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 23:20:50,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:20:50,122 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-09-30 23:20:50,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:50,270 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-30 23:20:50,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 23:20:50,270 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-09-30 23:20:50,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:50,271 INFO L225 Difference]: With dead ends: 82 [2018-09-30 23:20:50,271 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 23:20:50,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:20:50,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 23:20:50,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 23:20:50,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 23:20:50,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-30 23:20:50,273 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-30 23:20:50,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:50,273 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-30 23:20:50,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 23:20:50,274 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-30 23:20:50,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 23:20:50,274 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:50,274 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-30 23:20:50,274 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:50,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:50,275 INFO L82 PathProgramCache]: Analyzing trace with hash 880424577, now seen corresponding path program 76 times [2018-09-30 23:20:50,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:50,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:50,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:50,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:50,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:52,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:52,422 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:20:52,429 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:52,546 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:52,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:52,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:52,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:52,592 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:52,592 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 23:20:52,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 23:20:52,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 23:20:52,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:20:52,594 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-09-30 23:20:53,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:53,166 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 23:20:53,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 23:20:53,167 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-09-30 23:20:53,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:53,168 INFO L225 Difference]: With dead ends: 83 [2018-09-30 23:20:53,168 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 23:20:53,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:20:53,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 23:20:53,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 23:20:53,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 23:20:53,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 23:20:53,172 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-30 23:20:53,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:53,172 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 23:20:53,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 23:20:53,172 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 23:20:53,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 23:20:53,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:53,173 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-30 23:20:53,173 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:53,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:53,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1523356136, now seen corresponding path program 77 times [2018-09-30 23:20:53,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:53,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:53,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:53,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:53,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:55,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:55,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:55,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:55,376 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:55,540 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-30 23:20:55,540 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:55,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:55,589 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:55,589 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 23:20:55,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 23:20:55,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 23:20:55,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:20:55,590 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-09-30 23:20:55,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:55,718 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-30 23:20:55,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 23:20:55,718 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-09-30 23:20:55,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:55,719 INFO L225 Difference]: With dead ends: 84 [2018-09-30 23:20:55,719 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 23:20:55,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:20:55,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 23:20:55,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 23:20:55,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 23:20:55,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-30 23:20:55,722 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-30 23:20:55,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:55,723 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-30 23:20:55,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 23:20:55,723 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-30 23:20:55,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 23:20:55,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:55,724 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-30 23:20:55,724 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:55,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:55,724 INFO L82 PathProgramCache]: Analyzing trace with hash -20602015, now seen corresponding path program 78 times [2018-09-30 23:20:55,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:55,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:55,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:55,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:55,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:58,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:58,367 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 [2018-09-30 23:20:58,374 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:20:58,737 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-30 23:20:58,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:58,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:58,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:58,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 23:20:58,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 23:20:58,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 23:20:58,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:20:58,780 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-09-30 23:20:58,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:58,916 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 23:20:58,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 23:20:58,916 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-09-30 23:20:58,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:58,917 INFO L225 Difference]: With dead ends: 85 [2018-09-30 23:20:58,918 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 23:20:58,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:20:58,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 23:20:58,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 23:20:58,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 23:20:58,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 23:20:58,922 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-30 23:20:58,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:58,922 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 23:20:58,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 23:20:58,922 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 23:20:58,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 23:20:58,923 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:58,923 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-30 23:20:58,923 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:58,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:58,923 INFO L82 PathProgramCache]: Analyzing trace with hash -638664440, now seen corresponding path program 79 times [2018-09-30 23:20:58,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:58,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:58,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:58,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:58,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:01,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:01,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:01,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:21:01,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:01,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:01,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:01,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 23:21:01,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 23:21:01,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 23:21:01,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:21:01,514 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-09-30 23:21:01,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:01,680 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-30 23:21:01,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 23:21:01,680 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-09-30 23:21:01,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:01,681 INFO L225 Difference]: With dead ends: 86 [2018-09-30 23:21:01,681 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 23:21:01,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:21:01,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 23:21:01,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-30 23:21:01,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 23:21:01,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-30 23:21:01,685 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-30 23:21:01,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:01,685 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-30 23:21:01,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 23:21:01,685 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-30 23:21:01,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 23:21:01,686 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:01,686 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-30 23:21:01,686 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:01,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:01,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1676236865, now seen corresponding path program 80 times [2018-09-30 23:21:01,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:01,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:01,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:01,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:01,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:04,390 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:04,390 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 [2018-09-30 23:21:04,401 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:04,521 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:04,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:04,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:04,561 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:04,561 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 23:21:04,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 23:21:04,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 23:21:04,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:21:04,563 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-09-30 23:21:04,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:04,758 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 23:21:04,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 23:21:04,759 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-09-30 23:21:04,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:04,759 INFO L225 Difference]: With dead ends: 87 [2018-09-30 23:21:04,760 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 23:21:04,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:21:04,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 23:21:04,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 23:21:04,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 23:21:04,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-30 23:21:04,763 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-30 23:21:04,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:04,763 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-30 23:21:04,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 23:21:04,763 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-30 23:21:04,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 23:21:04,764 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:04,764 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-30 23:21:04,764 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:04,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:04,764 INFO L82 PathProgramCache]: Analyzing trace with hash 423733288, now seen corresponding path program 81 times [2018-09-30 23:21:04,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:04,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:04,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:04,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:04,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:04,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:07,255 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:07,255 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 [2018-09-30 23:21:07,262 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:07,429 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-30 23:21:07,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:07,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:07,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:07,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 23:21:07,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 23:21:07,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 23:21:07,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:21:07,473 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-09-30 23:21:07,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:07,653 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-30 23:21:07,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 23:21:07,653 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-09-30 23:21:07,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:07,654 INFO L225 Difference]: With dead ends: 88 [2018-09-30 23:21:07,654 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 23:21:07,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:21:07,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 23:21:07,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 23:21:07,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 23:21:07,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-30 23:21:07,657 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-30 23:21:07,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:07,657 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-30 23:21:07,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 23:21:07,657 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-30 23:21:07,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-30 23:21:07,657 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:07,657 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-30 23:21:07,658 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:07,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:07,658 INFO L82 PathProgramCache]: Analyzing trace with hash 250828065, now seen corresponding path program 82 times [2018-09-30 23:21:07,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:07,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:07,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:07,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:07,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:10,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:10,549 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:10,549 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 [2018-09-30 23:21:10,558 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:10,685 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:10,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:10,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:10,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:10,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 23:21:10,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 23:21:10,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 23:21:10,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:21:10,741 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-09-30 23:21:10,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:11,000 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 23:21:11,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 23:21:11,000 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-09-30 23:21:11,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:11,001 INFO L225 Difference]: With dead ends: 89 [2018-09-30 23:21:11,001 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 23:21:11,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:21:11,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 23:21:11,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 23:21:11,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 23:21:11,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 23:21:11,005 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-30 23:21:11,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:11,005 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 23:21:11,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 23:21:11,005 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 23:21:11,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 23:21:11,006 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:11,006 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-30 23:21:11,006 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:11,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:11,006 INFO L82 PathProgramCache]: Analyzing trace with hash -814266552, now seen corresponding path program 83 times [2018-09-30 23:21:11,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:11,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:11,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:11,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:11,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:13,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:13,832 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 [2018-09-30 23:21:13,841 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:14,012 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-30 23:21:14,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:14,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:14,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:14,054 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 23:21:14,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 23:21:14,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 23:21:14,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:21:14,055 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-09-30 23:21:14,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:14,528 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-30 23:21:14,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 23:21:14,529 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-09-30 23:21:14,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:14,530 INFO L225 Difference]: With dead ends: 90 [2018-09-30 23:21:14,530 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 23:21:14,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:21:14,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 23:21:14,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 23:21:14,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 23:21:14,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-30 23:21:14,533 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-30 23:21:14,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:14,534 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-30 23:21:14,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 23:21:14,534 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-30 23:21:14,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 23:21:14,534 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:14,534 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-30 23:21:14,535 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:14,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:14,535 INFO L82 PathProgramCache]: Analyzing trace with hash 527538689, now seen corresponding path program 84 times [2018-09-30 23:21:14,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:14,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:14,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:14,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:14,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:17,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:17,580 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 [2018-09-30 23:21:17,587 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:17,754 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 23:21:17,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:17,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:17,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:17,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:17,795 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-30 23:21:17,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 23:21:17,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 23:21:17,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:21:17,797 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-09-30 23:21:18,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:18,003 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 23:21:18,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 23:21:18,003 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-09-30 23:21:18,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:18,004 INFO L225 Difference]: With dead ends: 91 [2018-09-30 23:21:18,004 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 23:21:18,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:21:18,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 23:21:18,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 23:21:18,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 23:21:18,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-30 23:21:18,008 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-30 23:21:18,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:18,008 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-30 23:21:18,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 23:21:18,008 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-30 23:21:18,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 23:21:18,009 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:18,009 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-30 23:21:18,009 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:18,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:18,010 INFO L82 PathProgramCache]: Analyzing trace with hash -826171800, now seen corresponding path program 85 times [2018-09-30 23:21:18,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:18,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:18,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:18,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:18,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:21,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:21,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:21,225 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 [2018-09-30 23:21:21,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:21,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:21,401 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:21,401 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 23:21:21,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 23:21:21,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 23:21:21,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:21:21,403 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-09-30 23:21:21,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:21,563 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-30 23:21:21,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 23:21:21,563 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-09-30 23:21:21,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:21,564 INFO L225 Difference]: With dead ends: 92 [2018-09-30 23:21:21,564 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 23:21:21,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:21:21,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 23:21:21,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-30 23:21:21,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 23:21:21,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-30 23:21:21,567 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-30 23:21:21,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:21,567 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-30 23:21:21,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 23:21:21,568 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-30 23:21:21,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 23:21:21,568 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:21,568 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-30 23:21:21,568 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:21,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:21,569 INFO L82 PathProgramCache]: Analyzing trace with hash 158476001, now seen corresponding path program 86 times [2018-09-30 23:21:21,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:21,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:21,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:21,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:21,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:24,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:24,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:24,675 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 [2018-09-30 23:21:24,683 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:24,815 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:24,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:24,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:24,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:24,857 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:24,857 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 23:21:24,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 23:21:24,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 23:21:24,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:21:24,859 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-09-30 23:21:25,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:25,070 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 23:21:25,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 23:21:25,070 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-09-30 23:21:25,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:25,071 INFO L225 Difference]: With dead ends: 93 [2018-09-30 23:21:25,071 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 23:21:25,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:21:25,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 23:21:25,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 23:21:25,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 23:21:25,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 23:21:25,075 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-30 23:21:25,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:25,075 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 23:21:25,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 23:21:25,075 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 23:21:25,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 23:21:25,076 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:25,076 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-30 23:21:25,076 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:25,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:25,076 INFO L82 PathProgramCache]: Analyzing trace with hash 617786760, now seen corresponding path program 87 times [2018-09-30 23:21:25,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:25,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:25,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:25,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:25,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:28,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:28,082 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 [2018-09-30 23:21:28,090 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:28,270 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-30 23:21:28,270 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:28,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:28,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:28,327 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:28,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 23:21:28,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 23:21:28,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 23:21:28,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:21:28,329 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-09-30 23:21:28,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:28,542 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-30 23:21:28,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 23:21:28,543 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-09-30 23:21:28,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:28,544 INFO L225 Difference]: With dead ends: 94 [2018-09-30 23:21:28,544 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 23:21:28,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:21:28,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 23:21:28,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 23:21:28,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 23:21:28,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-30 23:21:28,547 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-30 23:21:28,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:28,547 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-30 23:21:28,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 23:21:28,547 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-30 23:21:28,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-30 23:21:28,548 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:28,548 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-30 23:21:28,548 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:28,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:28,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1971518401, now seen corresponding path program 88 times [2018-09-30 23:21:28,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:28,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:28,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:28,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:28,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:28,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:31,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:31,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:31,675 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 [2018-09-30 23:21:31,682 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:31,832 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:31,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:31,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:31,874 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:31,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-30 23:21:31,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 23:21:31,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 23:21:31,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:21:31,875 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-09-30 23:21:32,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:32,014 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 23:21:32,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 23:21:32,015 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-09-30 23:21:32,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:32,016 INFO L225 Difference]: With dead ends: 95 [2018-09-30 23:21:32,016 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 23:21:32,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:21:32,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 23:21:32,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 23:21:32,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 23:21:32,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-30 23:21:32,020 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-30 23:21:32,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:32,020 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-30 23:21:32,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 23:21:32,020 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-30 23:21:32,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 23:21:32,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:32,021 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-30 23:21:32,021 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:32,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:32,021 INFO L82 PathProgramCache]: Analyzing trace with hash 987526312, now seen corresponding path program 89 times [2018-09-30 23:21:32,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:32,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:32,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:32,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:32,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:35,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:35,208 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 [2018-09-30 23:21:35,216 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:35,404 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 23:21:35,404 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:35,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:35,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:35,446 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 23:21:35,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 23:21:35,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 23:21:35,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:21:35,448 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-09-30 23:21:35,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:35,674 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-30 23:21:35,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 23:21:35,675 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-09-30 23:21:35,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:35,676 INFO L225 Difference]: With dead ends: 96 [2018-09-30 23:21:35,676 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 23:21:35,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:21:35,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 23:21:35,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 23:21:35,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 23:21:35,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-30 23:21:35,679 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-30 23:21:35,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:35,679 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-30 23:21:35,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 23:21:35,680 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-30 23:21:35,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 23:21:35,680 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:35,680 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-30 23:21:35,680 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:35,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:35,681 INFO L82 PathProgramCache]: Analyzing trace with hash 548542625, now seen corresponding path program 90 times [2018-09-30 23:21:35,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:35,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:35,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:35,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:35,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:38,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:38,678 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:38,678 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 [2018-09-30 23:21:38,687 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:38,875 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-30 23:21:38,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:38,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:38,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:38,917 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:38,917 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-30 23:21:38,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 23:21:38,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 23:21:38,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:21:38,919 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-09-30 23:21:39,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:39,454 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 23:21:39,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 23:21:39,454 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-09-30 23:21:39,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:39,455 INFO L225 Difference]: With dead ends: 97 [2018-09-30 23:21:39,456 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 23:21:39,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:21:39,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 23:21:39,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 23:21:39,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 23:21:39,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 23:21:39,460 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-30 23:21:39,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:39,460 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 23:21:39,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 23:21:39,460 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 23:21:39,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 23:21:39,461 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:39,461 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-30 23:21:39,461 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:39,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:39,461 INFO L82 PathProgramCache]: Analyzing trace with hash -175049784, now seen corresponding path program 91 times [2018-09-30 23:21:39,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:39,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:39,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:39,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:39,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:42,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:42,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:21:42,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:42,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:42,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:42,798 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:42,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 23:21:42,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 23:21:42,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 23:21:42,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:21:42,800 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-09-30 23:21:43,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:43,025 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-30 23:21:43,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 23:21:43,025 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-09-30 23:21:43,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:43,026 INFO L225 Difference]: With dead ends: 98 [2018-09-30 23:21:43,026 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 23:21:43,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:21:43,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 23:21:43,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-30 23:21:43,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 23:21:43,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-30 23:21:43,030 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-30 23:21:43,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:43,030 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-30 23:21:43,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 23:21:43,030 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-30 23:21:43,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 23:21:43,030 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:43,031 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-30 23:21:43,031 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:43,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:43,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1131577983, now seen corresponding path program 92 times [2018-09-30 23:21:43,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:43,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:43,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:43,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:43,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:43,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:46,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:46,422 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:21:46,429 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:46,571 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:46,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:46,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:46,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:46,632 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:46,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 23:21:46,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 23:21:46,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 23:21:46,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:21:46,635 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-09-30 23:21:46,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:46,887 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 23:21:46,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 23:21:46,888 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-09-30 23:21:46,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:46,889 INFO L225 Difference]: With dead ends: 99 [2018-09-30 23:21:46,889 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 23:21:46,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:21:46,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 23:21:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 23:21:46,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 23:21:46,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-30 23:21:46,892 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-30 23:21:46,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:46,892 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-30 23:21:46,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 23:21:46,893 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-30 23:21:46,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 23:21:46,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:46,893 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-30 23:21:46,893 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:46,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:46,894 INFO L82 PathProgramCache]: Analyzing trace with hash -719181080, now seen corresponding path program 93 times [2018-09-30 23:21:46,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:46,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:46,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:46,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:46,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:50,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:50,967 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 [2018-09-30 23:21:50,975 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:51,171 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-30 23:21:51,171 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:51,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:51,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:51,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 23:21:51,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 23:21:51,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 23:21:51,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:21:51,234 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-09-30 23:21:51,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:51,435 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-30 23:21:51,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 23:21:51,436 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-09-30 23:21:51,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:51,437 INFO L225 Difference]: With dead ends: 100 [2018-09-30 23:21:51,437 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 23:21:51,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:21:51,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 23:21:51,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-30 23:21:51,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-30 23:21:51,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-30 23:21:51,441 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-30 23:21:51,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:51,441 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-30 23:21:51,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 23:21:51,441 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-30 23:21:51,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-30 23:21:51,441 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:51,442 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-30 23:21:51,442 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:51,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:51,442 INFO L82 PathProgramCache]: Analyzing trace with hash -819778975, now seen corresponding path program 94 times [2018-09-30 23:21:51,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:51,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:51,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:51,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:51,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:55,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:55,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:21:55,019 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:55,161 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:55,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:55,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:55,203 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:55,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-30 23:21:55,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 23:21:55,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 23:21:55,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:21:55,205 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-09-30 23:21:55,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:55,415 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 23:21:55,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 23:21:55,416 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-09-30 23:21:55,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:55,417 INFO L225 Difference]: With dead ends: 101 [2018-09-30 23:21:55,417 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 23:21:55,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:21:55,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 23:21:55,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 23:21:55,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 23:21:55,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 23:21:55,421 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-30 23:21:55,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:55,421 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 23:21:55,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 23:21:55,421 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 23:21:55,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 23:21:55,424 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:55,424 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-30 23:21:55,424 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:55,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:55,424 INFO L82 PathProgramCache]: Analyzing trace with hash 356653576, now seen corresponding path program 95 times [2018-09-30 23:21:55,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:55,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:55,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:55,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:55,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:59,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:59,158 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 [2018-09-30 23:21:59,166 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:59,371 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-30 23:21:59,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:59,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:59,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:59,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 23:21:59,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 23:21:59,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 23:21:59,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:21:59,417 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-09-30 23:22:00,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:00,065 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-30 23:22:00,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 23:22:00,065 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-09-30 23:22:00,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:00,066 INFO L225 Difference]: With dead ends: 102 [2018-09-30 23:22:00,066 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 23:22:00,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:22:00,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 23:22:00,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 23:22:00,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 23:22:00,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-30 23:22:00,070 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-30 23:22:00,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:00,070 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-30 23:22:00,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 23:22:00,070 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-30 23:22:00,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 23:22:00,071 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:00,071 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-30 23:22:00,071 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:00,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:00,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1828643007, now seen corresponding path program 96 times [2018-09-30 23:22:00,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:00,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:00,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:00,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:00,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:03,419 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:03,419 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 [2018-09-30 23:22:03,428 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:22:03,627 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 23:22:03,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:03,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:03,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:03,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-30 23:22:03,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 23:22:03,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 23:22:03,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 23:22:03,672 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-09-30 23:22:03,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:03,944 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 23:22:03,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 23:22:03,945 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-09-30 23:22:03,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:03,946 INFO L225 Difference]: With dead ends: 103 [2018-09-30 23:22:03,946 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 23:22:03,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 23:22:03,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 23:22:03,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 23:22:03,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 23:22:03,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-30 23:22:03,950 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-30 23:22:03,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:03,951 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-30 23:22:03,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 23:22:03,951 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-30 23:22:03,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 23:22:03,951 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:03,951 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-30 23:22:03,951 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:03,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:03,952 INFO L82 PathProgramCache]: Analyzing trace with hash -853360344, now seen corresponding path program 97 times [2018-09-30 23:22:03,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:03,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:03,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:03,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:03,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:07,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:07,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:07,690 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:22:07,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:07,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:07,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:07,890 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:07,890 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 23:22:07,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 23:22:07,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 23:22:07,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 23:22:07,891 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-09-30 23:22:08,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:08,164 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-30 23:22:08,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 23:22:08,164 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-09-30 23:22:08,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:08,166 INFO L225 Difference]: With dead ends: 104 [2018-09-30 23:22:08,166 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 23:22:08,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 23:22:08,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 23:22:08,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-30 23:22:08,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-30 23:22:08,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-30 23:22:08,170 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-30 23:22:08,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:08,170 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-30 23:22:08,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 23:22:08,170 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-30 23:22:08,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 23:22:08,171 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:08,171 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-30 23:22:08,171 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:08,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:08,171 INFO L82 PathProgramCache]: Analyzing trace with hash -684368863, now seen corresponding path program 98 times [2018-09-30 23:22:08,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:08,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:08,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:08,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:08,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:12,030 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:12,030 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 [2018-09-30 23:22:12,037 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:22:12,188 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:22:12,188 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:12,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:12,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:12,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-30 23:22:12,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 23:22:12,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 23:22:12,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:22:12,234 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-09-30 23:22:12,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:12,435 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 23:22:12,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 23:22:12,435 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-09-30 23:22:12,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:12,436 INFO L225 Difference]: With dead ends: 105 [2018-09-30 23:22:12,437 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 23:22:12,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:22:12,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 23:22:12,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 23:22:12,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 23:22:12,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 23:22:12,440 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-30 23:22:12,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:12,440 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 23:22:12,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 23:22:12,440 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 23:22:12,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 23:22:12,441 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:12,441 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-30 23:22:12,441 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:12,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:12,441 INFO L82 PathProgramCache]: Analyzing trace with hash 259399752, now seen corresponding path program 99 times [2018-09-30 23:22:12,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:12,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:12,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:12,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:12,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:16,292 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:16,292 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:22:16,299 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:22:16,533 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-30 23:22:16,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:16,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:16,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:16,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:16,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 23:22:16,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 23:22:16,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 23:22:16,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:22:16,580 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-09-30 23:22:16,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:16,840 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-30 23:22:16,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 23:22:16,841 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-09-30 23:22:16,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:16,842 INFO L225 Difference]: With dead ends: 106 [2018-09-30 23:22:16,842 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 23:22:16,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:22:16,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 23:22:16,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 23:22:16,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 23:22:16,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-30 23:22:16,847 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-30 23:22:16,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:16,847 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-30 23:22:16,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 23:22:16,847 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-30 23:22:16,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-30 23:22:16,848 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:16,848 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-30 23:22:16,848 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:16,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:16,848 INFO L82 PathProgramCache]: Analyzing trace with hash -548544255, now seen corresponding path program 100 times [2018-09-30 23:22:16,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:16,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:16,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:16,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:16,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:20,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:20,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:20,778 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 [2018-09-30 23:22:20,784 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:22:20,934 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:22:20,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:20,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:20,979 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:20,979 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-30 23:22:20,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 23:22:20,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 23:22:20,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 23:22:20,981 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-09-30 23:22:21,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:21,170 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 23:22:21,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 23:22:21,171 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-09-30 23:22:21,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:21,172 INFO L225 Difference]: With dead ends: 107 [2018-09-30 23:22:21,172 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 23:22:21,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 23:22:21,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 23:22:21,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 23:22:21,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 23:22:21,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-30 23:22:21,176 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-30 23:22:21,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:21,177 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-30 23:22:21,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 23:22:21,177 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-30 23:22:21,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 23:22:21,178 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:21,178 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-30 23:22:21,178 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:21,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:21,178 INFO L82 PathProgramCache]: Analyzing trace with hash 174995304, now seen corresponding path program 101 times [2018-09-30 23:22:21,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:21,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:21,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:21,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:21,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:25,326 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:25,326 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 [2018-09-30 23:22:25,332 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:22:25,553 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-30 23:22:25,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:25,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:25,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:25,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-30 23:22:25,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 23:22:25,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 23:22:25,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:22:25,603 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-09-30 23:22:25,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:25,827 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-30 23:22:25,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 23:22:25,827 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-09-30 23:22:25,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:25,828 INFO L225 Difference]: With dead ends: 108 [2018-09-30 23:22:25,828 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 23:22:25,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:22:25,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 23:22:25,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 23:22:25,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 23:22:25,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-30 23:22:25,832 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-30 23:22:25,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:25,832 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-30 23:22:25,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 23:22:25,833 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-30 23:22:25,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-30 23:22:25,833 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:25,833 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-30 23:22:25,833 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:25,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:25,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1129885153, now seen corresponding path program 102 times [2018-09-30 23:22:25,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:25,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:25,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:25,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:25,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:29,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:29,729 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 [2018-09-30 23:22:29,739 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:22:29,954 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-30 23:22:29,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:29,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:30,019 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:30,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-30 23:22:30,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-30 23:22:30,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-30 23:22:30,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 23:22:30,021 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-09-30 23:22:30,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:30,382 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 23:22:30,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 23:22:30,383 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-09-30 23:22:30,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:30,383 INFO L225 Difference]: With dead ends: 109 [2018-09-30 23:22:30,383 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 23:22:30,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 23:22:30,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 23:22:30,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 23:22:30,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 23:22:30,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-30 23:22:30,387 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-30 23:22:30,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:30,388 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-30 23:22:30,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-30 23:22:30,388 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-30 23:22:30,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 23:22:30,389 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:30,389 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-30 23:22:30,389 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:30,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:30,389 INFO L82 PathProgramCache]: Analyzing trace with hash 666699400, now seen corresponding path program 103 times [2018-09-30 23:22:30,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:30,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:30,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:30,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:30,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:34,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:34,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:22:34,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:34,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:34,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:34,475 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:34,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-30 23:22:34,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 23:22:34,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 23:22:34,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:22:34,478 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-09-30 23:22:34,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:34,878 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-30 23:22:34,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 23:22:34,878 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-09-30 23:22:34,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:34,879 INFO L225 Difference]: With dead ends: 110 [2018-09-30 23:22:34,879 INFO L226 Difference]: Without dead ends: 108 [2018-09-30 23:22:34,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:22:34,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-30 23:22:34,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-30 23:22:34,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 23:22:34,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-30 23:22:34,882 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-30 23:22:34,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:34,882 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-30 23:22:34,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 23:22:34,883 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-30 23:22:34,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 23:22:34,883 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:34,883 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-30 23:22:34,883 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:34,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:34,884 INFO L82 PathProgramCache]: Analyzing trace with hash -807157055, now seen corresponding path program 104 times [2018-09-30 23:22:34,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:34,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:34,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:34,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:34,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:39,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:39,177 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:39,177 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:22:39,184 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:22:39,341 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:22:39,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:39,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:39,389 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:39,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-30 23:22:39,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 23:22:39,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 23:22:39,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:22:39,391 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-09-30 23:22:39,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:39,587 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 23:22:39,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 23:22:39,587 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-09-30 23:22:39,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:39,588 INFO L225 Difference]: With dead ends: 111 [2018-09-30 23:22:39,588 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 23:22:39,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:22:39,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 23:22:39,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 23:22:39,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 23:22:39,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-30 23:22:39,591 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-30 23:22:39,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:39,592 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-30 23:22:39,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 23:22:39,592 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-30 23:22:39,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 23:22:39,592 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:39,592 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-30 23:22:39,593 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:39,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:39,593 INFO L82 PathProgramCache]: Analyzing trace with hash 747933096, now seen corresponding path program 105 times [2018-09-30 23:22:39,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:39,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:39,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:39,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:39,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:43,972 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:43,972 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:22:43,980 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:22:44,210 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-30 23:22:44,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:44,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:44,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:44,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-30 23:22:44,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 23:22:44,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 23:22:44,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 23:22:44,269 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-09-30 23:22:44,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:44,592 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-30 23:22:44,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 23:22:44,592 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-09-30 23:22:44,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:44,593 INFO L225 Difference]: With dead ends: 112 [2018-09-30 23:22:44,593 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 23:22:44,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 23:22:44,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 23:22:44,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-30 23:22:44,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 23:22:44,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-30 23:22:44,597 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-30 23:22:44,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:44,597 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-30 23:22:44,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 23:22:44,597 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-30 23:22:44,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-30 23:22:44,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:44,598 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-30 23:22:44,598 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:44,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:44,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1711087521, now seen corresponding path program 106 times [2018-09-30 23:22:44,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:44,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:44,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:44,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:44,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:48,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:48,976 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:48,976 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:22:48,984 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:22:49,142 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:22:49,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:49,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:49,190 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:49,190 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-30 23:22:49,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-30 23:22:49,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-30 23:22:49,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 23:22:49,191 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-09-30 23:22:49,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:49,514 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 23:22:49,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 23:22:49,514 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-09-30 23:22:49,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:49,515 INFO L225 Difference]: With dead ends: 113 [2018-09-30 23:22:49,515 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 23:22:49,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 23:22:49,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 23:22:49,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 23:22:49,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 23:22:49,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-30 23:22:49,519 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-30 23:22:49,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:49,520 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-30 23:22:49,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-30 23:22:49,520 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-30 23:22:49,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 23:22:49,521 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:49,521 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-30 23:22:49,521 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:49,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:49,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1504103624, now seen corresponding path program 107 times [2018-09-30 23:22:49,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:49,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:49,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:49,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:49,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:54,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:54,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:54,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:54,014 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:22:54,254 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-30 23:22:54,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:54,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:54,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:54,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:54,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-30 23:22:54,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 23:22:54,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 23:22:54,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:22:54,306 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-09-30 23:22:54,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:54,614 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-09-30 23:22:54,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 23:22:54,615 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-09-30 23:22:54,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:54,615 INFO L225 Difference]: With dead ends: 114 [2018-09-30 23:22:54,615 INFO L226 Difference]: Without dead ends: 112 [2018-09-30 23:22:54,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:22:54,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-30 23:22:54,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-30 23:22:54,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 23:22:54,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-30 23:22:54,618 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-09-30 23:22:54,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:54,618 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-30 23:22:54,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 23:22:54,618 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-30 23:22:54,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 23:22:54,619 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:54,619 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-09-30 23:22:54,619 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:54,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:54,619 INFO L82 PathProgramCache]: Analyzing trace with hash -617429887, now seen corresponding path program 108 times [2018-09-30 23:22:54,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:54,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:54,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:54,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:54,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:54,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:59,179 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:59,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:59,186 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:22:59,432 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 23:22:59,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:59,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:59,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:59,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-30 23:22:59,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-30 23:22:59,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-30 23:22:59,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 23:22:59,483 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-09-30 23:22:59,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:59,805 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 23:22:59,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-30 23:22:59,806 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-09-30 23:22:59,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:59,806 INFO L225 Difference]: With dead ends: 115 [2018-09-30 23:22:59,807 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 23:22:59,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 23:22:59,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 23:22:59,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 23:22:59,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 23:22:59,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-30 23:22:59,810 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-09-30 23:22:59,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:59,810 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-30 23:22:59,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-30 23:22:59,811 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-30 23:22:59,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 23:22:59,811 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:59,811 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-09-30 23:22:59,811 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:59,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:59,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1960459288, now seen corresponding path program 109 times [2018-09-30 23:22:59,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:59,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:59,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:59,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:59,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:04,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:04,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:04,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:04,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:04,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:04,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:04,810 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:04,810 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-30 23:23:04,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 23:23:04,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 23:23:04,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 23:23:04,812 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-09-30 23:23:05,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:05,092 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-09-30 23:23:05,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-30 23:23:05,093 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-09-30 23:23:05,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:05,094 INFO L225 Difference]: With dead ends: 116 [2018-09-30 23:23:05,094 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 23:23:05,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 23:23:05,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 23:23:05,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-30 23:23:05,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-30 23:23:05,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-30 23:23:05,098 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-09-30 23:23:05,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:05,099 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-30 23:23:05,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 23:23:05,099 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-30 23:23:05,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 23:23:05,099 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:05,100 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-09-30 23:23:05,100 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:05,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:05,100 INFO L82 PathProgramCache]: Analyzing trace with hash -644697759, now seen corresponding path program 110 times [2018-09-30 23:23:05,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:05,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:05,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:05,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:05,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:09,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:09,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:09,813 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:09,820 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:23:09,988 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:23:09,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:09,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:10,035 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:10,035 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-30 23:23:10,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 23:23:10,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 23:23:10,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 23:23:10,037 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-09-30 23:23:10,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:10,374 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 23:23:10,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 23:23:10,374 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-09-30 23:23:10,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:10,375 INFO L225 Difference]: With dead ends: 117 [2018-09-30 23:23:10,375 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 23:23:10,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 23:23:10,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 23:23:10,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 23:23:10,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 23:23:10,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-30 23:23:10,379 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-09-30 23:23:10,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:10,379 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-30 23:23:10,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 23:23:10,379 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-30 23:23:10,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 23:23:10,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:10,380 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-09-30 23:23:10,380 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:10,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:10,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1489203976, now seen corresponding path program 111 times [2018-09-30 23:23:10,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:10,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:10,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:10,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:10,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:15,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:15,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:15,157 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:23:15,454 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-09-30 23:23:15,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:15,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:15,504 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:15,504 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-30 23:23:15,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 23:23:15,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 23:23:15,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:23:15,506 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 114 states. [2018-09-30 23:23:15,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:15,859 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-09-30 23:23:15,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-30 23:23:15,859 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-09-30 23:23:15,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:15,860 INFO L225 Difference]: With dead ends: 118 [2018-09-30 23:23:15,860 INFO L226 Difference]: Without dead ends: 116 [2018-09-30 23:23:15,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:23:15,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-30 23:23:15,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-30 23:23:15,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-30 23:23:15,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-30 23:23:15,863 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-09-30 23:23:15,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:15,863 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-30 23:23:15,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 23:23:15,863 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-30 23:23:15,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-30 23:23:15,864 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:15,864 INFO L375 BasicCegarLoop]: trace histogram [112, 1, 1, 1] [2018-09-30 23:23:15,864 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:15,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:15,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1079318975, now seen corresponding path program 112 times [2018-09-30 23:23:15,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:15,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:15,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:15,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:15,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:20,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:20,663 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:20,663 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:20,670 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:23:20,840 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:23:20,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:20,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:20,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:20,894 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-09-30 23:23:20,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-09-30 23:23:20,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-09-30 23:23:20,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-09-30 23:23:20,895 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 115 states. [2018-09-30 23:23:21,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:21,306 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-30 23:23:21,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-30 23:23:21,306 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 115 [2018-09-30 23:23:21,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:21,307 INFO L225 Difference]: With dead ends: 119 [2018-09-30 23:23:21,307 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 23:23:21,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-09-30 23:23:21,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 23:23:21,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 23:23:21,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 23:23:21,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-30 23:23:21,310 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2018-09-30 23:23:21,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:21,310 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-30 23:23:21,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-09-30 23:23:21,310 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-30 23:23:21,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 23:23:21,311 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:21,311 INFO L375 BasicCegarLoop]: trace histogram [113, 1, 1, 1] [2018-09-30 23:23:21,311 INFO L423 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:21,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:21,311 INFO L82 PathProgramCache]: Analyzing trace with hash 900848168, now seen corresponding path program 113 times [2018-09-30 23:23:21,311 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:21,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:21,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:21,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:21,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:26,093 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:26,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:26,100 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:23:26,359 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-09-30 23:23:26,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:26,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:26,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:26,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 115 [2018-09-30 23:23:26,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 23:23:26,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 23:23:26,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:23:26,423 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 116 states. [2018-09-30 23:23:26,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:26,841 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-09-30 23:23:26,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-30 23:23:26,841 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 116 [2018-09-30 23:23:26,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:26,842 INFO L225 Difference]: With dead ends: 120 [2018-09-30 23:23:26,842 INFO L226 Difference]: Without dead ends: 118 [2018-09-30 23:23:26,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:23:26,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-30 23:23:26,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-30 23:23:26,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-30 23:23:26,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-30 23:23:26,845 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2018-09-30 23:23:26,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:26,845 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-30 23:23:26,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 23:23:26,845 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-30 23:23:26,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-30 23:23:26,846 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:26,846 INFO L375 BasicCegarLoop]: trace histogram [114, 1, 1, 1] [2018-09-30 23:23:26,846 INFO L423 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:26,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:26,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2138479839, now seen corresponding path program 114 times [2018-09-30 23:23:26,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:26,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:26,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:26,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:26,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:31,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:31,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:31,853 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:23:32,130 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2018-09-30 23:23:32,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:32,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:32,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:32,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 116 [2018-09-30 23:23:32,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-09-30 23:23:32,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-09-30 23:23:32,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-09-30 23:23:32,182 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 117 states. [2018-09-30 23:23:32,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:32,411 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 23:23:32,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-30 23:23:32,412 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 117 [2018-09-30 23:23:32,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:32,413 INFO L225 Difference]: With dead ends: 121 [2018-09-30 23:23:32,413 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 23:23:32,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-09-30 23:23:32,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 23:23:32,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 23:23:32,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 23:23:32,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-30 23:23:32,416 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2018-09-30 23:23:32,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:32,416 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-30 23:23:32,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-09-30 23:23:32,416 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-30 23:23:32,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 23:23:32,417 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:32,417 INFO L375 BasicCegarLoop]: trace histogram [115, 1, 1, 1] [2018-09-30 23:23:32,417 INFO L423 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:32,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:32,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1868367544, now seen corresponding path program 115 times [2018-09-30 23:23:32,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:32,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:32,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:32,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:32,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:37,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:37,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:37,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:37,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:37,665 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:37,666 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 117 [2018-09-30 23:23:37,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 23:23:37,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 23:23:37,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:23:37,668 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 118 states. [2018-09-30 23:23:38,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:38,058 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-09-30 23:23:38,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-30 23:23:38,058 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 118 [2018-09-30 23:23:38,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:38,059 INFO L225 Difference]: With dead ends: 122 [2018-09-30 23:23:38,059 INFO L226 Difference]: Without dead ends: 120 [2018-09-30 23:23:38,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:23:38,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-30 23:23:38,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-30 23:23:38,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-30 23:23:38,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-30 23:23:38,062 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2018-09-30 23:23:38,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:38,062 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-30 23:23:38,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 23:23:38,062 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-30 23:23:38,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-30 23:23:38,062 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:38,062 INFO L375 BasicCegarLoop]: trace histogram [116, 1, 1, 1] [2018-09-30 23:23:38,062 INFO L423 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:38,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:38,063 INFO L82 PathProgramCache]: Analyzing trace with hash -2084820991, now seen corresponding path program 116 times [2018-09-30 23:23:38,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:38,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:38,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:38,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:38,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:43,310 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:43,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:43,318 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:23:43,491 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:23:43,491 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:43,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:43,540 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:43,540 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 118 [2018-09-30 23:23:43,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-30 23:23:43,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-30 23:23:43,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:23:43,542 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 119 states. [2018-09-30 23:23:43,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:43,938 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-30 23:23:43,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-30 23:23:43,939 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 119 [2018-09-30 23:23:43,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:43,940 INFO L225 Difference]: With dead ends: 123 [2018-09-30 23:23:43,940 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 23:23:43,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:23:43,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 23:23:43,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 23:23:43,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 23:23:43,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-30 23:23:43,942 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2018-09-30 23:23:43,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:43,943 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-30 23:23:43,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-30 23:23:43,943 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-30 23:23:43,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-30 23:23:43,943 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:43,943 INFO L375 BasicCegarLoop]: trace histogram [117, 1, 1, 1] [2018-09-30 23:23:43,943 INFO L423 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:43,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:43,944 INFO L82 PathProgramCache]: Analyzing trace with hash -204943256, now seen corresponding path program 117 times [2018-09-30 23:23:43,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:43,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:43,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:43,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:43,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:49,339 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:49,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:49,347 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:23:49,621 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-09-30 23:23:49,621 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:49,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:49,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:49,672 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 119 [2018-09-30 23:23:49,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 23:23:49,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 23:23:49,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:23:49,673 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 120 states. [2018-09-30 23:23:50,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:50,020 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-09-30 23:23:50,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-30 23:23:50,021 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 120 [2018-09-30 23:23:50,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:50,022 INFO L225 Difference]: With dead ends: 124 [2018-09-30 23:23:50,022 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 23:23:50,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:23:50,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 23:23:50,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-30 23:23:50,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-30 23:23:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-30 23:23:50,025 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 120 [2018-09-30 23:23:50,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:50,025 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-30 23:23:50,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 23:23:50,025 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-30 23:23:50,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-30 23:23:50,026 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:50,026 INFO L375 BasicCegarLoop]: trace histogram [118, 1, 1, 1] [2018-09-30 23:23:50,026 INFO L423 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:50,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:50,026 INFO L82 PathProgramCache]: Analyzing trace with hash -2058275615, now seen corresponding path program 118 times [2018-09-30 23:23:50,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:50,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:50,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:50,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:50,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:50,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:55,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:55,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:55,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:55,448 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:23:55,632 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:23:55,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:55,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:55,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:55,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 120 [2018-09-30 23:23:55,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-09-30 23:23:55,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-09-30 23:23:55,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-09-30 23:23:55,682 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 121 states. [2018-09-30 23:23:55,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:55,923 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 23:23:55,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 23:23:55,923 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 121 [2018-09-30 23:23:55,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:55,924 INFO L225 Difference]: With dead ends: 125 [2018-09-30 23:23:55,924 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 23:23:55,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-09-30 23:23:55,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 23:23:55,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 23:23:55,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 23:23:55,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-30 23:23:55,928 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 121 [2018-09-30 23:23:55,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:55,928 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-30 23:23:55,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-09-30 23:23:55,929 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-30 23:23:55,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 23:23:55,929 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:55,929 INFO L375 BasicCegarLoop]: trace histogram [119, 1, 1, 1] [2018-09-30 23:23:55,929 INFO L423 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:55,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:55,930 INFO L82 PathProgramCache]: Analyzing trace with hash 617963400, now seen corresponding path program 119 times [2018-09-30 23:23:55,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:55,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:55,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:55,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:55,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:01,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:01,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:01,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:01,409 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:24:01,694 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-30 23:24:01,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:01,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:01,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:01,745 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 121 [2018-09-30 23:24:01,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 23:24:01,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 23:24:01,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:24:01,747 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 122 states. [2018-09-30 23:24:02,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:02,205 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-09-30 23:24:02,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-30 23:24:02,205 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 122 [2018-09-30 23:24:02,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:02,205 INFO L225 Difference]: With dead ends: 126 [2018-09-30 23:24:02,205 INFO L226 Difference]: Without dead ends: 124 [2018-09-30 23:24:02,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:24:02,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-30 23:24:02,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-30 23:24:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-30 23:24:02,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-30 23:24:02,210 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 122 [2018-09-30 23:24:02,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:02,210 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-30 23:24:02,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 23:24:02,210 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-30 23:24:02,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-30 23:24:02,211 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:02,211 INFO L375 BasicCegarLoop]: trace histogram [120, 1, 1, 1] [2018-09-30 23:24:02,211 INFO L423 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:02,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:02,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1976994241, now seen corresponding path program 120 times [2018-09-30 23:24:02,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:02,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:02,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:02,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:02,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:07,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:07,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:07,854 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:24:08,122 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 23:24:08,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:08,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:08,171 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:08,171 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 122 [2018-09-30 23:24:08,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-09-30 23:24:08,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-09-30 23:24:08,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-09-30 23:24:08,173 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 123 states. [2018-09-30 23:24:08,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:08,541 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-30 23:24:08,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-09-30 23:24:08,542 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 123 [2018-09-30 23:24:08,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:08,543 INFO L225 Difference]: With dead ends: 127 [2018-09-30 23:24:08,543 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 23:24:08,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-09-30 23:24:08,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 23:24:08,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-30 23:24:08,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 23:24:08,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-30 23:24:08,546 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 123 [2018-09-30 23:24:08,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:08,547 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-30 23:24:08,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-09-30 23:24:08,547 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-30 23:24:08,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-30 23:24:08,547 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:08,547 INFO L375 BasicCegarLoop]: trace histogram [121, 1, 1, 1] [2018-09-30 23:24:08,547 INFO L423 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:08,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:08,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1157277352, now seen corresponding path program 121 times [2018-09-30 23:24:08,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:08,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:08,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:08,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:08,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:14,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:14,216 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:14,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:14,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:14,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:14,455 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:14,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 123 [2018-09-30 23:24:14,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 23:24:14,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 23:24:14,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 23:24:14,458 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 124 states. [2018-09-30 23:24:14,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:14,892 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-09-30 23:24:14,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-09-30 23:24:14,893 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 124 [2018-09-30 23:24:14,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:14,894 INFO L225 Difference]: With dead ends: 128 [2018-09-30 23:24:14,894 INFO L226 Difference]: Without dead ends: 126 [2018-09-30 23:24:14,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 23:24:14,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-30 23:24:14,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-30 23:24:14,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-30 23:24:14,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-30 23:24:14,897 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 124 [2018-09-30 23:24:14,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:14,897 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-30 23:24:14,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 23:24:14,897 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-30 23:24:14,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-30 23:24:14,897 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:14,897 INFO L375 BasicCegarLoop]: trace histogram [122, 1, 1, 1] [2018-09-30 23:24:14,897 INFO L423 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:14,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:14,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1515857569, now seen corresponding path program 122 times [2018-09-30 23:24:14,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:14,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:14,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:14,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:14,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:14,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:20,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:20,690 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:20,698 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:24:20,883 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:24:20,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:20,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:20,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:20,935 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 124 [2018-09-30 23:24:20,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-30 23:24:20,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-30 23:24:20,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-09-30 23:24:20,937 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 125 states. [2018-09-30 23:24:21,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:21,400 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 23:24:21,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-30 23:24:21,400 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 125 [2018-09-30 23:24:21,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:21,401 INFO L225 Difference]: With dead ends: 129 [2018-09-30 23:24:21,401 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 23:24:21,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-09-30 23:24:21,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 23:24:21,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-30 23:24:21,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 23:24:21,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-30 23:24:21,405 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 125 [2018-09-30 23:24:21,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:21,405 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-30 23:24:21,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-30 23:24:21,406 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-30 23:24:21,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-30 23:24:21,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:21,406 INFO L375 BasicCegarLoop]: trace histogram [123, 1, 1, 1] [2018-09-30 23:24:21,407 INFO L423 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:21,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:21,407 INFO L82 PathProgramCache]: Analyzing trace with hash -253057592, now seen corresponding path program 123 times [2018-09-30 23:24:21,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:21,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:21,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:21,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:21,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:27,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:27,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:27,149 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:24:27,470 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-09-30 23:24:27,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:27,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:27,523 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:27,523 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 125 [2018-09-30 23:24:27,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 23:24:27,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 23:24:27,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 23:24:27,525 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 126 states. [2018-09-30 23:24:28,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:28,005 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-09-30 23:24:28,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-09-30 23:24:28,005 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 126 [2018-09-30 23:24:28,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:28,005 INFO L225 Difference]: With dead ends: 130 [2018-09-30 23:24:28,005 INFO L226 Difference]: Without dead ends: 128 [2018-09-30 23:24:28,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 23:24:28,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-30 23:24:28,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-30 23:24:28,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-30 23:24:28,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-30 23:24:28,009 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 126 [2018-09-30 23:24:28,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:28,009 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-30 23:24:28,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 23:24:28,009 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-30 23:24:28,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-30 23:24:28,010 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:28,010 INFO L375 BasicCegarLoop]: trace histogram [124, 1, 1, 1] [2018-09-30 23:24:28,010 INFO L423 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:28,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:28,010 INFO L82 PathProgramCache]: Analyzing trace with hash 745147265, now seen corresponding path program 124 times [2018-09-30 23:24:28,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:28,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:28,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:28,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:28,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:33,808 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:33,808 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:33,815 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:24:34,010 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:24:34,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:34,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:34,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:34,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:34,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 126 [2018-09-30 23:24:34,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-09-30 23:24:34,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-09-30 23:24:34,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-09-30 23:24:34,064 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 127 states. [2018-09-30 23:24:34,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:34,460 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-30 23:24:34,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-30 23:24:34,460 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 127 [2018-09-30 23:24:34,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:34,461 INFO L225 Difference]: With dead ends: 131 [2018-09-30 23:24:34,461 INFO L226 Difference]: Without dead ends: 129 [2018-09-30 23:24:34,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-09-30 23:24:34,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-30 23:24:34,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-30 23:24:34,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 23:24:34,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-30 23:24:34,464 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 127 [2018-09-30 23:24:34,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:34,464 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-30 23:24:34,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-09-30 23:24:34,464 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-30 23:24:34,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 23:24:34,465 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:34,465 INFO L375 BasicCegarLoop]: trace histogram [125, 1, 1, 1] [2018-09-30 23:24:34,465 INFO L423 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:34,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:34,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1624726760, now seen corresponding path program 125 times [2018-09-30 23:24:34,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:34,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:34,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:34,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:34,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:34,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:40,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:40,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:40,357 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:24:40,667 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-09-30 23:24:40,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:40,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:40,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:40,720 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:40,720 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 127 [2018-09-30 23:24:40,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 23:24:40,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 23:24:40,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 23:24:40,722 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 128 states. [2018-09-30 23:24:41,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:41,087 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-09-30 23:24:41,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-30 23:24:41,087 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 128 [2018-09-30 23:24:41,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:41,088 INFO L225 Difference]: With dead ends: 132 [2018-09-30 23:24:41,088 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 23:24:41,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 23:24:41,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 23:24:41,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-30 23:24:41,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-30 23:24:41,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-30 23:24:41,092 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 128 [2018-09-30 23:24:41,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:41,093 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-30 23:24:41,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 23:24:41,093 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-30 23:24:41,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-30 23:24:41,093 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:41,093 INFO L375 BasicCegarLoop]: trace histogram [126, 1, 1, 1] [2018-09-30 23:24:41,094 INFO L423 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:41,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:41,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1173079967, now seen corresponding path program 126 times [2018-09-30 23:24:41,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:41,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:41,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:41,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:41,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:47,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:47,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:47,240 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:24:47,519 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2018-09-30 23:24:47,519 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:47,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:47,570 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:47,570 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 128 [2018-09-30 23:24:47,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-09-30 23:24:47,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-09-30 23:24:47,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-09-30 23:24:47,572 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 129 states. [2018-09-30 23:24:47,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:47,971 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 23:24:47,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-30 23:24:47,972 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 129 [2018-09-30 23:24:47,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:47,973 INFO L225 Difference]: With dead ends: 133 [2018-09-30 23:24:47,973 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 23:24:47,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-09-30 23:24:47,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 23:24:47,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 23:24:47,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 23:24:47,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-30 23:24:47,977 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 129 [2018-09-30 23:24:47,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:47,978 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-30 23:24:47,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-09-30 23:24:47,978 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-30 23:24:47,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 23:24:47,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:47,979 INFO L375 BasicCegarLoop]: trace histogram [127, 1, 1, 1] [2018-09-30 23:24:47,979 INFO L423 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:47,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:47,979 INFO L82 PathProgramCache]: Analyzing trace with hash -2005742584, now seen corresponding path program 127 times [2018-09-30 23:24:47,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:47,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:47,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:47,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:47,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:54,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:54,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:54,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:54,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:54,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:54,495 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:54,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 129 [2018-09-30 23:24:54,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 23:24:54,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 23:24:54,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 23:24:54,497 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 130 states. [2018-09-30 23:24:54,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:54,915 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-09-30 23:24:54,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-09-30 23:24:54,916 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 130 [2018-09-30 23:24:54,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:54,917 INFO L225 Difference]: With dead ends: 134 [2018-09-30 23:24:54,917 INFO L226 Difference]: Without dead ends: 132 [2018-09-30 23:24:54,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 23:24:54,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-30 23:24:54,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-30 23:24:54,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-30 23:24:54,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-30 23:24:54,922 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 130 [2018-09-30 23:24:54,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:54,922 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-30 23:24:54,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 23:24:54,922 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-30 23:24:54,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-30 23:24:54,923 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:54,923 INFO L375 BasicCegarLoop]: trace histogram [128, 1, 1, 1] [2018-09-30 23:24:54,923 INFO L423 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:54,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:54,923 INFO L82 PathProgramCache]: Analyzing trace with hash -2048479935, now seen corresponding path program 128 times [2018-09-30 23:24:54,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:54,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:54,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:54,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:54,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:54,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:01,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:01,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:01,213 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:25:01,407 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:25:01,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:01,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:01,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:01,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 130 [2018-09-30 23:25:01,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-30 23:25:01,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-30 23:25:01,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 23:25:01,463 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 131 states. [2018-09-30 23:25:01,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:01,955 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-30 23:25:01,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-30 23:25:01,956 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 131 [2018-09-30 23:25:01,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:01,956 INFO L225 Difference]: With dead ends: 135 [2018-09-30 23:25:01,956 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 23:25:01,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 23:25:01,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 23:25:01,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 23:25:01,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 23:25:01,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-30 23:25:01,960 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 131 [2018-09-30 23:25:01,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:01,960 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-30 23:25:01,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-30 23:25:01,961 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-30 23:25:01,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 23:25:01,961 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:01,961 INFO L375 BasicCegarLoop]: trace histogram [129, 1, 1, 1] [2018-09-30 23:25:01,961 INFO L423 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:01,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:01,962 INFO L82 PathProgramCache]: Analyzing trace with hash 921629480, now seen corresponding path program 129 times [2018-09-30 23:25:01,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:01,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:01,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:01,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:01,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:08,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:08,284 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:08,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:08,291 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:25:08,614 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2018-09-30 23:25:08,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:08,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:08,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:08,685 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:08,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 131 [2018-09-30 23:25:08,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 23:25:08,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 23:25:08,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 23:25:08,687 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 132 states. [2018-09-30 23:25:09,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:09,177 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-09-30 23:25:09,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-09-30 23:25:09,177 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 132 [2018-09-30 23:25:09,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:09,178 INFO L225 Difference]: With dead ends: 136 [2018-09-30 23:25:09,178 INFO L226 Difference]: Without dead ends: 134 [2018-09-30 23:25:09,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 23:25:09,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-30 23:25:09,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-30 23:25:09,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-30 23:25:09,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-30 23:25:09,182 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 132 [2018-09-30 23:25:09,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:09,182 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-30 23:25:09,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 23:25:09,182 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-30 23:25:09,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-30 23:25:09,183 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:09,183 INFO L375 BasicCegarLoop]: trace histogram [130, 1, 1, 1] [2018-09-30 23:25:09,183 INFO L423 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:09,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:09,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1494259167, now seen corresponding path program 130 times [2018-09-30 23:25:09,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:09,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:09,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:09,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:09,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:09,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:15,578 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:15,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:15,585 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:25:15,787 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:25:15,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:15,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:15,841 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:15,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 132 [2018-09-30 23:25:15,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-09-30 23:25:15,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-09-30 23:25:15,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-09-30 23:25:15,843 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 133 states. [2018-09-30 23:25:16,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:16,283 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 23:25:16,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-09-30 23:25:16,285 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 133 [2018-09-30 23:25:16,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:16,285 INFO L225 Difference]: With dead ends: 137 [2018-09-30 23:25:16,285 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 23:25:16,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-09-30 23:25:16,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 23:25:16,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-30 23:25:16,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 23:25:16,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-30 23:25:16,289 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 133 [2018-09-30 23:25:16,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:16,289 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-30 23:25:16,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-09-30 23:25:16,289 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-30 23:25:16,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 23:25:16,289 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:16,289 INFO L375 BasicCegarLoop]: trace histogram [131, 1, 1, 1] [2018-09-30 23:25:16,290 INFO L423 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:16,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:16,290 INFO L82 PathProgramCache]: Analyzing trace with hash 922604104, now seen corresponding path program 131 times [2018-09-30 23:25:16,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:16,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:16,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:16,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:16,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:22,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:22,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:22,762 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:25:23,076 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-30 23:25:23,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:23,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:23,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:23,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:23,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 133 [2018-09-30 23:25:23,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 23:25:23,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 23:25:23,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 23:25:23,135 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 134 states. [2018-09-30 23:25:23,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:23,616 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-09-30 23:25:23,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-09-30 23:25:23,617 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 134 [2018-09-30 23:25:23,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:23,617 INFO L225 Difference]: With dead ends: 138 [2018-09-30 23:25:23,618 INFO L226 Difference]: Without dead ends: 136 [2018-09-30 23:25:23,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 23:25:23,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-30 23:25:23,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-30 23:25:23,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 23:25:23,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-30 23:25:23,621 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 134 [2018-09-30 23:25:23,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:23,621 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-30 23:25:23,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 23:25:23,622 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-30 23:25:23,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-30 23:25:23,622 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:23,622 INFO L375 BasicCegarLoop]: trace histogram [132, 1, 1, 1] [2018-09-30 23:25:23,622 INFO L423 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:23,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:23,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1464045823, now seen corresponding path program 132 times [2018-09-30 23:25:23,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:23,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:23,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:23,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:23,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:30,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:30,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:30,503 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:25:30,817 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 23:25:30,817 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:30,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:30,871 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:30,871 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 134 [2018-09-30 23:25:30,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-09-30 23:25:30,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-09-30 23:25:30,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-09-30 23:25:30,873 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 135 states. [2018-09-30 23:25:31,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:31,153 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-30 23:25:31,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-09-30 23:25:31,154 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 135 [2018-09-30 23:25:31,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:31,154 INFO L225 Difference]: With dead ends: 139 [2018-09-30 23:25:31,155 INFO L226 Difference]: Without dead ends: 137 [2018-09-30 23:25:31,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-09-30 23:25:31,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-30 23:25:31,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-30 23:25:31,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 23:25:31,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-30 23:25:31,158 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 135 [2018-09-30 23:25:31,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:31,158 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-30 23:25:31,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-09-30 23:25:31,158 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-30 23:25:31,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-30 23:25:31,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:31,159 INFO L375 BasicCegarLoop]: trace histogram [133, 1, 1, 1] [2018-09-30 23:25:31,159 INFO L423 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:31,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:31,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1859217768, now seen corresponding path program 133 times [2018-09-30 23:25:31,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:31,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:31,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:31,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:31,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:31,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:37,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:37,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:37,841 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:37,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:38,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:38,104 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:38,104 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135] total 135 [2018-09-30 23:25:38,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-30 23:25:38,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-30 23:25:38,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 23:25:38,106 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 136 states. [2018-09-30 23:25:38,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:38,534 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2018-09-30 23:25:38,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-09-30 23:25:38,535 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 136 [2018-09-30 23:25:38,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:38,536 INFO L225 Difference]: With dead ends: 140 [2018-09-30 23:25:38,536 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 23:25:38,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 23:25:38,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 23:25:38,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-30 23:25:38,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-30 23:25:38,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-30 23:25:38,539 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 136 [2018-09-30 23:25:38,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:38,540 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-30 23:25:38,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-30 23:25:38,540 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-30 23:25:38,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-30 23:25:38,540 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:38,540 INFO L375 BasicCegarLoop]: trace histogram [134, 1, 1, 1] [2018-09-30 23:25:38,540 INFO L423 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:38,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:38,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1801173985, now seen corresponding path program 134 times [2018-09-30 23:25:38,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:38,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:38,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:38,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:38,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:45,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:45,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:45,638 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:25:45,840 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:25:45,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:45,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:45,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:45,894 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136] total 136 [2018-09-30 23:25:45,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-30 23:25:45,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-30 23:25:45,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-09-30 23:25:45,896 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 137 states. [2018-09-30 23:25:46,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:46,452 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 23:25:46,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-30 23:25:46,452 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 137 [2018-09-30 23:25:46,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:46,453 INFO L225 Difference]: With dead ends: 141 [2018-09-30 23:25:46,453 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 23:25:46,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-09-30 23:25:46,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 23:25:46,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 23:25:46,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 23:25:46,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-30 23:25:46,456 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 137 [2018-09-30 23:25:46,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:46,456 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-30 23:25:46,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-30 23:25:46,456 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-30 23:25:46,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 23:25:46,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:46,457 INFO L375 BasicCegarLoop]: trace histogram [135, 1, 1, 1] [2018-09-30 23:25:46,457 INFO L423 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:46,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:46,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1816712, now seen corresponding path program 135 times [2018-09-30 23:25:46,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:46,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:46,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:46,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:46,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:53,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:53,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:53,417 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:25:53,766 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2018-09-30 23:25:53,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:53,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:53,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:53,821 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:53,821 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137] total 137 [2018-09-30 23:25:53,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 23:25:53,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 23:25:53,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 23:25:53,824 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 138 states. [2018-09-30 23:25:54,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:54,377 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-09-30 23:25:54,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-09-30 23:25:54,377 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 138 [2018-09-30 23:25:54,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:54,378 INFO L225 Difference]: With dead ends: 142 [2018-09-30 23:25:54,378 INFO L226 Difference]: Without dead ends: 140 [2018-09-30 23:25:54,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 23:25:54,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-30 23:25:54,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-30 23:25:54,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-30 23:25:54,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-30 23:25:54,381 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 138 [2018-09-30 23:25:54,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:54,382 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-30 23:25:54,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 23:25:54,382 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-30 23:25:54,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-30 23:25:54,382 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:54,383 INFO L375 BasicCegarLoop]: trace histogram [136, 1, 1, 1] [2018-09-30 23:25:54,383 INFO L423 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:54,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:54,383 INFO L82 PathProgramCache]: Analyzing trace with hash 56316097, now seen corresponding path program 136 times [2018-09-30 23:25:54,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:54,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:54,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:54,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:54,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:01,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:01,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:01,718 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:26:01,952 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:26:01,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:01,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:02,006 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:02,007 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 138] total 138 [2018-09-30 23:26:02,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-09-30 23:26:02,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-09-30 23:26:02,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-09-30 23:26:02,008 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 139 states. [2018-09-30 23:26:02,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:02,345 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-30 23:26:02,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-09-30 23:26:02,346 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 139 [2018-09-30 23:26:02,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:02,346 INFO L225 Difference]: With dead ends: 143 [2018-09-30 23:26:02,346 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 23:26:02,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-09-30 23:26:02,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 23:26:02,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 23:26:02,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 23:26:02,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-30 23:26:02,350 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 139 [2018-09-30 23:26:02,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:02,350 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-30 23:26:02,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-09-30 23:26:02,350 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-30 23:26:02,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 23:26:02,350 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:02,350 INFO L375 BasicCegarLoop]: trace histogram [137, 1, 1, 1] [2018-09-30 23:26:02,351 INFO L423 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:02,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:02,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1745797032, now seen corresponding path program 137 times [2018-09-30 23:26:02,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:02,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:02,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:02,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:02,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:09,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:09,454 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:09,461 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:26:09,818 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2018-09-30 23:26:09,818 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:09,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:09,875 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:09,875 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139] total 139 [2018-09-30 23:26:09,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-30 23:26:09,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-30 23:26:09,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 23:26:09,877 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 140 states. [2018-09-30 23:26:10,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:10,448 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2018-09-30 23:26:10,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-09-30 23:26:10,449 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 140 [2018-09-30 23:26:10,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:10,449 INFO L225 Difference]: With dead ends: 144 [2018-09-30 23:26:10,449 INFO L226 Difference]: Without dead ends: 142 [2018-09-30 23:26:10,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 23:26:10,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-30 23:26:10,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-30 23:26:10,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-30 23:26:10,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-30 23:26:10,453 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 140 [2018-09-30 23:26:10,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:10,453 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-30 23:26:10,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-30 23:26:10,453 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-30 23:26:10,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-30 23:26:10,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:10,454 INFO L375 BasicCegarLoop]: trace histogram [138, 1, 1, 1] [2018-09-30 23:26:10,454 INFO L423 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:10,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:10,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1714868831, now seen corresponding path program 138 times [2018-09-30 23:26:10,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:10,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:10,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:10,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:10,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:17,692 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:17,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:17,700 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:26:18,028 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2018-09-30 23:26:18,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:18,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:18,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:18,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 140] total 140 [2018-09-30 23:26:18,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-09-30 23:26:18,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-09-30 23:26:18,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-09-30 23:26:18,087 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 141 states. [2018-09-30 23:26:18,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:18,534 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-30 23:26:18,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-09-30 23:26:18,534 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 141 [2018-09-30 23:26:18,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:18,535 INFO L225 Difference]: With dead ends: 145 [2018-09-30 23:26:18,535 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 23:26:18,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-09-30 23:26:18,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 23:26:18,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-30 23:26:18,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 23:26:18,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-30 23:26:18,539 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 141 [2018-09-30 23:26:18,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:18,539 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-30 23:26:18,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-09-30 23:26:18,540 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-30 23:26:18,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 23:26:18,540 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:18,540 INFO L375 BasicCegarLoop]: trace histogram [139, 1, 1, 1] [2018-09-30 23:26:18,540 INFO L423 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:18,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:18,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1621328184, now seen corresponding path program 139 times [2018-09-30 23:26:18,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:18,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:18,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:18,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:18,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:26,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:26,037 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:26,037 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:26,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:26:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:26,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:26,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:26,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141, 141] total 141 [2018-09-30 23:26:26,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 23:26:26,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 23:26:26,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 23:26:26,330 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 142 states. [2018-09-30 23:26:26,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:26,885 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-09-30 23:26:26,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-09-30 23:26:26,885 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 142 [2018-09-30 23:26:26,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:26,886 INFO L225 Difference]: With dead ends: 146 [2018-09-30 23:26:26,886 INFO L226 Difference]: Without dead ends: 144 [2018-09-30 23:26:26,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 23:26:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-30 23:26:26,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-09-30 23:26:26,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-30 23:26:26,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-09-30 23:26:26,889 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 142 [2018-09-30 23:26:26,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:26,889 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-09-30 23:26:26,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 23:26:26,889 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-09-30 23:26:26,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-30 23:26:26,890 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:26,890 INFO L375 BasicCegarLoop]: trace histogram [140, 1, 1, 1] [2018-09-30 23:26:26,890 INFO L423 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:26,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:26,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1278431873, now seen corresponding path program 140 times [2018-09-30 23:26:26,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:26,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:26,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:26,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:26:26,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:34,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:34,162 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:34,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:34,169 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:26:34,382 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:26:34,383 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:34,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:34,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:34,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [142, 142] total 142 [2018-09-30 23:26:34,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-09-30 23:26:34,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-09-30 23:26:34,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-09-30 23:26:34,442 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 143 states. [2018-09-30 23:26:35,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:35,027 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-30 23:26:35,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-09-30 23:26:35,027 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 143 [2018-09-30 23:26:35,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:35,028 INFO L225 Difference]: With dead ends: 147 [2018-09-30 23:26:35,028 INFO L226 Difference]: Without dead ends: 145 [2018-09-30 23:26:35,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-09-30 23:26:35,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-30 23:26:35,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-30 23:26:35,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 23:26:35,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-30 23:26:35,031 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 143 [2018-09-30 23:26:35,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:35,031 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-30 23:26:35,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-09-30 23:26:35,031 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-30 23:26:35,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-30 23:26:35,032 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:35,032 INFO L375 BasicCegarLoop]: trace histogram [141, 1, 1, 1] [2018-09-30 23:26:35,032 INFO L423 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:35,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:35,032 INFO L82 PathProgramCache]: Analyzing trace with hash 976680424, now seen corresponding path program 141 times [2018-09-30 23:26:35,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:35,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:35,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:35,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:35,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:42,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:42,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:42,787 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:26:43,150 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2018-09-30 23:26:43,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:43,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:43,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:43,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:43,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143, 143] total 143 [2018-09-30 23:26:43,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-30 23:26:43,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-30 23:26:43,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 23:26:43,234 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 144 states. [2018-09-30 23:26:43,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:43,742 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-09-30 23:26:43,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-09-30 23:26:43,743 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 144 [2018-09-30 23:26:43,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:43,743 INFO L225 Difference]: With dead ends: 148 [2018-09-30 23:26:43,744 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 23:26:43,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 23:26:43,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 23:26:43,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-30 23:26:43,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-30 23:26:43,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-09-30 23:26:43,748 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 144 [2018-09-30 23:26:43,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:43,748 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-09-30 23:26:43,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-30 23:26:43,748 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-09-30 23:26:43,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-30 23:26:43,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:43,748 INFO L375 BasicCegarLoop]: trace histogram [142, 1, 1, 1] [2018-09-30 23:26:43,749 INFO L423 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:43,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:43,749 INFO L82 PathProgramCache]: Analyzing trace with hash 212320097, now seen corresponding path program 142 times [2018-09-30 23:26:43,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:43,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:43,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:43,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:43,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:51,318 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:51,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:51,325 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:26:51,532 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:26:51,532 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:51,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:51,589 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:51,589 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144, 144] total 144 [2018-09-30 23:26:51,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-09-30 23:26:51,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-09-30 23:26:51,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-09-30 23:26:51,591 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 145 states. [2018-09-30 23:26:52,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:52,225 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-30 23:26:52,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-09-30 23:26:52,225 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 145 [2018-09-30 23:26:52,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:52,226 INFO L225 Difference]: With dead ends: 149 [2018-09-30 23:26:52,226 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 23:26:52,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-09-30 23:26:52,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 23:26:52,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-30 23:26:52,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 23:26:52,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-30 23:26:52,229 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 145 [2018-09-30 23:26:52,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:52,229 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-30 23:26:52,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-09-30 23:26:52,229 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-30 23:26:52,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 23:26:52,230 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:52,230 INFO L375 BasicCegarLoop]: trace histogram [143, 1, 1, 1] [2018-09-30 23:26:52,230 INFO L423 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:52,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:52,231 INFO L82 PathProgramCache]: Analyzing trace with hash -2008013560, now seen corresponding path program 143 times [2018-09-30 23:26:52,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:52,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:52,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:52,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:52,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:00,015 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:00,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:00,022 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:27:00,391 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-09-30 23:27:00,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:00,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:00,450 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:00,451 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 145] total 145 [2018-09-30 23:27:00,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-30 23:27:00,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-30 23:27:00,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 23:27:00,452 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 146 states. [2018-09-30 23:27:01,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:01,083 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2018-09-30 23:27:01,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-09-30 23:27:01,084 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 146 [2018-09-30 23:27:01,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:01,085 INFO L225 Difference]: With dead ends: 150 [2018-09-30 23:27:01,085 INFO L226 Difference]: Without dead ends: 148 [2018-09-30 23:27:01,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 23:27:01,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-30 23:27:01,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-30 23:27:01,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-30 23:27:01,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-09-30 23:27:01,089 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 146 [2018-09-30 23:27:01,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:01,089 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-09-30 23:27:01,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-30 23:27:01,089 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-09-30 23:27:01,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-30 23:27:01,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:01,090 INFO L375 BasicCegarLoop]: trace histogram [144, 1, 1, 1] [2018-09-30 23:27:01,090 INFO L423 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:01,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:01,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2118880191, now seen corresponding path program 144 times [2018-09-30 23:27:01,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:01,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:01,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:01,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:01,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:09,282 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:09,282 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:09,289 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:27:09,639 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 23:27:09,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:09,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:09,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:09,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 146] total 146 [2018-09-30 23:27:09,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-09-30 23:27:09,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-09-30 23:27:09,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-09-30 23:27:09,700 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 147 states. [2018-09-30 23:27:10,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:10,170 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-30 23:27:10,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-09-30 23:27:10,171 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 147 [2018-09-30 23:27:10,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:10,171 INFO L225 Difference]: With dead ends: 151 [2018-09-30 23:27:10,172 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 23:27:10,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-09-30 23:27:10,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 23:27:10,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 23:27:10,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 23:27:10,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-30 23:27:10,175 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 147 [2018-09-30 23:27:10,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:10,175 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-30 23:27:10,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-09-30 23:27:10,176 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-30 23:27:10,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 23:27:10,176 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:10,176 INFO L375 BasicCegarLoop]: trace histogram [145, 1, 1, 1] [2018-09-30 23:27:10,176 INFO L423 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:10,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:10,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1260778456, now seen corresponding path program 145 times [2018-09-30 23:27:10,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:10,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:10,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:10,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:10,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:10,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:18,296 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:18,296 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:18,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:27:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:18,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:18,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:18,586 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:18,587 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 147] total 147 [2018-09-30 23:27:18,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-30 23:27:18,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-30 23:27:18,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-09-30 23:27:18,588 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 148 states. [2018-09-30 23:27:19,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:19,237 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2018-09-30 23:27:19,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-09-30 23:27:19,238 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 148 [2018-09-30 23:27:19,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:19,238 INFO L225 Difference]: With dead ends: 152 [2018-09-30 23:27:19,239 INFO L226 Difference]: Without dead ends: 150 [2018-09-30 23:27:19,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-09-30 23:27:19,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-09-30 23:27:19,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-09-30 23:27:19,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-30 23:27:19,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-09-30 23:27:19,242 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 148 [2018-09-30 23:27:19,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:19,243 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-09-30 23:27:19,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-30 23:27:19,243 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-09-30 23:27:19,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-30 23:27:19,243 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:19,243 INFO L375 BasicCegarLoop]: trace histogram [146, 1, 1, 1] [2018-09-30 23:27:19,243 INFO L423 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:19,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:19,244 INFO L82 PathProgramCache]: Analyzing trace with hash -429428447, now seen corresponding path program 146 times [2018-09-30 23:27:19,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:19,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:19,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:19,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:27:19,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:27,568 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:27,568 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:27,575 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:27:27,801 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:27:27,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:27,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:27,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:27,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148, 148] total 148 [2018-09-30 23:27:27,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-09-30 23:27:27,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-09-30 23:27:27,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-09-30 23:27:27,863 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 149 states. [2018-09-30 23:27:28,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:28,340 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-30 23:27:28,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-09-30 23:27:28,340 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 149 [2018-09-30 23:27:28,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:28,341 INFO L225 Difference]: With dead ends: 153 [2018-09-30 23:27:28,341 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 23:27:28,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-09-30 23:27:28,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 23:27:28,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-30 23:27:28,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 23:27:28,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-30 23:27:28,345 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 149 [2018-09-30 23:27:28,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:28,345 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-30 23:27:28,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-09-30 23:27:28,345 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-30 23:27:28,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-30 23:27:28,346 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:28,346 INFO L375 BasicCegarLoop]: trace histogram [147, 1, 1, 1] [2018-09-30 23:27:28,346 INFO L423 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:28,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:28,346 INFO L82 PathProgramCache]: Analyzing trace with hash -427381944, now seen corresponding path program 147 times [2018-09-30 23:27:28,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:28,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:28,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:28,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:28,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:36,438 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:36,438 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:36,446 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:27:36,822 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 75 check-sat command(s) [2018-09-30 23:27:36,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:36,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:36,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:36,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149, 149] total 149 [2018-09-30 23:27:36,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-30 23:27:36,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-30 23:27:36,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 23:27:36,883 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 150 states. [2018-09-30 23:27:37,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:37,476 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-09-30 23:27:37,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-09-30 23:27:37,476 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 150 [2018-09-30 23:27:37,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:37,477 INFO L225 Difference]: With dead ends: 154 [2018-09-30 23:27:37,477 INFO L226 Difference]: Without dead ends: 152 [2018-09-30 23:27:37,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 23:27:37,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-30 23:27:37,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-30 23:27:37,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-30 23:27:37,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-09-30 23:27:37,480 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 150 [2018-09-30 23:27:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:37,481 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-09-30 23:27:37,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-30 23:27:37,481 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-09-30 23:27:37,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-30 23:27:37,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:37,482 INFO L375 BasicCegarLoop]: trace histogram [148, 1, 1, 1] [2018-09-30 23:27:37,482 INFO L423 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:37,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:37,482 INFO L82 PathProgramCache]: Analyzing trace with hash -363940351, now seen corresponding path program 148 times [2018-09-30 23:27:37,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:37,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:37,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:37,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:37,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:45,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:45,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:45,594 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:27:45,822 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:27:45,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:45,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:45,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:45,879 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:45,879 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [150, 150] total 150 [2018-09-30 23:27:45,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 151 states [2018-09-30 23:27:45,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2018-09-30 23:27:45,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-09-30 23:27:45,881 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 151 states. [2018-09-30 23:27:46,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:46,589 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-30 23:27:46,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-09-30 23:27:46,590 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 151 [2018-09-30 23:27:46,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:46,590 INFO L225 Difference]: With dead ends: 155 [2018-09-30 23:27:46,591 INFO L226 Difference]: Without dead ends: 153 [2018-09-30 23:27:46,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-09-30 23:27:46,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-30 23:27:46,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-30 23:27:46,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-30 23:27:46,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-30 23:27:46,594 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 151 [2018-09-30 23:27:46,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:46,595 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-30 23:27:46,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 151 states. [2018-09-30 23:27:46,595 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-30 23:27:46,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 23:27:46,595 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:46,595 INFO L375 BasicCegarLoop]: trace histogram [149, 1, 1, 1] [2018-09-30 23:27:46,595 INFO L423 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:46,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:46,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1602749032, now seen corresponding path program 149 times [2018-09-30 23:27:46,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:46,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:46,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:46,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:46,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:55,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:55,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:55,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:55,151 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:27:55,554 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 76 check-sat command(s) [2018-09-30 23:27:55,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:55,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:55,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:55,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 151] total 151 [2018-09-30 23:27:55,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-30 23:27:55,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-30 23:27:55,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 23:27:55,617 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 152 states. [2018-09-30 23:27:56,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:56,224 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2018-09-30 23:27:56,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-09-30 23:27:56,224 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 152 [2018-09-30 23:27:56,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:56,225 INFO L225 Difference]: With dead ends: 156 [2018-09-30 23:27:56,225 INFO L226 Difference]: Without dead ends: 154 [2018-09-30 23:27:56,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 23:27:56,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-30 23:27:56,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-30 23:27:56,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-30 23:27:56,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-09-30 23:27:56,230 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 152 [2018-09-30 23:27:56,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:56,230 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-09-30 23:27:56,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-30 23:27:56,230 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-09-30 23:27:56,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-30 23:27:56,231 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:56,231 INFO L375 BasicCegarLoop]: trace histogram [150, 1, 1, 1] [2018-09-30 23:27:56,231 INFO L423 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:56,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:56,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1854389535, now seen corresponding path program 150 times [2018-09-30 23:27:56,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:56,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:56,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:56,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:56,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 0 proven. 11325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:04,736 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:04,736 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:04,744 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:28:05,161 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 76 check-sat command(s) [2018-09-30 23:28:05,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:05,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 0 proven. 11325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:05,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:05,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [152, 152] total 152 [2018-09-30 23:28:05,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 153 states [2018-09-30 23:28:05,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2018-09-30 23:28:05,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-09-30 23:28:05,226 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 153 states. [2018-09-30 23:28:05,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:05,608 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-30 23:28:05,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2018-09-30 23:28:05,608 INFO L78 Accepts]: Start accepts. Automaton has 153 states. Word has length 153 [2018-09-30 23:28:05,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:05,609 INFO L225 Difference]: With dead ends: 157 [2018-09-30 23:28:05,609 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 23:28:05,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-09-30 23:28:05,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 23:28:05,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 23:28:05,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 23:28:05,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-30 23:28:05,614 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 153 [2018-09-30 23:28:05,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:05,614 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-30 23:28:05,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 153 states. [2018-09-30 23:28:05,615 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-30 23:28:05,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-30 23:28:05,615 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:05,615 INFO L375 BasicCegarLoop]: trace histogram [151, 1, 1, 1] [2018-09-30 23:28:05,615 INFO L423 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:05,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:05,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1651502712, now seen corresponding path program 151 times [2018-09-30 23:28:05,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:05,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:05,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:05,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:05,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:05,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:14,213 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:14,213 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:14,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:28:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:14,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:14,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:14,515 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [153, 153] total 153 [2018-09-30 23:28:14,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-30 23:28:14,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-30 23:28:14,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 23:28:14,517 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 154 states. [2018-09-30 23:28:15,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:15,126 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-09-30 23:28:15,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-09-30 23:28:15,126 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 154 [2018-09-30 23:28:15,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:15,127 INFO L225 Difference]: With dead ends: 158 [2018-09-30 23:28:15,127 INFO L226 Difference]: Without dead ends: 156 [2018-09-30 23:28:15,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 23:28:15,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-30 23:28:15,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-30 23:28:15,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-30 23:28:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-09-30 23:28:15,131 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 154 [2018-09-30 23:28:15,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:15,131 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-09-30 23:28:15,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-30 23:28:15,132 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-09-30 23:28:15,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-30 23:28:15,132 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:15,132 INFO L375 BasicCegarLoop]: trace histogram [152, 1, 1, 1] [2018-09-30 23:28:15,132 INFO L423 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:15,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:15,132 INFO L82 PathProgramCache]: Analyzing trace with hash 343021505, now seen corresponding path program 152 times [2018-09-30 23:28:15,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:15,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:15,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:15,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:28:15,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 0 proven. 11628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:23,963 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:23,963 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:23,970 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:28:24,201 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:28:24,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:24,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 0 proven. 11628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:24,261 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:24,261 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [154, 154] total 154 [2018-09-30 23:28:24,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 155 states [2018-09-30 23:28:24,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2018-09-30 23:28:24,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-09-30 23:28:24,263 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 155 states. [2018-09-30 23:28:24,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:24,949 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-30 23:28:24,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2018-09-30 23:28:24,950 INFO L78 Accepts]: Start accepts. Automaton has 155 states. Word has length 155 [2018-09-30 23:28:24,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:24,951 INFO L225 Difference]: With dead ends: 159 [2018-09-30 23:28:24,951 INFO L226 Difference]: Without dead ends: 157 [2018-09-30 23:28:24,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-09-30 23:28:24,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-30 23:28:24,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-30 23:28:24,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 23:28:24,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-09-30 23:28:24,956 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 155 [2018-09-30 23:28:24,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:24,956 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-09-30 23:28:24,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 155 states. [2018-09-30 23:28:24,957 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-09-30 23:28:24,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-30 23:28:24,957 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:24,957 INFO L375 BasicCegarLoop]: trace histogram [153, 1, 1, 1] [2018-09-30 23:28:24,958 INFO L423 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:24,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:24,958 INFO L82 PathProgramCache]: Analyzing trace with hash 2043730088, now seen corresponding path program 153 times [2018-09-30 23:28:24,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:24,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:24,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:24,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:24,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:33,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:33,997 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:33,997 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:34,004 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:28:34,419 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 78 check-sat command(s) [2018-09-30 23:28:34,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:34,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:34,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:34,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [155, 155] total 155 [2018-09-30 23:28:34,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-30 23:28:34,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-30 23:28:34,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 23:28:34,482 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 156 states. [2018-09-30 23:28:35,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:35,259 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2018-09-30 23:28:35,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-09-30 23:28:35,259 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 156 [2018-09-30 23:28:35,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:35,260 INFO L225 Difference]: With dead ends: 160 [2018-09-30 23:28:35,260 INFO L226 Difference]: Without dead ends: 158 [2018-09-30 23:28:35,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 23:28:35,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-30 23:28:35,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-30 23:28:35,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-30 23:28:35,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-09-30 23:28:35,264 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 156 [2018-09-30 23:28:35,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:35,264 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-09-30 23:28:35,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-30 23:28:35,265 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-09-30 23:28:35,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-30 23:28:35,265 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:35,265 INFO L375 BasicCegarLoop]: trace histogram [154, 1, 1, 1] [2018-09-30 23:28:35,265 INFO L423 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:35,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:35,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1068878687, now seen corresponding path program 154 times [2018-09-30 23:28:35,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:35,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:35,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:35,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:35,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:44,348 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:44,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:44,356 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:28:44,592 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:28:44,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:44,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:44,653 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:44,653 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [156, 156] total 156 [2018-09-30 23:28:44,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 157 states [2018-09-30 23:28:44,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2018-09-30 23:28:44,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-09-30 23:28:44,656 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 157 states. [2018-09-30 23:28:45,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:45,548 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-30 23:28:45,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2018-09-30 23:28:45,549 INFO L78 Accepts]: Start accepts. Automaton has 157 states. Word has length 157 [2018-09-30 23:28:45,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:45,549 INFO L225 Difference]: With dead ends: 161 [2018-09-30 23:28:45,550 INFO L226 Difference]: Without dead ends: 159 [2018-09-30 23:28:45,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-09-30 23:28:45,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-30 23:28:45,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-30 23:28:45,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-30 23:28:45,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-30 23:28:45,554 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 157 [2018-09-30 23:28:45,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:45,554 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-30 23:28:45,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 157 states. [2018-09-30 23:28:45,555 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-30 23:28:45,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-30 23:28:45,555 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:45,555 INFO L375 BasicCegarLoop]: trace histogram [155, 1, 1, 1] [2018-09-30 23:28:45,555 INFO L423 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:45,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:45,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1224497096, now seen corresponding path program 155 times [2018-09-30 23:28:45,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:45,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:45,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:45,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:45,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:54,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:54,566 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:54,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:54,574 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:28:54,990 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2018-09-30 23:28:54,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:54,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:55,054 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:55,054 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [157, 157] total 157 [2018-09-30 23:28:55,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-30 23:28:55,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-30 23:28:55,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 23:28:55,056 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 158 states. [2018-09-30 23:28:55,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:55,825 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2018-09-30 23:28:55,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-09-30 23:28:55,825 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 158 [2018-09-30 23:28:55,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:55,826 INFO L225 Difference]: With dead ends: 162 [2018-09-30 23:28:55,826 INFO L226 Difference]: Without dead ends: 160 [2018-09-30 23:28:55,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 23:28:55,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-30 23:28:55,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-30 23:28:55,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-30 23:28:55,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-09-30 23:28:55,831 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 158 [2018-09-30 23:28:55,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:55,831 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-09-30 23:28:55,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-30 23:28:55,831 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-09-30 23:28:55,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-30 23:28:55,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:55,832 INFO L375 BasicCegarLoop]: trace histogram [156, 1, 1, 1] [2018-09-30 23:28:55,832 INFO L423 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:55,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:55,832 INFO L82 PathProgramCache]: Analyzing trace with hash -695297663, now seen corresponding path program 156 times [2018-09-30 23:28:55,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:55,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:55,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:55,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:55,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:55,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 0 proven. 12246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:05,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:05,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:05,234 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:29:05,638 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-30 23:29:05,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:05,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 0 proven. 12246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:05,701 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:05,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [158, 158] total 158 [2018-09-30 23:29:05,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 159 states [2018-09-30 23:29:05,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2018-09-30 23:29:05,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-09-30 23:29:05,703 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 159 states. [2018-09-30 23:29:06,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:06,417 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-30 23:29:06,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2018-09-30 23:29:06,418 INFO L78 Accepts]: Start accepts. Automaton has 159 states. Word has length 159 [2018-09-30 23:29:06,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:06,418 INFO L225 Difference]: With dead ends: 163 [2018-09-30 23:29:06,418 INFO L226 Difference]: Without dead ends: 161 [2018-09-30 23:29:06,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-09-30 23:29:06,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-30 23:29:06,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-30 23:29:06,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-30 23:29:06,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-09-30 23:29:06,421 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 159 [2018-09-30 23:29:06,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:06,422 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-09-30 23:29:06,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 159 states. [2018-09-30 23:29:06,422 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-09-30 23:29:06,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-30 23:29:06,422 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:06,422 INFO L375 BasicCegarLoop]: trace histogram [157, 1, 1, 1] [2018-09-30 23:29:06,422 INFO L423 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:06,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:06,423 INFO L82 PathProgramCache]: Analyzing trace with hash -79393048, now seen corresponding path program 157 times [2018-09-30 23:29:06,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:06,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:06,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:06,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:06,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:15,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:15,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:15,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:29:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:16,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:16,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:16,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [159, 159] total 159 [2018-09-30 23:29:16,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-30 23:29:16,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-30 23:29:16,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-09-30 23:29:16,186 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 160 states. [2018-09-30 23:29:16,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:16,904 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2018-09-30 23:29:16,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-09-30 23:29:16,905 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 160 [2018-09-30 23:29:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:16,905 INFO L225 Difference]: With dead ends: 164 [2018-09-30 23:29:16,906 INFO L226 Difference]: Without dead ends: 162 [2018-09-30 23:29:16,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-09-30 23:29:16,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-30 23:29:16,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-09-30 23:29:16,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-09-30 23:29:16,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-09-30 23:29:16,908 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 160 [2018-09-30 23:29:16,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:16,909 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-09-30 23:29:16,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-30 23:29:16,909 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-09-30 23:29:16,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-30 23:29:16,909 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:16,909 INFO L375 BasicCegarLoop]: trace histogram [158, 1, 1, 1] [2018-09-30 23:29:16,909 INFO L423 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:16,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:16,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1833780833, now seen corresponding path program 158 times [2018-09-30 23:29:16,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:16,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:16,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:16,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:29:16,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 0 proven. 12561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:26,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:26,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:26,494 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:29:26,736 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:29:26,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:26,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:26,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 0 proven. 12561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:26,799 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:26,800 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [160, 160] total 160 [2018-09-30 23:29:26,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 161 states [2018-09-30 23:29:26,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2018-09-30 23:29:26,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-09-30 23:29:26,802 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 161 states. [2018-09-30 23:29:27,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:27,576 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-30 23:29:27,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2018-09-30 23:29:27,576 INFO L78 Accepts]: Start accepts. Automaton has 161 states. Word has length 161 [2018-09-30 23:29:27,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:27,577 INFO L225 Difference]: With dead ends: 165 [2018-09-30 23:29:27,577 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 23:29:27,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-09-30 23:29:27,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 23:29:27,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-30 23:29:27,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 23:29:27,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-30 23:29:27,580 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 161 [2018-09-30 23:29:27,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:27,580 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-30 23:29:27,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 161 states. [2018-09-30 23:29:27,580 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-30 23:29:27,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 23:29:27,581 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:27,581 INFO L375 BasicCegarLoop]: trace histogram [159, 1, 1, 1] [2018-09-30 23:29:27,581 INFO L423 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:27,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:27,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1012629000, now seen corresponding path program 159 times [2018-09-30 23:29:27,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:27,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:27,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:27,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:27,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:37,118 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:37,118 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:37,125 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:29:37,614 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2018-09-30 23:29:37,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:37,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:37,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:37,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:37,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [161, 161] total 161 [2018-09-30 23:29:37,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-30 23:29:37,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-30 23:29:37,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 23:29:37,681 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 162 states. [2018-09-30 23:29:38,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:38,542 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-09-30 23:29:38,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2018-09-30 23:29:38,542 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 162 [2018-09-30 23:29:38,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:38,543 INFO L225 Difference]: With dead ends: 166 [2018-09-30 23:29:38,543 INFO L226 Difference]: Without dead ends: 164 [2018-09-30 23:29:38,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 23:29:38,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-30 23:29:38,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-30 23:29:38,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-30 23:29:38,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-09-30 23:29:38,547 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 162 [2018-09-30 23:29:38,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:38,548 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-09-30 23:29:38,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-30 23:29:38,548 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-09-30 23:29:38,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-30 23:29:38,548 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:38,548 INFO L375 BasicCegarLoop]: trace histogram [160, 1, 1, 1] [2018-09-30 23:29:38,548 INFO L423 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:38,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:38,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1326725953, now seen corresponding path program 160 times [2018-09-30 23:29:38,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:38,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:38,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:38,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:38,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 12880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:48,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:48,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:48,250 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:29:48,494 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:29:48,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:48,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 12880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:48,557 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:48,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [162, 162] total 162 [2018-09-30 23:29:48,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 163 states [2018-09-30 23:29:48,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2018-09-30 23:29:48,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-09-30 23:29:48,559 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 163 states. [2018-09-30 23:29:49,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:49,544 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-30 23:29:49,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2018-09-30 23:29:49,544 INFO L78 Accepts]: Start accepts. Automaton has 163 states. Word has length 163 [2018-09-30 23:29:49,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:49,545 INFO L225 Difference]: With dead ends: 167 [2018-09-30 23:29:49,545 INFO L226 Difference]: Without dead ends: 165 [2018-09-30 23:29:49,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-09-30 23:29:49,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-30 23:29:49,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-30 23:29:49,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-30 23:29:49,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-09-30 23:29:49,549 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 163 [2018-09-30 23:29:49,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:49,549 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-09-30 23:29:49,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 163 states. [2018-09-30 23:29:49,549 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-09-30 23:29:49,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 23:29:49,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:49,550 INFO L375 BasicCegarLoop]: trace histogram [161, 1, 1, 1] [2018-09-30 23:29:49,550 INFO L423 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:49,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:49,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1821170392, now seen corresponding path program 161 times [2018-09-30 23:29:49,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:49,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:49,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:49,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:49,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:59,520 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:59,520 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:59,528 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:29:59,966 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 82 check-sat command(s) [2018-09-30 23:29:59,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:59,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:00,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:00,033 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [163, 163] total 163 [2018-09-30 23:30:00,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-09-30 23:30:00,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-09-30 23:30:00,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-09-30 23:30:00,035 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 164 states. [2018-09-30 23:30:00,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:00,983 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2018-09-30 23:30:00,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2018-09-30 23:30:00,983 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 164 [2018-09-30 23:30:00,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:00,984 INFO L225 Difference]: With dead ends: 168 [2018-09-30 23:30:00,984 INFO L226 Difference]: Without dead ends: 166 [2018-09-30 23:30:00,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-09-30 23:30:00,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-09-30 23:30:00,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-09-30 23:30:00,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-09-30 23:30:00,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-09-30 23:30:00,989 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 164 [2018-09-30 23:30:00,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:00,989 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-09-30 23:30:00,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-09-30 23:30:00,989 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-09-30 23:30:00,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-09-30 23:30:00,990 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:00,990 INFO L375 BasicCegarLoop]: trace histogram [162, 1, 1, 1] [2018-09-30 23:30:00,990 INFO L423 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:00,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:00,991 INFO L82 PathProgramCache]: Analyzing trace with hash -621709279, now seen corresponding path program 162 times [2018-09-30 23:30:00,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:00,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:00,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:00,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:00,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 0 proven. 13203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:11,045 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:11,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:11,052 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:30:11,516 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 82 check-sat command(s) [2018-09-30 23:30:11,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:11,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:11,560 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 0 proven. 13203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:11,582 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:11,582 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [164, 164] total 164 [2018-09-30 23:30:11,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 165 states [2018-09-30 23:30:11,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2018-09-30 23:30:11,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-09-30 23:30:11,584 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 165 states. [2018-09-30 23:30:12,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:12,489 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-30 23:30:12,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2018-09-30 23:30:12,489 INFO L78 Accepts]: Start accepts. Automaton has 165 states. Word has length 165 [2018-09-30 23:30:12,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:12,490 INFO L225 Difference]: With dead ends: 169 [2018-09-30 23:30:12,490 INFO L226 Difference]: Without dead ends: 167 [2018-09-30 23:30:12,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-09-30 23:30:12,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-30 23:30:12,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-30 23:30:12,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 23:30:12,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-09-30 23:30:12,494 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 165 [2018-09-30 23:30:12,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:12,494 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-09-30 23:30:12,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 165 states. [2018-09-30 23:30:12,494 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-09-30 23:30:12,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-30 23:30:12,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:12,495 INFO L375 BasicCegarLoop]: trace histogram [163, 1, 1, 1] [2018-09-30 23:30:12,495 INFO L423 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:12,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:12,495 INFO L82 PathProgramCache]: Analyzing trace with hash -2093120440, now seen corresponding path program 163 times [2018-09-30 23:30:12,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:12,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:12,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:12,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:12,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:22,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:22,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:22,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:22,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:30:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:22,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:22,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:22,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [165, 165] total 165 [2018-09-30 23:30:22,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-09-30 23:30:22,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-09-30 23:30:22,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-09-30 23:30:22,730 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 166 states. [2018-09-30 23:30:23,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:23,468 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-09-30 23:30:23,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2018-09-30 23:30:23,469 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 166 [2018-09-30 23:30:23,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:23,469 INFO L225 Difference]: With dead ends: 170 [2018-09-30 23:30:23,469 INFO L226 Difference]: Without dead ends: 168 [2018-09-30 23:30:23,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-09-30 23:30:23,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-09-30 23:30:23,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-09-30 23:30:23,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-09-30 23:30:23,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2018-09-30 23:30:23,472 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 166 [2018-09-30 23:30:23,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:23,473 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2018-09-30 23:30:23,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-09-30 23:30:23,473 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2018-09-30 23:30:23,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-09-30 23:30:23,473 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:23,473 INFO L375 BasicCegarLoop]: trace histogram [164, 1, 1, 1] [2018-09-30 23:30:23,474 INFO L423 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:23,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:23,474 INFO L82 PathProgramCache]: Analyzing trace with hash -462226175, now seen corresponding path program 164 times [2018-09-30 23:30:23,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:23,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:23,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:23,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:30:23,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13530 backedges. 0 proven. 13530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:33,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:33,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:33,564 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:30:33,816 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:30:33,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:33,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 13530 backedges. 0 proven. 13530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:33,880 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:33,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [166, 166] total 166 [2018-09-30 23:30:33,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 167 states [2018-09-30 23:30:33,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2018-09-30 23:30:33,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-09-30 23:30:33,882 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 167 states. [2018-09-30 23:30:34,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:34,332 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-09-30 23:30:34,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2018-09-30 23:30:34,333 INFO L78 Accepts]: Start accepts. Automaton has 167 states. Word has length 167 [2018-09-30 23:30:34,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:34,334 INFO L225 Difference]: With dead ends: 171 [2018-09-30 23:30:34,334 INFO L226 Difference]: Without dead ends: 169 [2018-09-30 23:30:34,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-09-30 23:30:34,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-30 23:30:34,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-30 23:30:34,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-30 23:30:34,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-09-30 23:30:34,338 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 167 [2018-09-30 23:30:34,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:34,338 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-09-30 23:30:34,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 167 states. [2018-09-30 23:30:34,338 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-09-30 23:30:34,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-30 23:30:34,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:34,338 INFO L375 BasicCegarLoop]: trace histogram [165, 1, 1, 1] [2018-09-30 23:30:34,339 INFO L423 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:34,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:34,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1444111512, now seen corresponding path program 165 times [2018-09-30 23:30:34,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:34,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:34,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:34,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:34,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:44,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:44,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:44,761 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:30:45,222 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 84 check-sat command(s) [2018-09-30 23:30:45,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:45,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:45,285 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:45,285 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [167, 167] total 167 [2018-09-30 23:30:45,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-09-30 23:30:45,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-09-30 23:30:45,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-09-30 23:30:45,287 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 168 states. [2018-09-30 23:30:46,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:46,168 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2018-09-30 23:30:46,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2018-09-30 23:30:46,169 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 168 [2018-09-30 23:30:46,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:46,169 INFO L225 Difference]: With dead ends: 172 [2018-09-30 23:30:46,170 INFO L226 Difference]: Without dead ends: 170 [2018-09-30 23:30:46,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-09-30 23:30:46,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-09-30 23:30:46,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2018-09-30 23:30:46,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-09-30 23:30:46,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-09-30 23:30:46,174 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 168 [2018-09-30 23:30:46,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:46,174 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-09-30 23:30:46,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-09-30 23:30:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-09-30 23:30:46,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-09-30 23:30:46,175 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:46,175 INFO L375 BasicCegarLoop]: trace histogram [166, 1, 1, 1] [2018-09-30 23:30:46,175 INFO L423 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:46,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:46,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1817785887, now seen corresponding path program 166 times [2018-09-30 23:30:46,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:46,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:46,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:46,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:46,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 13861 backedges. 0 proven. 13861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:56,630 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:56,630 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:56,638 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:30:56,895 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:30:56,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:56,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:56,940 INFO L134 CoverageAnalysis]: Checked inductivity of 13861 backedges. 0 proven. 13861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:56,961 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:56,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [168, 168] total 168 [2018-09-30 23:30:56,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 169 states [2018-09-30 23:30:56,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2018-09-30 23:30:56,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-09-30 23:30:56,964 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand 169 states. [2018-09-30 23:30:57,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:57,979 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-30 23:30:57,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2018-09-30 23:30:57,979 INFO L78 Accepts]: Start accepts. Automaton has 169 states. Word has length 169 [2018-09-30 23:30:57,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:57,980 INFO L225 Difference]: With dead ends: 173 [2018-09-30 23:30:57,980 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 23:30:57,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-09-30 23:30:57,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 23:30:57,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-30 23:30:57,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 23:30:57,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-09-30 23:30:57,983 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 169 [2018-09-30 23:30:57,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:57,983 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-09-30 23:30:57,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 169 states. [2018-09-30 23:30:57,983 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-09-30 23:30:57,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 23:30:57,984 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:57,984 INFO L375 BasicCegarLoop]: trace histogram [167, 1, 1, 1] [2018-09-30 23:30:57,984 INFO L423 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:57,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:57,984 INFO L82 PathProgramCache]: Analyzing trace with hash -516789624, now seen corresponding path program 167 times [2018-09-30 23:30:57,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:57,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:57,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:57,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:57,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:08,602 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:08,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:08,603 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:08,610 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:31:09,082 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-09-30 23:31:09,083 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:09,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:09,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:09,155 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [169, 169] total 169 [2018-09-30 23:31:09,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-09-30 23:31:09,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-09-30 23:31:09,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14365, Invalid=14365, Unknown=0, NotChecked=0, Total=28730 [2018-09-30 23:31:09,157 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 170 states. [2018-09-30 23:31:09,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:09,854 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2018-09-30 23:31:09,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2018-09-30 23:31:09,854 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 170 [2018-09-30 23:31:09,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:09,855 INFO L225 Difference]: With dead ends: 174 [2018-09-30 23:31:09,855 INFO L226 Difference]: Without dead ends: 172 [2018-09-30 23:31:09,856 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=14365, Invalid=14365, Unknown=0, NotChecked=0, Total=28730 [2018-09-30 23:31:09,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-09-30 23:31:09,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-09-30 23:31:09,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-09-30 23:31:09,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-09-30 23:31:09,859 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 170 [2018-09-30 23:31:09,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:09,860 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-09-30 23:31:09,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-09-30 23:31:09,860 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-09-30 23:31:09,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-09-30 23:31:09,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:09,860 INFO L375 BasicCegarLoop]: trace histogram [168, 1, 1, 1] [2018-09-30 23:31:09,860 INFO L423 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:09,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:09,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1159388865, now seen corresponding path program 168 times [2018-09-30 23:31:09,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:09,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:09,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:09,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:09,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 14196 backedges. 0 proven. 14196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:20,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:20,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:20,492 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:31:20,950 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-30 23:31:20,950 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:20,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 14196 backedges. 0 proven. 14196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:21,019 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:21,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [170, 170] total 170 [2018-09-30 23:31:21,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 171 states [2018-09-30 23:31:21,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2018-09-30 23:31:21,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14535, Invalid=14535, Unknown=0, NotChecked=0, Total=29070 [2018-09-30 23:31:21,022 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 171 states. [2018-09-30 23:31:21,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:21,687 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-09-30 23:31:21,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2018-09-30 23:31:21,687 INFO L78 Accepts]: Start accepts. Automaton has 171 states. Word has length 171 [2018-09-30 23:31:21,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:21,688 INFO L225 Difference]: With dead ends: 175 [2018-09-30 23:31:21,688 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 23:31:21,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=14535, Invalid=14535, Unknown=0, NotChecked=0, Total=29070 [2018-09-30 23:31:21,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 23:31:21,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-30 23:31:21,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-30 23:31:21,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-09-30 23:31:21,691 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 171 [2018-09-30 23:31:21,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:21,691 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-09-30 23:31:21,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 171 states. [2018-09-30 23:31:21,691 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-09-30 23:31:21,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-30 23:31:21,692 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:21,692 INFO L375 BasicCegarLoop]: trace histogram [169, 1, 1, 1] [2018-09-30 23:31:21,692 INFO L423 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:21,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:21,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1581314472, now seen corresponding path program 169 times [2018-09-30 23:31:21,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:21,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:21,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:21,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:21,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:21,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:32,271 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:32,271 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:32,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:31:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:32,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:32,584 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:32,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:32,607 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [171, 171] total 171 [2018-09-30 23:31:32,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-09-30 23:31:32,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-09-30 23:31:32,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14706, Invalid=14706, Unknown=0, NotChecked=0, Total=29412 [2018-09-30 23:31:32,609 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 172 states. [2018-09-30 23:31:33,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:33,689 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2018-09-30 23:31:33,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2018-09-30 23:31:33,689 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 172 [2018-09-30 23:31:33,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:33,690 INFO L225 Difference]: With dead ends: 176 [2018-09-30 23:31:33,690 INFO L226 Difference]: Without dead ends: 174 [2018-09-30 23:31:33,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=14706, Invalid=14706, Unknown=0, NotChecked=0, Total=29412 [2018-09-30 23:31:33,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-09-30 23:31:33,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-09-30 23:31:33,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-09-30 23:31:33,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2018-09-30 23:31:33,693 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 172 [2018-09-30 23:31:33,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:33,693 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2018-09-30 23:31:33,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-09-30 23:31:33,693 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2018-09-30 23:31:33,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-30 23:31:33,694 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:33,694 INFO L375 BasicCegarLoop]: trace histogram [170, 1, 1, 1] [2018-09-30 23:31:33,694 INFO L423 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:33,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:33,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1776106401, now seen corresponding path program 170 times [2018-09-30 23:31:33,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:33,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:33,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:33,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:31:33,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-30 23:31:44,114 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 23:31:44,118 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 23:31:44,118 INFO L202 PluginConnector]: Adding new model count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 11:31:44 BoogieIcfgContainer [2018-09-30 23:31:44,118 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 23:31:44,119 INFO L168 Benchmark]: Toolchain (without parser) took 754422.50 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -34.1 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 344.7 MB). Peak memory consumption was 310.6 MB. Max. memory is 7.1 GB. [2018-09-30 23:31:44,120 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 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. [2018-09-30 23:31:44,120 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.73 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. [2018-09-30 23:31:44,120 INFO L168 Benchmark]: Boogie Preprocessor took 23.88 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. [2018-09-30 23:31:44,121 INFO L168 Benchmark]: RCFGBuilder took 307.30 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 23:31:44,121 INFO L168 Benchmark]: TraceAbstraction took 754043.62 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -34.1 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 323.6 MB). Peak memory consumption was 289.5 MB. Max. memory is 7.1 GB. [2018-09-30 23:31:44,123 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 0.16 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 41.73 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 23.88 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 307.30 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 754043.62 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -34.1 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 323.6 MB). Peak memory consumption was 289.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 43]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 43). Cancelled while BasicCegarLoop was analyzing trace of length 174 with TraceHistMax 170, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 168 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 753.9s OverallTime, 171 OverallIterations, 170 TraceHistogramMax, 55.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 510 SDtfs, 0 SDslu, 8875 SDs, 0 SdLazy, 23580 SolverSat, 325 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 28.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29408 GetRequests, 14873 SyntacticMatches, 0 SemanticMatches, 14535 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 635.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=174occurred in iteration=170, 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: 0.5s AutomataMinimizationTime, 170 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 4.4s SsaConstructionTime, 29.2s SatisfiabilityAnalysisTime, 645.8s InterpolantComputationTime, 29747 NumberOfCodeBlocks, 29747 NumberOfCodeBlocksAsserted, 4021 NumberOfCheckSat, 29408 ConstructedInterpolants, 0 QuantifiedInterpolants, 10029482 SizeOfPredicates, 170 NumberOfNonLiveVariables, 160550 ConjunctsInSsa, 14704 ConjunctsInUnsatCore, 339 InterpolantComputations, 1 PerfectInterpolantSequences, 0/1637610 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.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_23-31-44-132.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_23-31-44-132.csv Completed graceful shutdown