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 0.1.23-1cc990c [2018-09-30 20:10:04,820 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:10:04,822 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:10:04,834 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:10:04,834 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:10:04,835 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:10:04,836 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:10:04,838 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:10:04,840 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:10:04,841 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:10:04,842 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 20:10:04,877 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 20:10:04,907 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:10:04,907 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:10:04,908 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:10:04,908 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:10:04,909 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:10:04,909 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:10:04,909 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:10:04,910 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:10:04,911 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:10:04,911 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:10:04,911 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:10:04,911 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:10:04,911 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:10:04,912 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:10:04,912 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:10:04,912 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:10:04,912 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:10:04,912 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:10:04,914 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:10:04,914 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:10:04,914 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:10:04,914 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:10:04,914 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:10:04,915 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:10:04,915 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:10:04,915 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:10:04,915 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:10:04,915 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:10:04,916 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:10:04,916 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:10:04,979 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:10:04,992 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:10:04,998 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:10:05,000 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:10:05,000 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:10:05,001 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-09-30 20:10:05,002 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl' [2018-09-30 20:10:05,049 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:10:05,052 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:10:05,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:10:05,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:10:05,054 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:10:05,076 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 30.09 08:10:05" (1/1) ... [2018-09-30 20:10:05,089 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 30.09 08:10:05" (1/1) ... [2018-09-30 20:10:05,096 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:10:05,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:10:05,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:10:05,097 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:10:05,108 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 30.09 08:10:05" (1/1) ... [2018-09-30 20:10:05,108 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 30.09 08:10:05" (1/1) ... [2018-09-30 20:10:05,109 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 30.09 08:10:05" (1/1) ... [2018-09-30 20:10:05,109 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 30.09 08:10:05" (1/1) ... [2018-09-30 20:10:05,111 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 30.09 08:10:05" (1/1) ... [2018-09-30 20:10:05,115 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 30.09 08:10:05" (1/1) ... [2018-09-30 20:10:05,115 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 30.09 08:10:05" (1/1) ... [2018-09-30 20:10:05,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:10:05,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:10:05,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:10:05,118 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:10:05,119 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 30.09 08:10:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:10:05,187 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-30 20:10:05,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 20:10:05,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 20:10:05,405 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 20:10:05,406 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:10:05 BoogieIcfgContainer [2018-09-30 20:10:05,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:10:05,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:10:05,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:10:05,409 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:10:05,409 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 30.09 08:10:05" (1/2) ... [2018-09-30 20:10:05,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c5bf7e and model type count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:10:05, skipping insertion in model container [2018-09-30 20:10:05,411 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 30.09 08:10:05" (2/2) ... [2018-09-30 20:10:05,412 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-09-30 20:10:05,422 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:10:05,432 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:10:05,475 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:10:05,476 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:10:05,476 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:10:05,476 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:10:05,476 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:10:05,476 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:10:05,477 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:10:05,477 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:10:05,477 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:10:05,490 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 20:10:05,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 20:10:05,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:05,499 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 20:10:05,500 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:05,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:05,506 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-09-30 20:10:05,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:05,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:05,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:05,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:05,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:05,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:05,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:05,695 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:10:05,696 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 20:10:05,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:10:05,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:10:05,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:10:05,714 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 20:10:05,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:05,751 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-30 20:10:05,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:10:05,753 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 20:10:05,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:05,771 INFO L225 Difference]: With dead ends: 9 [2018-09-30 20:10:05,771 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 20:10:05,782 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:10:05,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 20:10:05,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 20:10:05,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 20:10:05,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 20:10:05,857 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 20:10:05,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:05,858 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 20:10:05,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:10:05,858 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 20:10:05,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 20:10:05,862 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:05,862 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 20:10:05,863 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:05,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:05,863 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-09-30 20:10:05,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:05,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:05,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:05,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:05,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:05,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:05,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:05,989 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 [2018-09-30 20:10:05,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:06,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:06,257 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:06,257 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2018-09-30 20:10:06,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:10:06,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:10:06,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:10:06,259 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-09-30 20:10:06,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:06,353 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-30 20:10:06,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:10:06,355 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-30 20:10:06,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:06,356 INFO L225 Difference]: With dead ends: 9 [2018-09-30 20:10:06,357 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 20:10:06,359 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 [2018-09-30 20:10:06,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 20:10:06,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 20:10:06,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 20:10:06,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 20:10:06,363 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-30 20:10:06,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:06,363 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 20:10:06,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:10:06,364 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 20:10:06,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 20:10:06,365 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:06,365 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-30 20:10:06,365 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:06,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:06,366 INFO L82 PathProgramCache]: Analyzing trace with hash 892275272, now seen corresponding path program 2 times [2018-09-30 20:10:06,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:06,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:06,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:06,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:06,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:06,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:06,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:06,561 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:10:06,572 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:10:06,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:06,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:06,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:06,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-09-30 20:10:06,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:10:06,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:10:06,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:10:06,662 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-09-30 20:10:06,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:06,912 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 20:10:06,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:10:06,913 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-09-30 20:10:06,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:06,914 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:10:06,914 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 20:10:06,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:10:06,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 20:10:06,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 20:10:06,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 20:10:06,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 20:10:06,919 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-30 20:10:06,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:06,920 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 20:10:06,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:10:06,920 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 20:10:06,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:10:06,920 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:06,921 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-30 20:10:06,923 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:06,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:06,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1516986008, now seen corresponding path program 3 times [2018-09-30 20:10:06,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:06,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:06,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:06,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:06,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:07,332 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:07,332 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:07,345 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:10:07,358 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 20:10:07,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:07,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:07,523 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:07,524 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-09-30 20:10:07,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:10:07,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:10:07,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:10:07,525 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-09-30 20:10:07,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:07,825 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-30 20:10:07,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:10:07,826 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-09-30 20:10:07,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:07,826 INFO L225 Difference]: With dead ends: 13 [2018-09-30 20:10:07,827 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:10:07,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:10:07,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:10:07,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 20:10:07,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:10:07,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 20:10:07,832 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-30 20:10:07,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:07,832 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 20:10:07,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:10:07,832 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 20:10:07,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:10:07,833 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:07,833 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-30 20:10:07,833 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:07,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:07,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1829703544, now seen corresponding path program 4 times [2018-09-30 20:10:07,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:07,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:07,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:07,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:07,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:08,277 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:08,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:08,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:08,285 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:10:08,300 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:10:08,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:08,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:08,400 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:08,420 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:08,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-09-30 20:10:08,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:10:08,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:10:08,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:10:08,422 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-09-30 20:10:08,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:08,669 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-09-30 20:10:08,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:10:08,670 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-09-30 20:10:08,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:08,671 INFO L225 Difference]: With dead ends: 15 [2018-09-30 20:10:08,671 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 20:10:08,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:10:08,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 20:10:08,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 20:10:08,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 20:10:08,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 20:10:08,676 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-30 20:10:08,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:08,676 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 20:10:08,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:10:08,676 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 20:10:08,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 20:10:08,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:08,677 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-30 20:10:08,678 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:08,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:08,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1703544920, now seen corresponding path program 5 times [2018-09-30 20:10:08,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:08,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:08,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:08,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:08,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:09,484 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:09,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:09,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:09,504 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:10:09,522 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 20:10:09,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:09,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:09,605 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:09,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-09-30 20:10:09,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:10:09,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:10:09,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:10:09,607 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-09-30 20:10:09,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:09,993 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-30 20:10:09,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:10:09,994 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-09-30 20:10:09,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:09,995 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:10:09,995 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 20:10:09,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:10:09,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 20:10:10,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 20:10:10,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 20:10:10,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 20:10:10,001 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-30 20:10:10,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:10,001 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 20:10:10,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:10:10,002 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 20:10:10,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:10:10,002 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:10,003 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-30 20:10:10,003 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:10,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:10,003 INFO L82 PathProgramCache]: Analyzing trace with hash -724191544, now seen corresponding path program 6 times [2018-09-30 20:10:10,004 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:10,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:10,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:10,005 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:10,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:10,299 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:10,299 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:10,310 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:10:10,336 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:10:10,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:10,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:10,409 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:10,410 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-09-30 20:10:10,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:10:10,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:10:10,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:10:10,411 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-09-30 20:10:11,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:11,037 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-09-30 20:10:11,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:10:11,040 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-30 20:10:11,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:11,041 INFO L225 Difference]: With dead ends: 19 [2018-09-30 20:10:11,041 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 20:10:11,042 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 [2018-09-30 20:10:11,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 20:10:11,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 20:10:11,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 20:10:11,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 20:10:11,046 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-30 20:10:11,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:11,046 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 20:10:11,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:10:11,047 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 20:10:11,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 20:10:11,047 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:11,047 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-30 20:10:11,048 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:11,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:11,048 INFO L82 PathProgramCache]: Analyzing trace with hash -163435032, now seen corresponding path program 7 times [2018-09-30 20:10:11,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:11,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:11,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:11,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:11,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:11,301 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:11,301 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:11,301 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:11,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:11,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:11,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:11,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:11,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-09-30 20:10:11,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:10:11,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:10:11,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:10:11,439 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-09-30 20:10:12,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:12,094 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-30 20:10:12,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:10:12,094 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-09-30 20:10:12,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:12,095 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:10:12,095 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:10:12,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:10:12,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:10:12,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 20:10:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 20:10:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 20:10:12,102 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-30 20:10:12,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:12,102 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 20:10:12,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:10:12,102 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 20:10:12,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:10:12,103 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:12,103 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-30 20:10:12,103 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:12,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:12,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1852661000, now seen corresponding path program 8 times [2018-09-30 20:10:12,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:12,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:12,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:12,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:12,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:12,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:12,397 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:12,412 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:10:12,428 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:10:12,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:12,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:12,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:12,521 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-09-30 20:10:12,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:10:12,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:10:12,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:10:12,522 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-09-30 20:10:13,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:13,371 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-09-30 20:10:13,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:10:13,371 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-09-30 20:10:13,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:13,372 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:10:13,372 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 20:10:13,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:10:13,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 20:10:13,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 20:10:13,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 20:10:13,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 20:10:13,378 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-30 20:10:13,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:13,379 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 20:10:13,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:10:13,379 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 20:10:13,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:10:13,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:13,380 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-30 20:10:13,380 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:13,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:13,381 INFO L82 PathProgramCache]: Analyzing trace with hash -2004270040, now seen corresponding path program 9 times [2018-09-30 20:10:13,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:13,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:13,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:13,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:13,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:13,719 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:13,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:13,733 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:10:13,749 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 20:10:13,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:13,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:13,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:13,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-09-30 20:10:13,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:10:13,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:10:13,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:10:13,897 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-09-30 20:10:14,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:14,922 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-30 20:10:14,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:10:14,923 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-09-30 20:10:14,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:14,924 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:10:14,924 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:10:14,925 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 [2018-09-30 20:10:14,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:10:14,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 20:10:14,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 20:10:14,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 20:10:14,935 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-30 20:10:14,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:14,935 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 20:10:14,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 20:10:14,935 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 20:10:14,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:10:14,937 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:14,937 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-30 20:10:14,938 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:14,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:14,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1958223032, now seen corresponding path program 10 times [2018-09-30 20:10:14,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:14,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:14,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:14,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:14,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:15,547 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:15,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:15,555 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:10:15,580 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:10:15,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:15,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:15,689 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:15,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-09-30 20:10:15,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 20:10:15,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 20:10:15,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:10:15,691 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-09-30 20:10:16,198 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 11 [2018-09-30 20:10:16,623 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 11 [2018-09-30 20:10:17,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:17,074 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-09-30 20:10:17,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:10:17,075 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-09-30 20:10:17,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:17,075 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:10:17,075 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 20:10:17,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 20:10:17,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 20:10:17,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 20:10:17,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 20:10:17,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 20:10:17,082 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-30 20:10:17,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:17,082 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 20:10:17,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 20:10:17,082 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 20:10:17,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 20:10:17,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:17,083 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-30 20:10:17,083 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:17,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:17,084 INFO L82 PathProgramCache]: Analyzing trace with hash -656721304, now seen corresponding path program 11 times [2018-09-30 20:10:17,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:17,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:17,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:17,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:17,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:17,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:17,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:17,491 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:10:17,524 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 20:10:17,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:17,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:17,710 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:17,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-09-30 20:10:17,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 20:10:17,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 20:10:17,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:10:17,712 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-09-30 20:10:18,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:18,775 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-30 20:10:18,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:10:18,776 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-09-30 20:10:18,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:18,778 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:10:18,778 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:10:18,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:10:18,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:10:18,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 20:10:18,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 20:10:18,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 20:10:18,784 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-30 20:10:18,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:18,785 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 20:10:18,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 20:10:18,785 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 20:10:18,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 20:10:18,785 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:18,786 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-30 20:10:18,786 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:18,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:18,786 INFO L82 PathProgramCache]: Analyzing trace with hash 250956168, now seen corresponding path program 12 times [2018-09-30 20:10:18,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:18,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:18,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:18,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:18,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:19,181 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:19,182 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:19,198 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:10:19,227 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 20:10:19,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:19,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:19,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:19,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-09-30 20:10:19,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 20:10:19,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 20:10:19,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:10:19,351 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-09-30 20:10:20,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:20,534 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-09-30 20:10:20,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:10:20,535 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-09-30 20:10:20,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:20,535 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:10:20,536 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:10:20,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:10:20,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:10:20,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 20:10:20,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 20:10:20,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 20:10:20,543 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-30 20:10:20,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:20,543 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 20:10:20,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 20:10:20,543 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 20:10:20,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 20:10:20,544 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:20,544 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-30 20:10:20,544 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:20,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:20,544 INFO L82 PathProgramCache]: Analyzing trace with hash 650645672, now seen corresponding path program 13 times [2018-09-30 20:10:20,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:20,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:20,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:20,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:20,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:21,050 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:21,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:21,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:21,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:21,468 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:21,468 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-09-30 20:10:21,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:10:21,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:10:21,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:10:21,470 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-09-30 20:10:21,782 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 11 [2018-09-30 20:10:23,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:23,206 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-30 20:10:23,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:10:23,206 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-09-30 20:10:23,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:23,206 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:10:23,207 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:10:23,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:10:23,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:10:23,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 20:10:23,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 20:10:23,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 20:10:23,213 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-30 20:10:23,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:23,213 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 20:10:23,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:10:23,214 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 20:10:23,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 20:10:23,214 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:23,214 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-30 20:10:23,215 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:23,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:23,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1794797624, now seen corresponding path program 14 times [2018-09-30 20:10:23,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:23,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:23,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:23,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:23,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:23,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:23,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:23,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:23,779 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:10:23,833 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:10:23,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:23,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:24,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:24,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-09-30 20:10:24,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 20:10:24,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 20:10:24,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:10:24,052 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-09-30 20:10:25,219 WARN L178 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 11 [2018-09-30 20:10:26,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:26,064 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-09-30 20:10:26,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:10:26,065 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-09-30 20:10:26,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:26,066 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:10:26,066 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:10:26,068 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 [2018-09-30 20:10:26,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:10:26,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 20:10:26,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 20:10:26,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 20:10:26,073 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-30 20:10:26,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:26,074 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 20:10:26,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 20:10:26,074 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 20:10:26,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 20:10:26,074 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:26,075 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-30 20:10:26,075 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:26,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:26,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1776273128, now seen corresponding path program 15 times [2018-09-30 20:10:26,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:26,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:26,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:26,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:26,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:26,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:27,017 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:27,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:27,025 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:10:27,050 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 20:10:27,050 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:27,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:27,121 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:27,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:27,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-09-30 20:10:27,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 20:10:27,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 20:10:27,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 20:10:27,143 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-09-30 20:10:29,462 WARN L178 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 11 [2018-09-30 20:10:29,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:29,946 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-30 20:10:29,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:10:29,947 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-09-30 20:10:29,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:29,948 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:10:29,948 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:10:29,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 20:10:29,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:10:29,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 20:10:29,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 20:10:29,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 20:10:29,955 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-30 20:10:29,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:29,956 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 20:10:29,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 20:10:29,956 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 20:10:29,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 20:10:29,957 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:29,957 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-30 20:10:29,957 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:29,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:29,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1896396296, now seen corresponding path program 16 times [2018-09-30 20:10:29,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:29,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:29,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:29,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:29,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:30,596 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:30,596 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:30,604 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:10:30,662 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:10:30,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:30,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:30,788 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:30,789 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-09-30 20:10:30,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 20:10:30,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 20:10:30,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 20:10:30,790 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-09-30 20:10:33,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:33,002 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-09-30 20:10:33,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:10:33,003 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-09-30 20:10:33,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:33,003 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:10:33,004 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:10:33,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 20:10:33,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:10:33,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 20:10:33,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 20:10:33,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 20:10:33,012 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-30 20:10:33,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:33,012 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 20:10:33,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 20:10:33,012 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 20:10:33,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 20:10:33,013 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:33,013 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-30 20:10:33,013 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:33,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:33,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1370643752, now seen corresponding path program 17 times [2018-09-30 20:10:33,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:33,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:33,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:33,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:33,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:33,926 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:33,926 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:33,934 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:10:33,997 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 20:10:33,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:34,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:34,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:34,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-09-30 20:10:34,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 20:10:34,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 20:10:34,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:10:34,116 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-09-30 20:10:36,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:36,633 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-30 20:10:36,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:10:36,633 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-09-30 20:10:36,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:36,634 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:10:36,634 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:10:36,637 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 [2018-09-30 20:10:36,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:10:36,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 20:10:36,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 20:10:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 20:10:36,643 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-30 20:10:36,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:36,643 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 20:10:36,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 20:10:36,644 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 20:10:36,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 20:10:36,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:36,644 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-30 20:10:36,645 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:36,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:36,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1366377400, now seen corresponding path program 18 times [2018-09-30 20:10:36,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:36,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:36,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:36,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:36,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:38,582 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:38,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:38,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:38,591 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:10:38,632 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 20:10:38,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:38,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:38,746 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:38,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:38,768 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-09-30 20:10:38,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 20:10:38,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 20:10:38,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 20:10:38,769 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-09-30 20:10:41,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:41,603 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-09-30 20:10:41,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:10:41,604 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-09-30 20:10:41,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:41,604 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:10:41,605 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:10:41,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 20:10:41,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:10:41,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 20:10:41,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 20:10:41,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 20:10:41,613 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-30 20:10:41,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:41,613 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 20:10:41,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 20:10:41,613 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 20:10:41,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 20:10:41,614 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:41,614 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-30 20:10:41,614 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:41,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:41,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1171247976, now seen corresponding path program 19 times [2018-09-30 20:10:41,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:41,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:41,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:41,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:41,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:42,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:42,435 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:42,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:42,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:42,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:42,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-09-30 20:10:42,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:10:42,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:10:42,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 20:10:42,681 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-09-30 20:10:45,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:45,833 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-30 20:10:45,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:10:45,833 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-09-30 20:10:45,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:45,834 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:10:45,834 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:10:45,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 20:10:45,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:10:45,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 20:10:45,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 20:10:45,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 20:10:45,843 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-30 20:10:45,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:45,843 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 20:10:45,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:10:45,843 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 20:10:45,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 20:10:45,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:45,844 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-30 20:10:45,844 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:45,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:45,845 INFO L82 PathProgramCache]: Analyzing trace with hash 287810184, now seen corresponding path program 20 times [2018-09-30 20:10:45,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:45,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:45,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:45,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:45,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:46,819 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:46,819 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:46,829 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:10:46,930 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:10:46,930 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:46,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:47,078 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:47,078 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-09-30 20:10:47,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 20:10:47,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 20:10:47,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 20:10:47,079 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-09-30 20:10:50,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:50,652 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-09-30 20:10:50,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:10:50,652 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-09-30 20:10:50,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:50,653 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:10:50,653 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:10:50,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 20:10:50,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:10:50,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 20:10:50,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 20:10:50,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 20:10:50,662 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-30 20:10:50,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:50,662 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 20:10:50,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 20:10:50,662 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 20:10:50,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 20:10:50,663 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:50,663 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-30 20:10:50,663 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:50,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:50,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1707616680, now seen corresponding path program 21 times [2018-09-30 20:10:50,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:50,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:50,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:50,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:50,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:51,723 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:51,724 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:51,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:51,734 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:10:51,764 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 20:10:51,764 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:51,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:51,852 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:51,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-09-30 20:10:51,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 20:10:51,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 20:10:51,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:10:51,853 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-09-30 20:10:55,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:55,892 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-30 20:10:55,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 20:10:55,895 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-09-30 20:10:55,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:55,896 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:10:55,896 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:10:55,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 20:10:55,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:10:55,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 20:10:55,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 20:10:55,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 20:10:55,902 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-30 20:10:55,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:55,903 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 20:10:55,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 20:10:55,903 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 20:10:55,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 20:10:55,904 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:55,904 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-30 20:10:55,904 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:55,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:55,904 INFO L82 PathProgramCache]: Analyzing trace with hash 342059208, now seen corresponding path program 22 times [2018-09-30 20:10:55,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:55,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:55,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:55,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:55,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:57,022 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:57,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:57,032 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:10:57,161 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:10:57,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:57,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:57,353 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:57,353 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-09-30 20:10:57,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:10:57,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:10:57,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 20:10:57,354 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-09-30 20:11:01,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:01,865 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-09-30 20:11:01,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:11:01,865 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-09-30 20:11:01,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:01,866 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:11:01,866 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:11:01,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 20:11:01,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:11:01,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 20:11:01,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 20:11:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 20:11:01,874 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-30 20:11:01,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:01,874 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 20:11:01,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:11:01,874 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 20:11:01,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 20:11:01,875 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:01,875 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-30 20:11:01,876 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:01,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:01,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1993646104, now seen corresponding path program 23 times [2018-09-30 20:11:01,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:01,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:01,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:01,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:01,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:03,281 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:03,281 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:03,290 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:11:03,416 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 20:11:03,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:03,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:03,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:03,541 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:03,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-09-30 20:11:03,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 20:11:03,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 20:11:03,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 20:11:03,542 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-09-30 20:11:03,822 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 9 [2018-09-30 20:11:03,965 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-09-30 20:11:04,104 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-09-30 20:11:08,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:08,512 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-30 20:11:08,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:11:08,513 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-09-30 20:11:08,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:08,514 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:11:08,514 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:11:08,516 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 [2018-09-30 20:11:08,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:11:08,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 20:11:08,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 20:11:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 20:11:08,521 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-30 20:11:08,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:08,522 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 20:11:08,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 20:11:08,522 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 20:11:08,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 20:11:08,524 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:08,524 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-30 20:11:08,524 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:08,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:08,525 INFO L82 PathProgramCache]: Analyzing trace with hash -338555128, now seen corresponding path program 24 times [2018-09-30 20:11:08,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:08,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:08,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:08,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:08,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:08,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:10,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:10,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:10,241 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:11:10,273 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 20:11:10,273 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:10,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:10,779 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:10,779 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-09-30 20:11:10,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 20:11:10,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 20:11:10,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2450, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 20:11:10,781 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-09-30 20:11:11,010 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2018-09-30 20:11:11,132 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 20:11:11,255 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 20:11:16,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:16,219 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-09-30 20:11:16,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:11:16,219 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-09-30 20:11:16,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:16,220 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:11:16,220 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:11:16,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 20:11:16,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:11:16,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 20:11:16,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 20:11:16,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 20:11:16,228 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-30 20:11:16,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:16,228 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 20:11:16,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 20:11:16,228 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 20:11:16,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 20:11:16,229 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:16,229 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-30 20:11:16,229 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:16,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:16,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1065973288, now seen corresponding path program 25 times [2018-09-30 20:11:16,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:16,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:16,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:16,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:16,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:17,869 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:17,869 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:17,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:18,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:18,279 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:18,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2018-09-30 20:11:18,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:11:18,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:11:18,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2652, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 20:11:18,281 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-09-30 20:11:18,414 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 8 [2018-09-30 20:11:18,537 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2018-09-30 20:11:18,663 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:11:18,789 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 20:11:18,918 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 20:11:19,048 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 20:11:19,322 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-09-30 20:11:19,471 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-09-30 20:11:24,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:24,198 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-30 20:11:24,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 20:11:24,198 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-09-30 20:11:24,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:24,199 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:11:24,199 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:11:24,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 20:11:24,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:11:24,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 20:11:24,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 20:11:24,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 20:11:24,207 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-30 20:11:24,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:24,208 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 20:11:24,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:11:24,208 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 20:11:24,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 20:11:24,208 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:24,209 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-30 20:11:24,209 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:24,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:24,209 INFO L82 PathProgramCache]: Analyzing trace with hash -2096917176, now seen corresponding path program 26 times [2018-09-30 20:11:24,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:24,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:24,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:24,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:24,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:24,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:25,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:25,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:25,892 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:11:26,094 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:11:26,094 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:26,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:26,340 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:26,340 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2018-09-30 20:11:26,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 20:11:26,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 20:11:26,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 20:11:26,341 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-09-30 20:11:26,474 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 8 [2018-09-30 20:11:26,603 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2018-09-30 20:11:26,731 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:11:26,861 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 20:11:27,000 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:11:27,140 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 20:11:27,554 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-09-30 20:11:27,724 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-09-30 20:11:32,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:32,953 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-09-30 20:11:32,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 20:11:32,953 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-09-30 20:11:32,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:32,954 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:11:32,954 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:11:32,956 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 [2018-09-30 20:11:32,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:11:32,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 20:11:32,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 20:11:32,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 20:11:32,961 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-30 20:11:32,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:32,961 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 20:11:32,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 20:11:32,962 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 20:11:32,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 20:11:32,962 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:32,962 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-30 20:11:32,963 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:32,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:32,963 INFO L82 PathProgramCache]: Analyzing trace with hash -797807512, now seen corresponding path program 27 times [2018-09-30 20:11:32,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:32,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:32,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:32,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:32,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:33,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:34,901 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:34,901 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:34,909 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:11:34,947 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 20:11:34,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:34,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:35,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:35,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2018-09-30 20:11:35,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 20:11:35,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 20:11:35,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=3080, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 20:11:35,064 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-09-30 20:11:35,205 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 8 [2018-09-30 20:11:35,338 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2018-09-30 20:11:35,478 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 20:11:35,613 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 20:11:35,753 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:11:35,908 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 20:11:36,042 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:11:36,467 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 20:11:42,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:42,089 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-30 20:11:42,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 20:11:42,090 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-09-30 20:11:42,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:42,091 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:11:42,091 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:11:42,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=3079, Invalid=8911, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 20:11:42,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:11:42,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 20:11:42,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 20:11:42,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 20:11:42,096 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-30 20:11:42,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:42,096 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 20:11:42,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 20:11:42,096 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 20:11:42,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 20:11:42,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:42,097 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-30 20:11:42,097 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:42,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:42,098 INFO L82 PathProgramCache]: Analyzing trace with hash 2106063752, now seen corresponding path program 28 times [2018-09-30 20:11:42,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:42,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:42,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:42,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:42,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:43,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:43,868 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:43,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:43,877 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:11:44,129 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:11:44,129 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:44,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:44,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:44,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2018-09-30 20:11:44,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 20:11:44,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 20:11:44,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=3306, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 20:11:44,435 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-09-30 20:11:44,577 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 8 [2018-09-30 20:11:44,714 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 9 [2018-09-30 20:11:44,893 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 20:11:45,063 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 20:11:45,235 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 20:11:45,378 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 20:11:45,527 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:11:45,671 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 20:11:45,822 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:11:45,975 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 20:11:52,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:52,272 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-09-30 20:11:52,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 20:11:52,272 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-09-30 20:11:52,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:52,273 INFO L225 Difference]: With dead ends: 63 [2018-09-30 20:11:52,273 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 20:11:52,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=3305, Invalid=9577, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 20:11:52,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 20:11:52,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 20:11:52,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 20:11:52,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 20:11:52,278 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-30 20:11:52,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:52,278 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 20:11:52,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 20:11:52,279 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 20:11:52,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 20:11:52,279 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:52,279 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-30 20:11:52,279 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:52,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:52,279 INFO L82 PathProgramCache]: Analyzing trace with hash 997606056, now seen corresponding path program 29 times [2018-09-30 20:11:52,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:52,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:52,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:52,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:52,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:54,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:54,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:54,028 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:11:54,258 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 20:11:54,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:54,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:54,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:54,432 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:54,432 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2018-09-30 20:11:54,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 20:11:54,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 20:11:54,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=3540, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 20:11:54,433 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-09-30 20:11:54,590 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 8 [2018-09-30 20:11:54,736 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2018-09-30 20:11:54,888 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 20:11:55,048 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 20:11:55,222 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 20:11:55,407 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 20:11:55,565 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 20:11:55,718 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 20:11:55,881 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:11:56,045 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 20:11:56,204 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:11:56,369 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 20:11:56,539 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 20:12:03,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:03,184 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-30 20:12:03,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 20:12:03,185 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-09-30 20:12:03,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:03,186 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:12:03,186 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 20:12:03,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=3539, Invalid=10267, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 20:12:03,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 20:12:03,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 20:12:03,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 20:12:03,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 20:12:03,192 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-30 20:12:03,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:03,192 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 20:12:03,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 20:12:03,192 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 20:12:03,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 20:12:03,193 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:03,193 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-30 20:12:03,193 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:03,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:03,194 INFO L82 PathProgramCache]: Analyzing trace with hash 921649608, now seen corresponding path program 30 times [2018-09-30 20:12:03,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:03,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:03,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:03,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:03,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:05,111 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:05,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:05,119 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:12:05,170 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 20:12:05,171 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:05,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:05,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:05,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2018-09-30 20:12:05,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 20:12:05,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 20:12:05,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3782, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 20:12:05,305 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-09-30 20:12:05,548 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 8 [2018-09-30 20:12:05,720 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2018-09-30 20:12:05,897 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 20:12:06,060 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 20:12:06,228 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 20:12:06,392 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 20:12:06,557 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 20:12:06,772 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 20:12:06,933 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 20:12:07,098 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 20:12:07,276 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:12:07,450 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 20:12:07,616 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:12:07,971 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 20:12:14,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:14,536 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-09-30 20:12:14,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 20:12:14,536 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-09-30 20:12:14,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:14,537 INFO L225 Difference]: With dead ends: 67 [2018-09-30 20:12:14,537 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 20:12:14,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=3781, Invalid=10981, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 20:12:14,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 20:12:14,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 20:12:14,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 20:12:14,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 20:12:14,543 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-09-30 20:12:14,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:14,544 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 20:12:14,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 20:12:14,544 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 20:12:14,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 20:12:14,544 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:14,544 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-30 20:12:14,544 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:14,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:14,545 INFO L82 PathProgramCache]: Analyzing trace with hash 941947112, now seen corresponding path program 31 times [2018-09-30 20:12:14,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:14,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:14,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:14,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:14,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:16,930 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:16,930 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:16,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:17,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:17,584 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:17,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2018-09-30 20:12:17,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 20:12:17,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 20:12:17,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=4032, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 20:12:17,585 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-09-30 20:12:17,759 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 8 [2018-09-30 20:12:17,923 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 9 [2018-09-30 20:12:18,091 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 20:12:18,259 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 20:12:18,434 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 20:12:18,599 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 20:12:18,770 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 20:12:18,942 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 20:12:19,118 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 20:12:19,307 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 20:12:19,483 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 20:12:19,669 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 20:12:19,854 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:12:20,024 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 20:12:20,213 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:12:20,394 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 20:12:20,779 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 20:12:20,983 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-09-30 20:12:27,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:27,538 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-30 20:12:27,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 20:12:27,539 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-09-30 20:12:27,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:27,539 INFO L225 Difference]: With dead ends: 69 [2018-09-30 20:12:27,540 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 20:12:27,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=4031, Invalid=11719, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 20:12:27,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 20:12:27,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 20:12:27,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 20:12:27,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 20:12:27,546 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-09-30 20:12:27,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:27,546 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 20:12:27,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 20:12:27,547 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 20:12:27,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 20:12:27,547 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:27,547 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-30 20:12:27,547 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:27,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:27,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1026988024, now seen corresponding path program 32 times [2018-09-30 20:12:27,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:27,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:27,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:27,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:27,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:29,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:29,810 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:29,817 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:12:30,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:12:30,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:30,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:30,579 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:30,579 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2018-09-30 20:12:30,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 20:12:30,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 20:12:30,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=4290, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 20:12:30,580 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-09-30 20:12:30,763 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 8 [2018-09-30 20:12:30,941 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 9 [2018-09-30 20:12:31,136 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 20:12:31,332 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 20:12:31,513 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 20:12:31,688 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 20:12:31,864 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 20:12:32,042 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 20:12:32,228 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 20:12:32,421 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 20:12:32,616 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 20:12:32,811 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 20:12:33,006 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 20:12:33,205 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 20:12:33,413 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:12:33,815 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:12:34,018 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 20:12:34,218 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 20:12:34,418 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 20:12:35,645 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 11 [2018-09-30 20:12:41,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:41,626 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2018-09-30 20:12:41,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 20:12:41,627 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-09-30 20:12:41,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:41,628 INFO L225 Difference]: With dead ends: 71 [2018-09-30 20:12:41,628 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 20:12:41,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=4289, Invalid=12481, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 20:12:41,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 20:12:41,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 20:12:41,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 20:12:41,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 20:12:41,635 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-09-30 20:12:41,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:41,635 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 20:12:41,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 20:12:41,636 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 20:12:41,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 20:12:41,636 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:41,636 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-30 20:12:41,637 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:41,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:41,637 INFO L82 PathProgramCache]: Analyzing trace with hash 906923816, now seen corresponding path program 33 times [2018-09-30 20:12:41,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:41,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:41,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:41,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:41,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:44,159 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:44,159 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:44,167 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:12:44,211 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 20:12:44,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:44,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:44,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:44,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:44,351 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2018-09-30 20:12:44,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 20:12:44,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 20:12:44,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=4556, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 20:12:44,352 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-09-30 20:12:44,540 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 8 [2018-09-30 20:12:44,725 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2018-09-30 20:12:44,911 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 20:12:45,101 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 20:12:45,300 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 20:12:45,500 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 20:12:45,688 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 20:12:45,875 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 20:12:46,076 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 20:12:46,297 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 20:12:46,520 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 20:12:46,723 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 20:12:46,915 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 20:12:47,114 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 20:12:47,321 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 20:12:47,524 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 20:12:47,733 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:12:47,954 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 20:12:48,159 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:12:48,364 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 20:12:48,574 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 20:12:48,786 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 20:12:55,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:55,904 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-30 20:12:55,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 20:12:55,905 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-09-30 20:12:55,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:55,906 INFO L225 Difference]: With dead ends: 73 [2018-09-30 20:12:55,906 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 20:12:55,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=4555, Invalid=13267, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 20:12:55,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 20:12:55,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 20:12:55,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 20:12:55,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 20:12:55,912 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-09-30 20:12:55,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:55,912 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 20:12:55,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 20:12:55,913 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 20:12:55,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 20:12:55,913 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:55,913 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-30 20:12:55,913 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:55,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:55,913 INFO L82 PathProgramCache]: Analyzing trace with hash -324637112, now seen corresponding path program 34 times [2018-09-30 20:12:55,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:55,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:55,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:55,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:55,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:58,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:58,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:58,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:58,594 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:12:59,021 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:12:59,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:59,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:59,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:59,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:59,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2018-09-30 20:12:59,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 20:12:59,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 20:12:59,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=4830, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 20:12:59,414 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-09-30 20:12:59,607 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 8 [2018-09-30 20:12:59,793 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 9 [2018-09-30 20:12:59,984 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 20:13:00,181 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 20:13:00,396 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 20:13:00,591 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 20:13:00,792 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 20:13:00,989 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 20:13:01,194 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 20:13:01,406 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 20:13:01,624 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 20:13:01,854 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 20:13:02,060 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 20:13:02,260 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 20:13:02,479 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 20:13:02,697 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 20:13:02,910 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 20:13:03,133 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 20:13:03,356 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:13:03,581 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 20:13:03,806 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:13:04,025 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 20:13:04,240 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 20:13:11,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:11,875 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-09-30 20:13:11,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 20:13:11,876 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-09-30 20:13:11,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:11,876 INFO L225 Difference]: With dead ends: 75 [2018-09-30 20:13:11,876 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 20:13:11,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=4829, Invalid=14077, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 20:13:11,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 20:13:11,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 20:13:11,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 20:13:11,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 20:13:11,884 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-09-30 20:13:11,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:11,884 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 20:13:11,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 20:13:11,885 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 20:13:11,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 20:13:11,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:11,885 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-30 20:13:11,885 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:11,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:11,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1556284776, now seen corresponding path program 35 times [2018-09-30 20:13:11,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:11,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:11,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:11,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:11,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:14,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:14,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:14,462 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:13:14,844 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 20:13:14,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:14,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:15,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:15,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2018-09-30 20:13:15,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 20:13:15,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 20:13:15,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=5112, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 20:13:15,170 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-09-30 20:13:15,371 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 8 [2018-09-30 20:13:15,564 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 9 [2018-09-30 20:13:15,765 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 20:13:15,973 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 20:13:16,177 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 20:13:16,382 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 20:13:16,591 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 20:13:16,796 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 20:13:17,025 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 20:13:17,263 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 20:13:17,477 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 20:13:17,690 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 20:13:17,909 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 20:13:18,134 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 20:13:18,374 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 20:13:18,596 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 20:13:18,826 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 20:13:19,061 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 20:13:19,292 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 20:13:19,526 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 20:13:19,767 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:13:19,989 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 20:13:20,219 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:13:20,445 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 20:13:28,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:28,775 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-30 20:13:28,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 20:13:28,775 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-09-30 20:13:28,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:28,776 INFO L225 Difference]: With dead ends: 77 [2018-09-30 20:13:28,776 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 20:13:28,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=5111, Invalid=14911, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 20:13:28,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 20:13:28,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 20:13:28,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 20:13:28,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 20:13:28,784 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-09-30 20:13:28,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:28,784 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 20:13:28,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 20:13:28,785 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 20:13:28,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 20:13:28,785 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:28,785 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-30 20:13:28,785 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:28,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:28,786 INFO L82 PathProgramCache]: Analyzing trace with hash 940987528, now seen corresponding path program 36 times [2018-09-30 20:13:28,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:28,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:28,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:28,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:28,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:31,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:31,534 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:31,541 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:13:31,589 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 20:13:31,590 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:31,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:31,765 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:31,765 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2018-09-30 20:13:31,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 20:13:31,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 20:13:31,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=5402, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 20:13:31,766 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-09-30 20:13:32,011 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 8 [2018-09-30 20:13:32,219 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 9 [2018-09-30 20:13:32,453 WARN L178 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 20:13:32,694 WARN L178 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 20:13:32,912 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 20:13:33,124 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 20:13:33,343 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 20:13:33,557 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 20:13:33,783 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 20:13:34,014 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 20:13:34,242 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 20:13:34,470 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 20:13:34,692 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 20:13:34,910 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 20:13:35,148 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 20:13:35,397 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 20:13:35,626 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 20:13:35,873 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 20:13:36,122 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 20:13:36,372 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 20:13:36,618 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 20:13:36,864 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 20:13:37,120 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:13:37,371 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 20:13:37,665 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:13:37,895 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 20:13:46,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:46,552 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-09-30 20:13:46,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 20:13:46,553 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-09-30 20:13:46,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:46,553 INFO L225 Difference]: With dead ends: 79 [2018-09-30 20:13:46,553 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 20:13:46,555 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 [2018-09-30 20:13:46,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 20:13:46,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 20:13:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 20:13:46,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 20:13:46,561 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-09-30 20:13:46,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:46,561 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 20:13:46,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 20:13:46,562 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 20:13:46,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 20:13:46,562 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:46,562 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-30 20:13:46,562 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:46,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:46,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1949148248, now seen corresponding path program 37 times [2018-09-30 20:13:46,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:46,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:46,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:46,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:46,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:49,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:49,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:49,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:13:50,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:50,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:50,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:50,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2018-09-30 20:13:50,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 20:13:50,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 20:13:50,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=5700, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 20:13:50,820 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-09-30 20:13:51,043 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 8 [2018-09-30 20:13:51,252 WARN L178 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 9 [2018-09-30 20:13:51,479 WARN L178 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 20:13:51,713 WARN L178 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 20:13:51,937 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 20:13:52,155 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 20:13:52,386 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 20:13:52,615 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 20:13:52,864 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 20:13:53,128 WARN L178 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 20:13:53,362 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 20:13:53,600 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 20:13:53,833 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 20:13:54,064 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 20:13:54,313 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 20:13:54,557 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 20:13:54,800 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 20:13:55,065 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 20:13:55,317 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 20:13:55,575 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 20:13:55,833 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 20:13:56,083 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 20:13:56,349 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 20:13:56,605 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 20:13:56,863 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:13:57,122 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 20:13:57,386 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:13:57,638 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 20:13:57,908 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 20:13:58,179 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 20:14:06,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:06,530 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-30 20:14:06,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 20:14:06,530 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-09-30 20:14:06,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:06,531 INFO L225 Difference]: With dead ends: 81 [2018-09-30 20:14:06,531 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 20:14:06,533 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 [2018-09-30 20:14:06,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 20:14:06,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 20:14:06,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 20:14:06,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 20:14:06,538 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-09-30 20:14:06,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:06,539 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 20:14:06,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 20:14:06,539 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 20:14:06,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 20:14:06,539 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:06,539 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-30 20:14:06,540 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:06,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:06,540 INFO L82 PathProgramCache]: Analyzing trace with hash -525788472, now seen corresponding path program 38 times [2018-09-30 20:14:06,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:06,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:06,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:06,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:06,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:09,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:09,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:09,790 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:14:10,370 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:14:10,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:10,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:10,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:10,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:10,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2018-09-30 20:14:10,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 20:14:10,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 20:14:10,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=6006, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 20:14:10,882 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-09-30 20:14:11,150 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 8 [2018-09-30 20:14:11,381 WARN L178 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 9 [2018-09-30 20:14:11,620 WARN L178 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 20:14:11,853 WARN L178 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 20:14:12,087 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 20:14:12,311 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 20:14:12,542 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 20:14:12,793 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 20:14:13,045 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 20:14:13,312 WARN L178 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 20:14:13,582 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 20:14:13,840 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 20:14:14,082 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 20:14:14,317 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 20:14:14,586 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 20:14:14,837 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 20:14:15,092 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 20:14:15,362 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 20:14:15,620 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 20:14:15,890 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 20:14:16,161 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 20:14:16,436 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 20:14:16,711 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 20:14:16,987 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 20:14:17,258 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 20:14:17,527 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 20:14:17,796 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:14:18,064 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 20:14:18,334 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:14:18,630 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 20:14:19,177 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 Received shutdown request... [2018-09-30 20:14:21,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:14:21,052 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:14:21,056 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:14:21,056 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:14:21 BoogieIcfgContainer [2018-09-30 20:14:21,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:14:21,057 INFO L168 Benchmark]: Toolchain (without parser) took 256007.26 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -201.3 MB). Free memory was 1.5 GB in the beginning and 949.5 MB in the end (delta: 506.7 MB). Peak memory consumption was 305.4 MB. Max. memory is 7.1 GB. [2018-09-30 20:14:21,057 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:14:21,057 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.09 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:14:21,057 INFO L168 Benchmark]: Boogie Preprocessor took 20.41 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:14:21,058 INFO L168 Benchmark]: RCFGBuilder took 288.48 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:14:21,058 INFO L168 Benchmark]: TraceAbstraction took 255649.53 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -201.3 MB). Free memory was 1.4 GB in the beginning and 949.5 MB in the end (delta: 485.6 MB). Peak memory consumption was 284.2 MB. Max. memory is 7.1 GB. [2018-09-30 20:14:21,059 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.09 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 20.41 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 288.48 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 255649.53 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -201.3 MB). Free memory was 1.4 GB in the beginning and 949.5 MB in the end (delta: 485.6 MB). Peak memory consumption was 284.2 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 41 states, 79 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 118 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 255.5s OverallTime, 39 OverallIterations, 75 TraceHistogramMax, 192.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 115 SDtfs, 0 SDslu, 1427 SDs, 0 SdLazy, 3084 SolverSat, 1443 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4450 GetRequests, 1521 SyntacticMatches, 0 SemanticMatches, 2928 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33889 ImplicationChecksByTransitivity, 233.9s 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, 8.5s SatisfiabilityAnalysisTime, 52.2s 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-0-2018-09-30_20-14-21-066.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-0-2018-09-30_20-14-21-066.csv Completed graceful shutdown