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_k.i_3.bplTransformedIcfg_BEv2_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b2fde6a [2018-09-28 09:59:30,612 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 09:59:30,614 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 09:59:30,631 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 09:59:30,632 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 09:59:30,634 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 09:59:30,635 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 09:59:30,638 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 09:59:30,641 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 09:59:30,642 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 09:59:30,644 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-28 09:59:30,644 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-28 09:59:30,645 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-28 09:59:30,647 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-28 09:59:30,654 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-28 09:59:30,655 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-28 09:59:30,658 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-28 09:59:30,663 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-28 09:59:30,665 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-28 09:59:30,669 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-28 09:59:30,672 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-28 09:59:30,673 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-28 09:59:30,676 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-28 09:59:30,688 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-28 09:59:30,718 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 09:59:30,718 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 09:59:30,720 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 09:59:30,720 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 09:59:30,723 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 09:59:30,723 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 09:59:30,723 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 09:59:30,724 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 09:59:30,724 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 09:59:30,724 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 09:59:30,724 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 09:59:30,724 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 09:59:30,725 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 09:59:30,725 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 09:59:30,725 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 09:59:30,725 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 09:59:30,726 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 09:59:30,726 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 09:59:30,727 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 09:59:30,727 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 09:59:30,727 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 09:59:30,727 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 09:59:30,728 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 09:59:30,728 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 09:59:30,728 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 09:59:30,728 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 09:59:30,729 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 09:59:30,729 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 09:59:30,729 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 09:59:30,729 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 09:59:30,788 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 09:59:30,804 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 09:59:30,810 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 09:59:30,811 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 09:59:30,812 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 09:59:30,813 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-09-28 09:59:30,813 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl' [2018-09-28 09:59:30,866 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 09:59:30,870 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 09:59:30,871 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 09:59:30,871 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 09:59:30,871 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 09:59:30,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:59:30" (1/1) ... [2018-09-28 09:59:30,903 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:59:30" (1/1) ... [2018-09-28 09:59:30,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 09:59:30,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 09:59:30,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 09:59:30,913 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 09:59:30,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:59:30" (1/1) ... [2018-09-28 09:59:30,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:59:30" (1/1) ... [2018-09-28 09:59:30,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:59:30" (1/1) ... [2018-09-28 09:59:30,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:59:30" (1/1) ... [2018-09-28 09:59:30,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:59:30" (1/1) ... [2018-09-28 09:59:30,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:59:30" (1/1) ... [2018-09-28 09:59:30,932 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:59:30" (1/1) ... [2018-09-28 09:59:30,934 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 09:59:30,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 09:59:30,935 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 09:59:30,935 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 09:59:30,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:59:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 09:59:31,012 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-28 09:59:31,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-28 09:59:31,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-28 09:59:31,188 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-28 09:59:31,188 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 09:59:31 BoogieIcfgContainer [2018-09-28 09:59:31,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 09:59:31,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 09:59:31,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 09:59:31,194 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 09:59:31,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:59:30" (1/2) ... [2018-09-28 09:59:31,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9060b85 and model type count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 09:59:31, skipping insertion in model container [2018-09-28 09:59:31,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 09:59:31" (2/2) ... [2018-09-28 09:59:31,198 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-09-28 09:59:31,207 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 09:59:31,220 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-28 09:59:31,279 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 09:59:31,280 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 09:59:31,280 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 09:59:31,280 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 09:59:31,280 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 09:59:31,282 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 09:59:31,282 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 09:59:31,283 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 09:59:31,283 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 09:59:31,301 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-28 09:59:31,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-28 09:59:31,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:31,317 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-28 09:59:31,318 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:31,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:31,325 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-09-28 09:59:31,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:31,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:31,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:31,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:31,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:31,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:31,507 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 09:59:31,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-28 09:59:31,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 09:59:31,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 09:59:31,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-28 09:59:31,529 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-28 09:59:31,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:31,589 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-28 09:59:31,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 09:59:31,591 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-28 09:59:31,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:31,603 INFO L225 Difference]: With dead ends: 9 [2018-09-28 09:59:31,603 INFO L226 Difference]: Without dead ends: 5 [2018-09-28 09:59:31,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-28 09:59:31,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-28 09:59:31,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-28 09:59:31,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-28 09:59:31,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-28 09:59:31,683 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-28 09:59:31,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:31,684 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-28 09:59:31,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 09:59:31,684 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-28 09:59:31,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-28 09:59:31,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:31,685 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-28 09:59:31,685 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:31,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:31,686 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-09-28 09:59:31,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:31,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:31,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:31,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:31,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:31,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:31,786 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:31,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:31,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:31,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:32,057 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:32,057 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2018-09-28 09:59:32,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 09:59:32,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 09:59:32,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-28 09:59:32,060 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-09-28 09:59:32,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:32,128 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-28 09:59:32,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 09:59:32,130 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-28 09:59:32,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:32,131 INFO L225 Difference]: With dead ends: 9 [2018-09-28 09:59:32,131 INFO L226 Difference]: Without dead ends: 7 [2018-09-28 09:59:32,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-28 09:59:32,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-28 09:59:32,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-28 09:59:32,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-28 09:59:32,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-28 09:59:32,137 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-28 09:59:32,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:32,137 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-28 09:59:32,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 09:59:32,138 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-28 09:59:32,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-28 09:59:32,139 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:32,139 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-28 09:59:32,140 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:32,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:32,140 INFO L82 PathProgramCache]: Analyzing trace with hash 892275272, now seen corresponding path program 2 times [2018-09-28 09:59:32,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:32,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:32,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:32,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:32,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:32,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:32,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:32,329 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 09:59:32,338 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 09:59:32,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:32,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:32,438 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:32,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-09-28 09:59:32,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 09:59:32,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 09:59:32,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-09-28 09:59:32,439 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-09-28 09:59:32,779 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 9 [2018-09-28 09:59:32,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:32,861 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-28 09:59:32,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 09:59:32,861 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-09-28 09:59:32,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:32,862 INFO L225 Difference]: With dead ends: 11 [2018-09-28 09:59:32,862 INFO L226 Difference]: Without dead ends: 9 [2018-09-28 09:59:32,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-28 09:59:32,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-28 09:59:32,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-28 09:59:32,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-28 09:59:32,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-28 09:59:32,867 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-28 09:59:32,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:32,867 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-28 09:59:32,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 09:59:32,867 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-28 09:59:32,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 09:59:32,868 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:32,868 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-28 09:59:32,869 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:32,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:32,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1516986008, now seen corresponding path program 3 times [2018-09-28 09:59:32,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:32,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:32,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:32,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:32,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:33,017 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:33,018 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 [2018-09-28 09:59:33,027 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 09:59:33,043 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-28 09:59:33,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:33,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:33,101 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:33,102 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-09-28 09:59:33,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 09:59:33,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 09:59:33,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-09-28 09:59:33,103 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-09-28 09:59:33,220 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 8 [2018-09-28 09:59:33,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:33,469 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-28 09:59:33,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 09:59:33,470 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-09-28 09:59:33,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:33,470 INFO L225 Difference]: With dead ends: 13 [2018-09-28 09:59:33,470 INFO L226 Difference]: Without dead ends: 11 [2018-09-28 09:59:33,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-09-28 09:59:33,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-28 09:59:33,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-28 09:59:33,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-28 09:59:33,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-28 09:59:33,475 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-28 09:59:33,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:33,476 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-28 09:59:33,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 09:59:33,476 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-28 09:59:33,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-28 09:59:33,476 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:33,477 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-28 09:59:33,477 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:33,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:33,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1829703544, now seen corresponding path program 4 times [2018-09-28 09:59:33,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:33,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:33,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:33,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:33,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:33,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:34,132 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:34,132 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:34,132 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:34,140 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 09:59:34,150 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 09:59:34,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:34,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:34,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:34,271 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-09-28 09:59:34,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 09:59:34,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 09:59:34,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-09-28 09:59:34,273 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-09-28 09:59:34,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:34,531 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-09-28 09:59:34,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 09:59:34,531 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-09-28 09:59:34,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:34,532 INFO L225 Difference]: With dead ends: 15 [2018-09-28 09:59:34,532 INFO L226 Difference]: Without dead ends: 13 [2018-09-28 09:59:34,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-09-28 09:59:34,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-28 09:59:34,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-28 09:59:34,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-28 09:59:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-28 09:59:34,537 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-28 09:59:34,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:34,537 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-28 09:59:34,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 09:59:34,538 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-28 09:59:34,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-28 09:59:34,538 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:34,539 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-28 09:59:34,539 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:34,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:34,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1703544920, now seen corresponding path program 5 times [2018-09-28 09:59:34,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:34,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:34,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:34,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:34,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:35,014 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:35,015 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:35,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:35,031 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 09:59:35,044 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-28 09:59:35,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:35,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:35,096 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:35,116 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:35,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-09-28 09:59:35,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 09:59:35,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 09:59:35,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2018-09-28 09:59:35,119 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-09-28 09:59:35,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:35,544 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-28 09:59:35,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 09:59:35,545 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-09-28 09:59:35,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:35,546 INFO L225 Difference]: With dead ends: 17 [2018-09-28 09:59:35,546 INFO L226 Difference]: Without dead ends: 15 [2018-09-28 09:59:35,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-09-28 09:59:35,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-28 09:59:35,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-28 09:59:35,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-28 09:59:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-28 09:59:35,551 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-28 09:59:35,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:35,552 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-28 09:59:35,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 09:59:35,552 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-28 09:59:35,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 09:59:35,553 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:35,553 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-28 09:59:35,553 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:35,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:35,553 INFO L82 PathProgramCache]: Analyzing trace with hash -724191544, now seen corresponding path program 6 times [2018-09-28 09:59:35,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:35,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:35,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:35,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:35,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:35,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:35,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:35,891 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 09:59:35,913 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 09:59:35,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:35,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:35,965 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:35,987 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:35,987 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-09-28 09:59:35,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 09:59:35,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 09:59:35,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2018-09-28 09:59:35,989 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-09-28 09:59:36,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:36,573 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-09-28 09:59:36,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 09:59:36,575 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-28 09:59:36,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:36,576 INFO L225 Difference]: With dead ends: 19 [2018-09-28 09:59:36,576 INFO L226 Difference]: Without dead ends: 17 [2018-09-28 09:59:36,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-09-28 09:59:36,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-28 09:59:36,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-28 09:59:36,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-28 09:59:36,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-28 09:59:36,581 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-28 09:59:36,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:36,582 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-28 09:59:36,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 09:59:36,582 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-28 09:59:36,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-28 09:59:36,582 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:36,583 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-28 09:59:36,583 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:36,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:36,583 INFO L82 PathProgramCache]: Analyzing trace with hash -163435032, now seen corresponding path program 7 times [2018-09-28 09:59:36,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:36,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:36,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:36,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:36,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:37,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:37,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:37,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:37,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:37,198 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:37,198 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-09-28 09:59:37,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 09:59:37,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 09:59:37,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2018-09-28 09:59:37,200 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-09-28 09:59:37,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:37,870 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-28 09:59:37,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 09:59:37,871 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-09-28 09:59:37,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:37,872 INFO L225 Difference]: With dead ends: 21 [2018-09-28 09:59:37,872 INFO L226 Difference]: Without dead ends: 19 [2018-09-28 09:59:37,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-09-28 09:59:37,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-28 09:59:37,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-28 09:59:37,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-28 09:59:37,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-28 09:59:37,879 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-28 09:59:37,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:37,880 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-28 09:59:37,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 09:59:37,880 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-28 09:59:37,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:59:37,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:37,881 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-28 09:59:37,881 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:37,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:37,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1852661000, now seen corresponding path program 8 times [2018-09-28 09:59:37,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:37,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:37,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:37,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:37,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:38,154 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:38,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:38,165 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 09:59:38,184 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 09:59:38,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:38,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:38,252 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:38,281 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:38,281 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-09-28 09:59:38,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-28 09:59:38,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-28 09:59:38,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2018-09-28 09:59:38,282 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-09-28 09:59:38,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:38,947 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-09-28 09:59:38,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 09:59:38,947 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-09-28 09:59:38,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:38,948 INFO L225 Difference]: With dead ends: 23 [2018-09-28 09:59:38,948 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 09:59:38,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 09:59:38,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 09:59:38,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-28 09:59:38,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-28 09:59:38,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-28 09:59:38,955 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-28 09:59:38,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:38,955 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-28 09:59:38,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-28 09:59:38,955 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-28 09:59:38,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-28 09:59:38,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:38,956 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-28 09:59:38,957 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:38,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:38,957 INFO L82 PathProgramCache]: Analyzing trace with hash -2004270040, now seen corresponding path program 9 times [2018-09-28 09:59:38,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:38,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:38,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:38,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:38,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:39,304 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:39,304 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:39,304 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:39,312 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 09:59:39,326 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-28 09:59:39,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:39,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:39,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:39,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-09-28 09:59:39,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-28 09:59:39,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-28 09:59:39,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2018-09-28 09:59:39,466 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-09-28 09:59:40,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:40,404 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-28 09:59:40,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 09:59:40,404 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-09-28 09:59:40,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:40,405 INFO L225 Difference]: With dead ends: 25 [2018-09-28 09:59:40,405 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 09:59:40,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-09-28 09:59:40,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 09:59:40,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-28 09:59:40,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-28 09:59:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-28 09:59:40,412 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-28 09:59:40,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:40,412 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-28 09:59:40,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-28 09:59:40,412 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-28 09:59:40,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 09:59:40,413 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:40,413 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-28 09:59:40,413 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:40,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:40,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1958223032, now seen corresponding path program 10 times [2018-09-28 09:59:40,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:40,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:40,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:40,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:40,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:41,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:41,051 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:41,060 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 09:59:41,085 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 09:59:41,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:41,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:41,148 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:41,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:41,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-09-28 09:59:41,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-28 09:59:41,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-28 09:59:41,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2018-09-28 09:59:41,180 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-09-28 09:59:41,711 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 11 [2018-09-28 09:59:42,131 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 11 [2018-09-28 09:59:42,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:42,577 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-09-28 09:59:42,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 09:59:42,578 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-09-28 09:59:42,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:42,579 INFO L225 Difference]: With dead ends: 27 [2018-09-28 09:59:42,579 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 09:59:42,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-09-28 09:59:42,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 09:59:42,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-28 09:59:42,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-28 09:59:42,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-28 09:59:42,584 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-28 09:59:42,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:42,585 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-28 09:59:42,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-28 09:59:42,585 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-28 09:59:42,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-28 09:59:42,585 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:42,586 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-28 09:59:42,586 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:42,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:42,586 INFO L82 PathProgramCache]: Analyzing trace with hash -656721304, now seen corresponding path program 11 times [2018-09-28 09:59:42,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:42,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:42,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:42,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:42,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:42,993 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:42,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:43,001 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 09:59:43,036 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-28 09:59:43,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:43,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:43,201 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:43,201 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-09-28 09:59:43,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-28 09:59:43,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-28 09:59:43,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2018-09-28 09:59:43,203 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-09-28 09:59:44,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:44,218 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-28 09:59:44,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 09:59:44,219 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-09-28 09:59:44,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:44,220 INFO L225 Difference]: With dead ends: 29 [2018-09-28 09:59:44,220 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 09:59:44,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-09-28 09:59:44,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 09:59:44,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-28 09:59:44,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-28 09:59:44,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-28 09:59:44,226 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-28 09:59:44,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:44,227 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-28 09:59:44,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-28 09:59:44,227 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-28 09:59:44,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-28 09:59:44,228 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:44,228 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-28 09:59:44,228 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:44,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:44,228 INFO L82 PathProgramCache]: Analyzing trace with hash 250956168, now seen corresponding path program 12 times [2018-09-28 09:59:44,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:44,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:44,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:44,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:44,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:44,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:44,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:44,656 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 09:59:44,810 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-28 09:59:44,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:44,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:44,983 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:44,983 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-09-28 09:59:44,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-28 09:59:44,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-28 09:59:44,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2018-09-28 09:59:44,985 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-09-28 09:59:46,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:46,400 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-09-28 09:59:46,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 09:59:46,400 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-09-28 09:59:46,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:46,401 INFO L225 Difference]: With dead ends: 31 [2018-09-28 09:59:46,401 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 09:59:46,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-09-28 09:59:46,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 09:59:46,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-28 09:59:46,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-28 09:59:46,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-28 09:59:46,407 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-28 09:59:46,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:46,408 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-28 09:59:46,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-28 09:59:46,408 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-28 09:59:46,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-28 09:59:46,409 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:46,409 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-28 09:59:46,409 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:46,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:46,410 INFO L82 PathProgramCache]: Analyzing trace with hash 650645672, now seen corresponding path program 13 times [2018-09-28 09:59:46,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:46,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:46,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:46,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:46,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:46,852 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:46,852 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:46,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:46,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:46,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:47,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:47,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-09-28 09:59:47,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-28 09:59:47,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-28 09:59:47,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2018-09-28 09:59:47,065 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-09-28 09:59:47,374 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 11 [2018-09-28 09:59:48,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:48,674 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-28 09:59:48,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 09:59:48,675 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-09-28 09:59:48,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:48,675 INFO L225 Difference]: With dead ends: 33 [2018-09-28 09:59:48,675 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 09:59:48,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-09-28 09:59:48,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 09:59:48,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-28 09:59:48,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-28 09:59:48,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-28 09:59:48,681 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-28 09:59:48,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:48,682 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-28 09:59:48,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-28 09:59:48,682 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-28 09:59:48,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-28 09:59:48,683 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:48,683 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-28 09:59:48,683 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:48,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:48,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1794797624, now seen corresponding path program 14 times [2018-09-28 09:59:48,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:48,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:48,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:48,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:48,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:49,262 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:49,262 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:49,262 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:49,273 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 09:59:49,327 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 09:59:49,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:49,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:49,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:49,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-09-28 09:59:49,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-28 09:59:49,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-28 09:59:49,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2018-09-28 09:59:49,547 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-09-28 09:59:50,550 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 11 [2018-09-28 09:59:51,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:51,505 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-09-28 09:59:51,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-28 09:59:51,505 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-09-28 09:59:51,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:51,506 INFO L225 Difference]: With dead ends: 35 [2018-09-28 09:59:51,507 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 09:59:51,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-09-28 09:59:51,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 09:59:51,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-28 09:59:51,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-28 09:59:51,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-28 09:59:51,516 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-28 09:59:51,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:51,516 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-28 09:59:51,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-28 09:59:51,516 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-28 09:59:51,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-28 09:59:51,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:51,517 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-28 09:59:51,517 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:51,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:51,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1776273128, now seen corresponding path program 15 times [2018-09-28 09:59:51,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:51,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:51,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:51,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:51,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:51,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:52,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:52,414 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:52,423 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 09:59:52,448 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-28 09:59:52,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:52,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:52,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:52,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-09-28 09:59:52,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-28 09:59:52,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-28 09:59:52,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2018-09-28 09:59:52,580 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-09-28 09:59:54,846 WARN L178 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 11 [2018-09-28 09:59:55,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:55,281 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-28 09:59:55,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-28 09:59:55,282 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-09-28 09:59:55,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:55,283 INFO L225 Difference]: With dead ends: 37 [2018-09-28 09:59:55,283 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 09:59:55,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-09-28 09:59:55,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 09:59:55,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-28 09:59:55,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-28 09:59:55,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-28 09:59:55,290 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-28 09:59:55,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:55,290 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-28 09:59:55,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-28 09:59:55,290 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-28 09:59:55,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-28 09:59:55,291 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:55,291 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-28 09:59:55,292 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:55,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:55,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1896396296, now seen corresponding path program 16 times [2018-09-28 09:59:55,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:55,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:55,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:55,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:55,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:56,153 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:56,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:56,161 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 09:59:56,222 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 09:59:56,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:56,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:56,351 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:56,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:56,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-09-28 09:59:56,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-28 09:59:56,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-28 09:59:56,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2018-09-28 09:59:56,373 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-09-28 09:59:58,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:58,562 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-09-28 09:59:58,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 09:59:58,563 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-09-28 09:59:58,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:58,563 INFO L225 Difference]: With dead ends: 39 [2018-09-28 09:59:58,564 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 09:59:58,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-09-28 09:59:58,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 09:59:58,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-28 09:59:58,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-28 09:59:58,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-28 09:59:58,571 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-28 09:59:58,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:58,571 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-28 09:59:58,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-28 09:59:58,571 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-28 09:59:58,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-28 09:59:58,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:58,572 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-28 09:59:58,572 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:58,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:58,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1370643752, now seen corresponding path program 17 times [2018-09-28 09:59:58,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:58,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:58,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:58,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:58,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:58,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:59,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:59,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:59,351 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 09:59:59,410 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-28 09:59:59,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:59,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:59,493 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:59,513 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:59,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-09-28 09:59:59,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-28 09:59:59,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-28 09:59:59,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2018-09-28 09:59:59,515 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-09-28 10:00:02,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:02,187 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-28 10:00:02,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-28 10:00:02,188 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-09-28 10:00:02,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:02,188 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:00:02,188 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:00:02,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-09-28 10:00:02,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:00:02,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-28 10:00:02,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-28 10:00:02,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-28 10:00:02,196 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-28 10:00:02,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:02,197 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-28 10:00:02,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-28 10:00:02,197 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-28 10:00:02,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-28 10:00:02,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:02,198 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-28 10:00:02,198 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:02,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:02,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1366377400, now seen corresponding path program 18 times [2018-09-28 10:00:02,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:02,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:02,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:02,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:02,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:03,097 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:03,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:03,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:03,105 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:00:03,129 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-28 10:00:03,129 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:03,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:03,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:03,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-09-28 10:00:03,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-28 10:00:03,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-28 10:00:03,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2018-09-28 10:00:03,239 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-09-28 10:00:06,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:06,069 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-09-28 10:00:06,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-28 10:00:06,070 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-09-28 10:00:06,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:06,070 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:00:06,071 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:00:06,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-09-28 10:00:06,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:00:06,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-28 10:00:06,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-28 10:00:06,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-28 10:00:06,083 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-28 10:00:06,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:06,083 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-28 10:00:06,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-28 10:00:06,083 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-28 10:00:06,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-28 10:00:06,084 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:06,084 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-28 10:00:06,084 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:06,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:06,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1171247976, now seen corresponding path program 19 times [2018-09-28 10:00:06,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:06,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:06,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:06,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:06,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:07,128 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:07,128 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:07,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:07,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:07,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:07,375 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-09-28 10:00:07,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-28 10:00:07,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-28 10:00:07,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2018-09-28 10:00:07,376 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-09-28 10:00:10,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:10,531 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-28 10:00:10,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-28 10:00:10,531 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-09-28 10:00:10,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:10,532 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:00:10,532 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:00:10,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-09-28 10:00:10,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:00:10,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-28 10:00:10,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-28 10:00:10,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-28 10:00:10,540 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-28 10:00:10,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:10,540 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-28 10:00:10,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-28 10:00:10,540 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-28 10:00:10,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-28 10:00:10,541 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:10,541 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-28 10:00:10,542 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:10,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:10,542 INFO L82 PathProgramCache]: Analyzing trace with hash 287810184, now seen corresponding path program 20 times [2018-09-28 10:00:10,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:10,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:10,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:10,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:10,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:11,824 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:11,824 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:11,834 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:00:11,935 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:00:11,935 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:11,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:12,082 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:12,082 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-09-28 10:00:12,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-28 10:00:12,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-28 10:00:12,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2018-09-28 10:00:12,084 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-09-28 10:00:15,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:15,576 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-09-28 10:00:15,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-28 10:00:15,577 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-09-28 10:00:15,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:15,578 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:00:15,578 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:00:15,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-09-28 10:00:15,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:00:15,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-28 10:00:15,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-28 10:00:15,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-28 10:00:15,588 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-28 10:00:15,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:15,588 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-28 10:00:15,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-28 10:00:15,588 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-28 10:00:15,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-28 10:00:15,589 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:15,589 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-28 10:00:15,589 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:15,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:15,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1707616680, now seen corresponding path program 21 times [2018-09-28 10:00:15,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:15,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:15,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:15,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:15,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:17,635 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:17,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:17,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:17,647 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:00:17,687 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-28 10:00:17,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:17,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:17,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:17,782 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-09-28 10:00:17,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-28 10:00:17,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-28 10:00:17,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2018-09-28 10:00:17,783 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-09-28 10:00:22,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:22,154 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-28 10:00:22,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-28 10:00:22,156 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-09-28 10:00:22,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:22,157 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:00:22,157 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:00:22,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-09-28 10:00:22,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:00:22,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-28 10:00:22,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-28 10:00:22,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-28 10:00:22,164 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-28 10:00:22,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:22,164 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-28 10:00:22,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-28 10:00:22,164 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-28 10:00:22,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-28 10:00:22,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:22,165 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-28 10:00:22,165 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:22,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:22,165 INFO L82 PathProgramCache]: Analyzing trace with hash 342059208, now seen corresponding path program 22 times [2018-09-28 10:00:22,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:22,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:22,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:22,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:22,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:23,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:23,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:23,997 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:00:24,131 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:00:24,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:24,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:24,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:24,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-09-28 10:00:24,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-28 10:00:24,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-28 10:00:24,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2018-09-28 10:00:24,309 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-09-28 10:00:28,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:28,726 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-09-28 10:00:28,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-28 10:00:28,726 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-09-28 10:00:28,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:28,727 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:00:28,727 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:00:28,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-09-28 10:00:28,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:00:28,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-28 10:00:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-28 10:00:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-28 10:00:28,734 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-28 10:00:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:28,735 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-28 10:00:28,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-28 10:00:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-28 10:00:28,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-28 10:00:28,735 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:28,735 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-28 10:00:28,736 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:28,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:28,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1993646104, now seen corresponding path program 23 times [2018-09-28 10:00:28,736 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:28,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:28,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:28,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:28,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:30,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:30,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:30,165 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:00:30,296 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-28 10:00:30,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:30,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:30,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:30,412 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-09-28 10:00:30,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-28 10:00:30,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-28 10:00:30,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2018-09-28 10:00:30,413 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-09-28 10:00:35,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:35,295 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-28 10:00:35,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-28 10:00:35,297 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-09-28 10:00:35,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:35,297 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:00:35,297 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:00:35,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-09-28 10:00:35,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:00:35,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-28 10:00:35,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-28 10:00:35,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-28 10:00:35,304 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-28 10:00:35,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:35,305 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-28 10:00:35,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-28 10:00:35,305 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-28 10:00:35,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-28 10:00:35,306 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:35,306 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-28 10:00:35,306 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:35,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:35,306 INFO L82 PathProgramCache]: Analyzing trace with hash -338555128, now seen corresponding path program 24 times [2018-09-28 10:00:35,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:35,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:35,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:35,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:35,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:35,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:36,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:36,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:36,619 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:00:36,652 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-28 10:00:36,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:36,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:37,295 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:37,295 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-09-28 10:00:37,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-28 10:00:37,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-28 10:00:37,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2450, Unknown=0, NotChecked=0, Total=2550 [2018-09-28 10:00:37,296 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-09-28 10:00:37,541 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2018-09-28 10:00:37,662 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-28 10:00:42,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:42,859 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-09-28 10:00:42,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-28 10:00:42,860 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-09-28 10:00:42,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:42,860 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:00:42,860 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:00:42,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-09-28 10:00:42,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:00:42,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-28 10:00:42,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-28 10:00:42,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-28 10:00:42,867 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-28 10:00:42,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:42,867 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-28 10:00:42,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-28 10:00:42,868 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-28 10:00:42,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-28 10:00:42,868 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:42,868 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-28 10:00:42,868 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:42,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:42,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1065973288, now seen corresponding path program 25 times [2018-09-28 10:00:42,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:42,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:42,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:42,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:42,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:44,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:44,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:44,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:44,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:45,116 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:45,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2018-09-28 10:00:45,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-28 10:00:45,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-28 10:00:45,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2652, Unknown=0, NotChecked=0, Total=2756 [2018-09-28 10:00:45,117 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-09-28 10:00:45,247 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 8 [2018-09-28 10:00:45,373 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2018-09-28 10:00:45,499 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-28 10:00:45,628 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-28 10:00:45,761 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-28 10:00:45,893 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-28 10:00:51,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:51,081 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-28 10:00:51,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-28 10:00:51,082 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-09-28 10:00:51,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:51,083 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:00:51,083 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:00:51,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-09-28 10:00:51,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:00:51,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-28 10:00:51,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-28 10:00:51,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-28 10:00:51,090 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-28 10:00:51,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:51,091 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-28 10:00:51,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-28 10:00:51,091 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-28 10:00:51,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-28 10:00:51,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:51,092 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-28 10:00:51,092 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:51,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:51,092 INFO L82 PathProgramCache]: Analyzing trace with hash -2096917176, now seen corresponding path program 26 times [2018-09-28 10:00:51,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:51,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:51,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:51,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:51,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:51,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:52,867 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:52,867 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 [2018-09-28 10:00:52,875 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:00:53,080 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:00:53,080 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:53,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:53,340 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:53,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2018-09-28 10:00:53,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-28 10:00:53,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-28 10:00:53,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2018-09-28 10:00:53,342 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-09-28 10:00:53,475 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 8 [2018-09-28 10:00:53,596 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2018-09-28 10:00:53,726 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-28 10:00:53,863 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-28 10:00:54,007 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-28 10:00:54,149 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-28 10:00:55,157 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 11 [2018-09-28 10:00:59,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:59,858 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-09-28 10:00:59,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-28 10:00:59,858 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-09-28 10:00:59,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:59,859 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:00:59,859 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:00:59,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=2861, Invalid=8269, Unknown=0, NotChecked=0, Total=11130 [2018-09-28 10:00:59,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:00:59,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-28 10:00:59,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-28 10:00:59,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-28 10:00:59,867 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-28 10:00:59,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:59,867 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-28 10:00:59,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-28 10:00:59,867 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-28 10:00:59,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-28 10:00:59,867 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:59,867 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-28 10:00:59,868 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:59,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:59,868 INFO L82 PathProgramCache]: Analyzing trace with hash -797807512, now seen corresponding path program 27 times [2018-09-28 10:00:59,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:59,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:59,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:59,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:59,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:01,480 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:01,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:01,488 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:01:01,523 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-28 10:01:01,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:01,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:01,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:01,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2018-09-28 10:01:01,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-28 10:01:01,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-28 10:01:01,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=3080, Unknown=0, NotChecked=0, Total=3192 [2018-09-28 10:01:01,635 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-09-28 10:01:01,772 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 8 [2018-09-28 10:01:01,907 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2018-09-28 10:01:02,047 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-28 10:01:02,186 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-28 10:01:02,328 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-28 10:01:02,539 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-28 10:01:02,693 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-28 10:01:02,856 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-28 10:01:03,011 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-28 10:01:08,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:08,858 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-28 10:01:08,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-28 10:01:08,859 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-09-28 10:01:08,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:08,860 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:01:08,860 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:01:08,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=3079, Invalid=8911, Unknown=0, NotChecked=0, Total=11990 [2018-09-28 10:01:08,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:01:08,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-28 10:01:08,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-28 10:01:08,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-28 10:01:08,867 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-28 10:01:08,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:08,867 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-28 10:01:08,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-28 10:01:08,867 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-28 10:01:08,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-28 10:01:08,868 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:08,868 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-28 10:01:08,868 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:08,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:08,868 INFO L82 PathProgramCache]: Analyzing trace with hash 2106063752, now seen corresponding path program 28 times [2018-09-28 10:01:08,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:08,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:08,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:08,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:08,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:09,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:10,685 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:10,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:10,693 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:01:10,944 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:01:10,945 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:11,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:11,204 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:11,204 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2018-09-28 10:01:11,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-28 10:01:11,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-28 10:01:11,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=3306, Unknown=0, NotChecked=0, Total=3422 [2018-09-28 10:01:11,205 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-09-28 10:01:11,352 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 8 [2018-09-28 10:01:11,489 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 9 [2018-09-28 10:01:11,655 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-28 10:01:11,805 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-28 10:01:11,955 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-28 10:01:12,101 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-28 10:01:12,248 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-28 10:01:12,396 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-28 10:01:12,555 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-28 10:01:12,718 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-28 10:01:12,904 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-28 10:01:13,085 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-28 10:01:19,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:19,189 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-09-28 10:01:19,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-28 10:01:19,189 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-09-28 10:01:19,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:19,190 INFO L225 Difference]: With dead ends: 63 [2018-09-28 10:01:19,190 INFO L226 Difference]: Without dead ends: 61 [2018-09-28 10:01:19,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=3305, Invalid=9577, Unknown=0, NotChecked=0, Total=12882 [2018-09-28 10:01:19,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-28 10:01:19,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-28 10:01:19,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-28 10:01:19,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-28 10:01:19,197 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-28 10:01:19,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:19,197 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-28 10:01:19,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-28 10:01:19,197 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-28 10:01:19,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-28 10:01:19,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:19,198 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-28 10:01:19,198 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:19,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:19,199 INFO L82 PathProgramCache]: Analyzing trace with hash 997606056, now seen corresponding path program 29 times [2018-09-28 10:01:19,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:19,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:19,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:19,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:19,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:21,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:21,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:21,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:21,071 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:01:21,304 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-28 10:01:21,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:21,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:21,492 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:21,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2018-09-28 10:01:21,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-28 10:01:21,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-28 10:01:21,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=3540, Unknown=0, NotChecked=0, Total=3660 [2018-09-28 10:01:21,493 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-09-28 10:01:21,687 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 8 [2018-09-28 10:01:21,835 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2018-09-28 10:01:21,991 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-28 10:01:22,145 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-28 10:01:22,303 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-28 10:01:22,459 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-28 10:01:22,616 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-28 10:01:22,772 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-28 10:01:22,944 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-28 10:01:23,131 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-28 10:01:23,319 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-28 10:01:23,492 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-28 10:01:30,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:30,386 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-28 10:01:30,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-28 10:01:30,387 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-09-28 10:01:30,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:30,387 INFO L225 Difference]: With dead ends: 65 [2018-09-28 10:01:30,388 INFO L226 Difference]: Without dead ends: 63 [2018-09-28 10:01:30,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=3539, Invalid=10267, Unknown=0, NotChecked=0, Total=13806 [2018-09-28 10:01:30,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-28 10:01:30,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-28 10:01:30,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-28 10:01:30,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-28 10:01:30,395 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-28 10:01:30,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:30,395 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-28 10:01:30,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-28 10:01:30,395 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-28 10:01:30,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-28 10:01:30,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:30,396 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-28 10:01:30,396 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:30,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:30,396 INFO L82 PathProgramCache]: Analyzing trace with hash 921649608, now seen corresponding path program 30 times [2018-09-28 10:01:30,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:30,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:30,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:30,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:30,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:32,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:32,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:32,322 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:01:32,365 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-28 10:01:32,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:32,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:32,482 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:32,482 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2018-09-28 10:01:32,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-28 10:01:32,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-28 10:01:32,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3782, Unknown=0, NotChecked=0, Total=3906 [2018-09-28 10:01:32,483 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-09-28 10:01:32,648 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 8 [2018-09-28 10:01:32,802 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2018-09-28 10:01:32,967 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-28 10:01:33,133 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-28 10:01:33,311 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-28 10:01:33,491 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-28 10:01:33,682 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-28 10:01:33,850 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-28 10:01:34,019 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-28 10:01:34,194 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-28 10:01:34,373 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-28 10:01:34,547 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-28 10:01:34,723 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-28 10:01:34,897 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-28 10:01:41,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:41,761 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-09-28 10:01:41,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-28 10:01:41,762 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-09-28 10:01:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:41,763 INFO L225 Difference]: With dead ends: 67 [2018-09-28 10:01:41,763 INFO L226 Difference]: Without dead ends: 65 [2018-09-28 10:01:41,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=3781, Invalid=10981, Unknown=0, NotChecked=0, Total=14762 [2018-09-28 10:01:41,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-28 10:01:41,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-28 10:01:41,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-28 10:01:41,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-28 10:01:41,769 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-09-28 10:01:41,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:41,769 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-28 10:01:41,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-28 10:01:41,769 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-28 10:01:41,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-28 10:01:41,770 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:41,770 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-28 10:01:41,770 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:41,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:41,770 INFO L82 PathProgramCache]: Analyzing trace with hash 941947112, now seen corresponding path program 31 times [2018-09-28 10:01:41,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:41,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:41,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:41,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:41,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:44,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:44,123 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:44,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:44,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:44,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:44,789 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:44,789 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2018-09-28 10:01:44,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-28 10:01:44,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-28 10:01:44,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=4032, Unknown=0, NotChecked=0, Total=4160 [2018-09-28 10:01:44,790 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-09-28 10:01:44,967 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 8 [2018-09-28 10:01:45,134 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 9 [2018-09-28 10:01:45,307 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-28 10:01:45,481 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-28 10:01:45,658 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-28 10:01:45,832 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-28 10:01:46,009 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-28 10:01:46,187 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-28 10:01:46,365 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-28 10:01:46,559 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-28 10:01:46,736 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-28 10:01:46,912 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-28 10:01:47,090 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-28 10:01:47,266 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-28 10:01:47,458 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-28 10:01:47,642 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-28 10:01:48,220 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-09-28 10:01:48,616 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-09-28 10:01:54,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:54,887 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-28 10:01:54,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-28 10:01:54,888 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-09-28 10:01:54,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:54,888 INFO L225 Difference]: With dead ends: 69 [2018-09-28 10:01:54,889 INFO L226 Difference]: Without dead ends: 67 [2018-09-28 10:01:54,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=4031, Invalid=11719, Unknown=0, NotChecked=0, Total=15750 [2018-09-28 10:01:54,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-28 10:01:54,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-28 10:01:54,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-28 10:01:54,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-28 10:01:54,895 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-09-28 10:01:54,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:54,895 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-28 10:01:54,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-28 10:01:54,895 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-28 10:01:54,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-28 10:01:54,896 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:54,896 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-28 10:01:54,896 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:54,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:54,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1026988024, now seen corresponding path program 32 times [2018-09-28 10:01:54,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:54,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:54,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:54,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:54,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:57,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:57,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:57,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:57,106 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:01:57,460 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:01:57,461 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:57,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:57,865 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:57,866 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2018-09-28 10:01:57,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-28 10:01:57,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-28 10:01:57,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=4290, Unknown=0, NotChecked=0, Total=4422 [2018-09-28 10:01:57,867 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-09-28 10:01:58,041 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 8 [2018-09-28 10:01:58,201 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 9 [2018-09-28 10:01:58,377 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-28 10:01:58,548 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-28 10:01:58,732 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-28 10:01:58,934 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-28 10:01:59,123 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-28 10:01:59,304 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-28 10:01:59,487 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-28 10:01:59,669 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-28 10:01:59,852 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-28 10:02:00,037 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-28 10:02:00,220 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-28 10:02:00,402 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-28 10:02:00,605 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-28 10:02:01,392 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-28 10:02:01,596 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-28 10:02:02,813 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 11 [2018-09-28 10:02:08,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:08,485 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2018-09-28 10:02:08,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-28 10:02:08,485 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-09-28 10:02:08,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:08,486 INFO L225 Difference]: With dead ends: 71 [2018-09-28 10:02:08,486 INFO L226 Difference]: Without dead ends: 69 [2018-09-28 10:02:08,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=4289, Invalid=12481, Unknown=0, NotChecked=0, Total=16770 [2018-09-28 10:02:08,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-28 10:02:08,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-28 10:02:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-28 10:02:08,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-28 10:02:08,493 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-09-28 10:02:08,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:08,493 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-28 10:02:08,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-28 10:02:08,493 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-28 10:02:08,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-28 10:02:08,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:08,494 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-28 10:02:08,494 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:08,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:08,494 INFO L82 PathProgramCache]: Analyzing trace with hash 906923816, now seen corresponding path program 33 times [2018-09-28 10:02:08,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:08,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:08,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:08,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:08,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:11,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:11,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:02:11,028 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:02:11,075 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-28 10:02:11,075 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:11,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:11,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:11,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2018-09-28 10:02:11,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-28 10:02:11,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-28 10:02:11,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=4556, Unknown=0, NotChecked=0, Total=4692 [2018-09-28 10:02:11,225 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-09-28 10:02:11,405 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 8 [2018-09-28 10:02:11,576 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2018-09-28 10:02:11,767 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-28 10:02:11,954 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-28 10:02:12,160 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-28 10:02:12,352 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-28 10:02:12,541 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-28 10:02:12,736 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-28 10:02:12,941 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-28 10:02:13,146 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-28 10:02:13,359 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-28 10:02:13,580 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-28 10:02:13,772 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-28 10:02:13,966 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-28 10:02:14,201 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-28 10:02:14,446 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-28 10:02:14,681 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-28 10:02:14,908 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-28 10:02:15,138 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-28 10:02:15,341 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-28 10:02:15,554 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-28 10:02:15,762 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-28 10:02:22,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:22,999 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-28 10:02:23,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-28 10:02:23,000 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-09-28 10:02:23,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:23,001 INFO L225 Difference]: With dead ends: 73 [2018-09-28 10:02:23,001 INFO L226 Difference]: Without dead ends: 71 [2018-09-28 10:02:23,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=4555, Invalid=13267, Unknown=0, NotChecked=0, Total=17822 [2018-09-28 10:02:23,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-28 10:02:23,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-28 10:02:23,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-28 10:02:23,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-28 10:02:23,008 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-09-28 10:02:23,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:23,008 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-28 10:02:23,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-28 10:02:23,008 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-28 10:02:23,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-28 10:02:23,009 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:23,009 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-28 10:02:23,009 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:23,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:23,009 INFO L82 PathProgramCache]: Analyzing trace with hash -324637112, now seen corresponding path program 34 times [2018-09-28 10:02:23,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:23,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:23,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:23,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:23,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:23,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:25,765 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:25,765 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:02:25,774 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:02:26,201 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:02:26,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:26,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:26,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:26,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2018-09-28 10:02:26,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-28 10:02:26,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-28 10:02:26,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=4830, Unknown=0, NotChecked=0, Total=4970 [2018-09-28 10:02:26,598 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-09-28 10:02:26,794 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 8 [2018-09-28 10:02:26,984 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 9 [2018-09-28 10:02:27,178 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-28 10:02:27,385 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-28 10:02:27,586 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-28 10:02:27,789 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-28 10:02:27,992 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-28 10:02:28,194 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-28 10:02:28,400 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-28 10:02:28,606 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-28 10:02:28,807 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-28 10:02:29,015 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-28 10:02:29,226 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-28 10:02:29,432 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-28 10:02:29,680 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-28 10:02:29,921 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-28 10:02:30,147 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-28 10:02:30,376 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-28 10:02:30,618 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-28 10:02:30,846 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-28 10:02:31,079 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-28 10:02:31,301 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-28 10:02:31,525 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-28 10:02:39,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:39,251 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-09-28 10:02:39,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-28 10:02:39,252 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-09-28 10:02:39,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:39,253 INFO L225 Difference]: With dead ends: 75 [2018-09-28 10:02:39,253 INFO L226 Difference]: Without dead ends: 73 [2018-09-28 10:02:39,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=4829, Invalid=14077, Unknown=0, NotChecked=0, Total=18906 [2018-09-28 10:02:39,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-28 10:02:39,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-28 10:02:39,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-28 10:02:39,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-28 10:02:39,260 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-09-28 10:02:39,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:39,260 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-28 10:02:39,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-28 10:02:39,260 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-28 10:02:39,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-28 10:02:39,261 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:39,261 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-28 10:02:39,261 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:39,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:39,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1556284776, now seen corresponding path program 35 times [2018-09-28 10:02:39,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:39,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:39,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:39,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:39,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:42,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:42,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:02:42,099 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:02:42,493 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-28 10:02:42,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:42,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:42,815 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:42,815 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2018-09-28 10:02:42,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-28 10:02:42,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-28 10:02:42,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=5112, Unknown=0, NotChecked=0, Total=5256 [2018-09-28 10:02:42,816 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-09-28 10:02:43,024 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 8 [2018-09-28 10:02:43,226 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 9 [2018-09-28 10:02:43,442 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-28 10:02:43,663 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-28 10:02:43,870 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-28 10:02:44,078 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-28 10:02:44,296 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-28 10:02:44,509 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-28 10:02:44,730 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-28 10:02:44,962 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-28 10:02:45,208 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-28 10:02:45,432 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-28 10:02:45,643 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-28 10:02:45,858 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-28 10:02:46,093 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-28 10:02:46,333 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-28 10:02:46,561 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-28 10:02:46,790 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-28 10:02:47,020 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-28 10:02:47,257 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-28 10:02:47,492 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-28 10:02:47,719 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-28 10:02:48,182 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-28 10:02:48,406 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-28 10:02:56,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:56,548 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-28 10:02:56,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-28 10:02:56,548 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-09-28 10:02:56,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:56,549 INFO L225 Difference]: With dead ends: 77 [2018-09-28 10:02:56,549 INFO L226 Difference]: Without dead ends: 75 [2018-09-28 10:02:56,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=5111, Invalid=14911, Unknown=0, NotChecked=0, Total=20022 [2018-09-28 10:02:56,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-28 10:02:56,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-28 10:02:56,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-28 10:02:56,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-28 10:02:56,558 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-09-28 10:02:56,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:56,558 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-28 10:02:56,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-28 10:02:56,558 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-28 10:02:56,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-28 10:02:56,559 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:56,559 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-28 10:02:56,559 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:56,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:56,559 INFO L82 PathProgramCache]: Analyzing trace with hash 940987528, now seen corresponding path program 36 times [2018-09-28 10:02:56,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:56,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:56,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:56,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:56,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:59,319 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:59,319 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:02:59,328 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:02:59,378 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-28 10:02:59,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:59,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:59,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:59,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2018-09-28 10:02:59,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-28 10:02:59,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-28 10:02:59,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=5402, Unknown=0, NotChecked=0, Total=5550 [2018-09-28 10:02:59,556 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-09-28 10:02:59,806 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 8 [2018-09-28 10:03:00,014 WARN L178 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 9 [2018-09-28 10:03:00,236 WARN L178 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-28 10:03:00,474 WARN L178 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-28 10:03:00,698 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-28 10:03:00,915 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-28 10:03:01,134 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-28 10:03:01,351 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-28 10:03:01,588 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-28 10:03:01,814 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-28 10:03:02,044 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-28 10:03:02,273 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-28 10:03:02,495 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-28 10:03:02,713 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-28 10:03:02,958 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-28 10:03:03,214 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-28 10:03:03,448 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-28 10:03:03,688 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-28 10:03:03,941 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-28 10:03:04,195 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-28 10:03:04,442 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-28 10:03:04,691 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-28 10:03:04,945 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-28 10:03:05,193 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-28 10:03:05,460 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-28 10:03:05,707 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-28 10:03:05,940 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-28 10:03:14,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:14,380 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-09-28 10:03:14,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-28 10:03:14,380 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-09-28 10:03:14,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:14,381 INFO L225 Difference]: With dead ends: 79 [2018-09-28 10:03:14,381 INFO L226 Difference]: Without dead ends: 77 [2018-09-28 10:03:14,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=5401, Invalid=15769, Unknown=0, NotChecked=0, Total=21170 [2018-09-28 10:03:14,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-28 10:03:14,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-28 10:03:14,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-28 10:03:14,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-28 10:03:14,388 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-09-28 10:03:14,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:14,389 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-28 10:03:14,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-28 10:03:14,389 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-28 10:03:14,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-28 10:03:14,389 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:14,391 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-28 10:03:14,391 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:14,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:14,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1949148248, now seen corresponding path program 37 times [2018-09-28 10:03:14,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:14,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:14,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:14,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:14,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:17,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:17,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:03:17,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:03:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:18,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:18,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:18,533 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2018-09-28 10:03:18,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-28 10:03:18,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-28 10:03:18,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=5700, Unknown=0, NotChecked=0, Total=5852 [2018-09-28 10:03:18,534 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-09-28 10:03:18,756 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 8 [2018-09-28 10:03:18,980 WARN L178 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 9 [2018-09-28 10:03:19,206 WARN L178 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-28 10:03:19,430 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-28 10:03:19,672 WARN L178 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-28 10:03:19,897 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-28 10:03:20,128 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-28 10:03:20,365 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-28 10:03:20,606 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-28 10:03:20,875 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-28 10:03:21,144 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-28 10:03:21,380 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-28 10:03:21,624 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-28 10:03:21,857 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-28 10:03:22,111 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-28 10:03:22,368 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-28 10:03:22,606 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-28 10:03:22,865 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-28 10:03:23,116 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-28 10:03:23,389 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-28 10:03:23,648 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-28 10:03:23,903 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-28 10:03:24,167 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-28 10:03:24,426 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-28 10:03:24,688 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-28 10:03:24,947 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-28 10:03:25,214 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-28 10:03:25,469 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-28 10:03:25,717 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-28 10:03:25,993 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-28 10:03:26,278 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-09-28 10:03:34,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:34,293 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-28 10:03:34,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-28 10:03:34,294 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-09-28 10:03:34,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:34,294 INFO L225 Difference]: With dead ends: 81 [2018-09-28 10:03:34,295 INFO L226 Difference]: Without dead ends: 79 [2018-09-28 10:03:34,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=5699, Invalid=16651, Unknown=0, NotChecked=0, Total=22350 [2018-09-28 10:03:34,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-28 10:03:34,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-28 10:03:34,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-28 10:03:34,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-28 10:03:34,302 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-09-28 10:03:34,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:34,302 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-28 10:03:34,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-28 10:03:34,303 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-28 10:03:34,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-28 10:03:34,303 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:34,303 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-28 10:03:34,303 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:34,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:34,304 INFO L82 PathProgramCache]: Analyzing trace with hash -525788472, now seen corresponding path program 38 times [2018-09-28 10:03:34,304 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:34,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:34,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:34,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:03:34,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:38,328 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:38,328 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:03:38,337 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:03:38,921 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:03:38,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:39,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:39,432 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:39,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2018-09-28 10:03:39,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-28 10:03:39,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-28 10:03:39,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=6006, Unknown=0, NotChecked=0, Total=6162 [2018-09-28 10:03:39,434 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-09-28 10:03:39,701 WARN L178 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 8 [2018-09-28 10:03:39,938 WARN L178 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 9 [2018-09-28 10:03:40,171 WARN L178 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-28 10:03:40,405 WARN L178 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-28 10:03:40,646 WARN L178 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-28 10:03:40,878 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-28 10:03:41,114 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-28 10:03:41,373 WARN L178 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-28 10:03:41,654 WARN L178 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-28 10:03:41,908 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-28 10:03:42,158 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-28 10:03:42,420 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-28 10:03:42,667 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-28 10:03:42,903 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-28 10:03:43,162 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-28 10:03:43,428 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-28 10:03:43,683 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-28 10:03:43,945 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 Received shutdown request... [2018-09-28 10:03:44,205 WARN L186 SmtUtils]: Removed 4 from assertion stack [2018-09-28 10:03:44,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 10:03:44,206 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-28 10:03:44,210 WARN L206 ceAbstractionStarter]: Timeout [2018-09-28 10:03:44,210 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.09 10:03:44 BoogieIcfgContainer [2018-09-28 10:03:44,210 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-28 10:03:44,211 INFO L168 Benchmark]: Toolchain (without parser) took 253344.09 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -177.2 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 344.0 MB). Peak memory consumption was 166.7 MB. Max. memory is 7.1 GB. [2018-09-28 10:03:44,215 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:03:44,215 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:03:44,215 INFO L168 Benchmark]: Boogie Preprocessor took 21.79 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:03:44,216 INFO L168 Benchmark]: RCFGBuilder took 254.15 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. [2018-09-28 10:03:44,216 INFO L168 Benchmark]: TraceAbstraction took 253020.80 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -177.2 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 322.8 MB). Peak memory consumption was 145.6 MB. Max. memory is 7.1 GB. [2018-09-28 10:03:44,218 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 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.22 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 21.79 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 254.15 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 253020.80 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -177.2 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 322.8 MB). Peak memory consumption was 145.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 39]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 39). Cancelled while BasicCegarLoop was constructing difference of abstraction (79states) and FLOYD_HOARE automaton (currently 20 states, 79 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 182. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 252.9s OverallTime, 39 OverallIterations, 75 TraceHistogramMax, 188.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 115 SDtfs, 0 SDslu, 1427 SDs, 0 SdLazy, 3063 SolverSat, 1443 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4429 GetRequests, 1521 SyntacticMatches, 0 SemanticMatches, 2907 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33286 ImplicationChecksByTransitivity, 231.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=38, 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: 0.2s AutomataMinimizationTime, 38 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 8.6s SatisfiabilityAnalysisTime, 53.8s InterpolantComputationTime, 3119 NumberOfCodeBlocks, 3119 NumberOfCodeBlocksAsserted, 444 NumberOfCheckSat, 3042 ConstructedInterpolants, 0 QuantifiedInterpolants, 781682 SizeOfPredicates, 76 NumberOfNonLiveVariables, 4978 ConjunctsInSsa, 1584 ConjunctsInUnsatCore, 77 InterpolantComputations, 1 PerfectInterpolantSequences, 0/74594 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_k.i_3.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-28_10-03-44-228.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-28_10-03-44-228.csv Completed graceful shutdown