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_PUPT.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-133090d [2018-10-04 09:37:00,642 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 09:37:00,644 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 09:37:00,658 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-04 09:37:00,688 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 09:37:00,710 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 09:37:00,710 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 09:37:00,711 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 09:37:00,712 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 09:37:00,712 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 09:37:00,713 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 09:37:00,713 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 09:37:00,713 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 09:37:00,713 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 09:37:00,713 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 09:37:00,714 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 09:37:00,715 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 09:37:00,715 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 09:37:00,715 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 09:37:00,715 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 09:37:00,716 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 09:37:00,716 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 09:37:00,716 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 09:37:00,717 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 09:37:00,717 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 09:37:00,717 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 09:37:00,717 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 09:37:00,717 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:37:00,717 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 09:37:00,718 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 09:37:00,718 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 09:37:00,718 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 09:37:00,718 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 09:37:00,718 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 09:37:00,719 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 09:37:00,720 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 09:37:00,767 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 09:37:00,780 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 09:37:00,784 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 09:37:00,785 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 09:37:00,786 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 09:37:00,787 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-10-04 09:37:00,787 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl' [2018-10-04 09:37:00,838 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 09:37:00,840 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 09:37:00,841 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 09:37:00,841 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 09:37:00,841 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 09:37:00,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:37:00" (1/1) ... [2018-10-04 09:37:00,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:37:00" (1/1) ... [2018-10-04 09:37:00,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 09:37:00,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 09:37:00,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 09:37:00,882 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 09:37:00,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:37:00" (1/1) ... [2018-10-04 09:37:00,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:37:00" (1/1) ... [2018-10-04 09:37:00,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:37:00" (1/1) ... [2018-10-04 09:37:00,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:37:00" (1/1) ... [2018-10-04 09:37:00,897 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:37:00" (1/1) ... [2018-10-04 09:37:00,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:37:00" (1/1) ... [2018-10-04 09:37:00,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:37:00" (1/1) ... [2018-10-04 09:37:00,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 09:37:00,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 09:37:00,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 09:37:00,903 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 09:37:00,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:37:00" (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 [2018-10-04 09:37:00,977 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-04 09:37:00,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 09:37:00,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 09:37:01,292 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 09:37:01,293 INFO L202 PluginConnector]: Adding new model down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:37:01 BoogieIcfgContainer [2018-10-04 09:37:01,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 09:37:01,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 09:37:01,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 09:37:01,301 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 09:37:01,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:37:00" (1/2) ... [2018-10-04 09:37:01,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@184e2f22 and model type down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 09:37:01, skipping insertion in model container [2018-10-04 09:37:01,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:37:01" (2/2) ... [2018-10-04 09:37:01,309 INFO L112 eAbstractionObserver]: Analyzing ICFG down.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-10-04 09:37:01,317 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 09:37:01,324 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 09:37:01,367 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 09:37:01,368 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 09:37:01,368 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 09:37:01,369 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 09:37:01,369 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 09:37:01,369 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 09:37:01,369 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 09:37:01,369 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 09:37:01,370 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 09:37:01,385 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-10-04 09:37:01,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 09:37:01,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:01,392 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-04 09:37:01,393 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:01,401 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:01,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1951930377, now seen corresponding path program 1 times [2018-10-04 09:37:01,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:01,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:01,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:01,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:37:01,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:01,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:01,543 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:37:01,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 09:37:01,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:37:01,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:37:01,559 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:01,561 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-10-04 09:37:01,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:01,679 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2018-10-04 09:37:01,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:37:01,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-04 09:37:01,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:01,694 INFO L225 Difference]: With dead ends: 23 [2018-10-04 09:37:01,694 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 09:37:01,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 09:37:01,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 09:37:01,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2018-10-04 09:37:01,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 09:37:01,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2018-10-04 09:37:01,752 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 7 [2018-10-04 09:37:01,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:01,753 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2018-10-04 09:37:01,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:37:01,753 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2018-10-04 09:37:01,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 09:37:01,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:01,757 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-04 09:37:01,758 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:01,758 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:01,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1951989959, now seen corresponding path program 1 times [2018-10-04 09:37:01,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:01,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:01,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:01,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:37:01,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:01,865 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:37:01,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 09:37:01,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:37:01,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:37:01,867 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:01,867 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand 4 states. [2018-10-04 09:37:01,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:01,959 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2018-10-04 09:37:01,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:37:01,960 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-10-04 09:37:01,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:01,960 INFO L225 Difference]: With dead ends: 20 [2018-10-04 09:37:01,961 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 09:37:01,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 3 [2018-10-04 09:37:01,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 09:37:01,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 09:37:01,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 09:37:01,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2018-10-04 09:37:01,967 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 7 [2018-10-04 09:37:01,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:01,967 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2018-10-04 09:37:01,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:37:01,968 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2018-10-04 09:37:01,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 09:37:01,968 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:01,968 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 09:37:01,969 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:01,969 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:01,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1455783312, now seen corresponding path program 1 times [2018-10-04 09:37:01,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:01,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:01,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:01,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:37:01,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-04 09:37:02,052 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:37:02,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-04 09:37:02,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:37:02,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:37:02,053 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:02,054 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 4 states. [2018-10-04 09:37:02,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:02,109 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2018-10-04 09:37:02,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:37:02,110 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-10-04 09:37:02,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:02,111 INFO L225 Difference]: With dead ends: 19 [2018-10-04 09:37:02,111 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 09:37:02,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 3 [2018-10-04 09:37:02,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 09:37:02,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 13. [2018-10-04 09:37:02,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 09:37:02,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2018-10-04 09:37:02,117 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2018-10-04 09:37:02,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:02,117 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2018-10-04 09:37:02,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:37:02,119 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2018-10-04 09:37:02,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 09:37:02,119 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:02,120 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 09:37:02,120 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:02,121 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:02,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1455723730, now seen corresponding path program 1 times [2018-10-04 09:37:02,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:02,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:02,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:02,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:37:02,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:02,190 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:37:02,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 09:37:02,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:37:02,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:37:02,192 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:02,192 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 4 states. [2018-10-04 09:37:02,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:02,261 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2018-10-04 09:37:02,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:37:02,264 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-10-04 09:37:02,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:02,264 INFO L225 Difference]: With dead ends: 25 [2018-10-04 09:37:02,265 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 09:37:02,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 2 [2018-10-04 09:37:02,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 09:37:02,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-10-04 09:37:02,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 09:37:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2018-10-04 09:37:02,277 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2018-10-04 09:37:02,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:02,278 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2018-10-04 09:37:02,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:37:02,278 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2018-10-04 09:37:02,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 09:37:02,279 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:02,279 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 09:37:02,279 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:02,279 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:02,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1394403420, now seen corresponding path program 1 times [2018-10-04 09:37:02,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:02,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:02,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:02,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:37:02,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:02,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:02,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:02,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:37:02,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:37:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:02,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:02,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:02,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 09:37:02,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:37:02,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:37:02,813 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:02,813 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 6 states. [2018-10-04 09:37:02,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:02,921 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-10-04 09:37:02,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:37:02,922 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2018-10-04 09:37:02,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:02,923 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:37:02,923 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 09:37:02,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 6 [2018-10-04 09:37:02,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 09:37:02,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 09:37:02,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 09:37:02,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-04 09:37:02,928 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2018-10-04 09:37:02,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:02,929 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-04 09:37:02,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:37:02,929 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-04 09:37:02,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:37:02,930 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:02,930 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 09:37:02,931 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:02,931 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:02,931 INFO L82 PathProgramCache]: Analyzing trace with hash -961145443, now seen corresponding path program 2 times [2018-10-04 09:37:02,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:02,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:02,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:02,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:37:02,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:03,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:03,060 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 [2018-10-04 09:37:03,070 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:37:03,084 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:37:03,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:03,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:03,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:03,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 09:37:03,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 09:37:03,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 09:37:03,184 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:03,184 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2018-10-04 09:37:03,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:03,306 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-10-04 09:37:03,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:37:03,306 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-04 09:37:03,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:03,307 INFO L225 Difference]: With dead ends: 30 [2018-10-04 09:37:03,307 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 09:37:03,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 3 [2018-10-04 09:37:03,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 09:37:03,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2018-10-04 09:37:03,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:37:03,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-04 09:37:03,314 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2018-10-04 09:37:03,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:03,315 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-04 09:37:03,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 09:37:03,315 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-04 09:37:03,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:37:03,316 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:03,316 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-10-04 09:37:03,316 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:03,317 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:03,317 INFO L82 PathProgramCache]: Analyzing trace with hash -552275309, now seen corresponding path program 3 times [2018-10-04 09:37:03,317 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:03,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:03,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:03,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:03,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:03,458 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:03,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:37:03,472 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:37:03,502 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 09:37:03,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:03,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:03,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:03,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:37:03,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:37:03,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:37:03,584 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:03,584 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2018-10-04 09:37:03,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:03,699 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-10-04 09:37:03,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:37:03,700 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-10-04 09:37:03,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:03,701 INFO L225 Difference]: With dead ends: 40 [2018-10-04 09:37:03,701 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 09:37:03,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 7 [2018-10-04 09:37:03,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 09:37:03,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 09:37:03,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 09:37:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-10-04 09:37:03,707 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2018-10-04 09:37:03,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:03,708 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-10-04 09:37:03,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:37:03,708 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-10-04 09:37:03,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 09:37:03,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:03,709 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2018-10-04 09:37:03,709 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:03,709 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:03,709 INFO L82 PathProgramCache]: Analyzing trace with hash 2071906362, now seen corresponding path program 4 times [2018-10-04 09:37:03,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:03,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:03,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:03,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:03,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:04,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:04,053 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 [2018-10-04 09:37:04,069 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:37:04,111 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:37:04,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:04,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:04,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:04,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 09:37:04,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:37:04,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:37:04,533 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:04,533 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2018-10-04 09:37:04,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:04,579 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2018-10-04 09:37:04,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:37:04,579 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-10-04 09:37:04,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:04,580 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:37:04,580 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 09:37:04,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.1s impTime 4 [2018-10-04 09:37:04,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 09:37:04,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2018-10-04 09:37:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 09:37:04,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-04 09:37:04,586 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 18 [2018-10-04 09:37:04,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:04,587 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-04 09:37:04,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:37:04,587 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-04 09:37:04,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 09:37:04,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:04,588 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:37:04,588 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:04,589 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:04,589 INFO L82 PathProgramCache]: Analyzing trace with hash -992407888, now seen corresponding path program 5 times [2018-10-04 09:37:04,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:04,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:04,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:04,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:04,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:04,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:04,713 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 [2018-10-04 09:37:04,729 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:37:04,769 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 09:37:04,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:04,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:04,858 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:04,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:04,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:37:04,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:37:04,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:37:04,882 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:04,883 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2018-10-04 09:37:05,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:05,023 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-10-04 09:37:05,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:37:05,024 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-10-04 09:37:05,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:05,025 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:37:05,025 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 09:37:05,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 9 [2018-10-04 09:37:05,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 09:37:05,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 09:37:05,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:37:05,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-10-04 09:37:05,031 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2018-10-04 09:37:05,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:05,032 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-10-04 09:37:05,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:37:05,032 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-10-04 09:37:05,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 09:37:05,033 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:05,033 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:37:05,033 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:05,033 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:05,033 INFO L82 PathProgramCache]: Analyzing trace with hash 390441321, now seen corresponding path program 6 times [2018-10-04 09:37:05,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:05,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:05,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:05,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:05,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:05,191 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:05,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:05,191 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 [2018-10-04 09:37:05,200 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:37:05,218 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-04 09:37:05,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:05,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:05,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:05,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:37:05,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:37:05,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:37:05,324 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:05,324 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2018-10-04 09:37:05,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:05,386 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2018-10-04 09:37:05,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:37:05,386 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-10-04 09:37:05,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:05,387 INFO L225 Difference]: With dead ends: 40 [2018-10-04 09:37:05,388 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 09:37:05,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 5 [2018-10-04 09:37:05,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 09:37:05,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2018-10-04 09:37:05,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:37:05,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-10-04 09:37:05,395 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2018-10-04 09:37:05,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:05,395 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-10-04 09:37:05,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:37:05,395 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-10-04 09:37:05,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 09:37:05,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:05,396 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2018-10-04 09:37:05,397 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:05,397 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:05,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1927135327, now seen corresponding path program 7 times [2018-10-04 09:37:05,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:05,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:05,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:05,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:05,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:05,585 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:05,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:05,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:37:05,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:37:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:05,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:05,721 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:05,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:05,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 09:37:05,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:37:05,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:37:05,743 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:05,743 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 12 states. [2018-10-04 09:37:05,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:05,902 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2018-10-04 09:37:05,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 09:37:05,903 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2018-10-04 09:37:05,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:05,904 INFO L225 Difference]: With dead ends: 58 [2018-10-04 09:37:05,904 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:37:05,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 11 [2018-10-04 09:37:05,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:37:05,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 09:37:05,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 09:37:05,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-04 09:37:05,911 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-10-04 09:37:05,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:05,912 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-04 09:37:05,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:37:05,912 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-04 09:37:05,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 09:37:05,913 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:05,913 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2018-10-04 09:37:05,913 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:05,914 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:05,914 INFO L82 PathProgramCache]: Analyzing trace with hash -906890938, now seen corresponding path program 8 times [2018-10-04 09:37:05,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:05,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:05,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:05,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:37:05,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:06,182 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:06,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:06,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:37:06,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:37:06,222 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:37:06,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:06,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:06,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:06,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:37:06,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:37:06,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:37:06,451 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:06,451 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 8 states. [2018-10-04 09:37:06,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:06,599 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2018-10-04 09:37:06,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:37:06,599 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2018-10-04 09:37:06,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:06,600 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:37:06,600 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:37:06,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 6 [2018-10-04 09:37:06,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:37:06,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-10-04 09:37:06,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 09:37:06,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-10-04 09:37:06,608 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2018-10-04 09:37:06,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:06,609 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-10-04 09:37:06,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:37:06,609 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-10-04 09:37:06,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 09:37:06,610 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:06,610 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2018-10-04 09:37:06,610 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:06,610 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:06,611 INFO L82 PathProgramCache]: Analyzing trace with hash -466038340, now seen corresponding path program 9 times [2018-10-04 09:37:06,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:06,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:06,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:06,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:06,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 60 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:06,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:06,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:37:06,782 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:37:06,822 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 09:37:06,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:06,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 60 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:06,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:06,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 09:37:06,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:37:06,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:37:06,969 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:06,969 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 14 states. [2018-10-04 09:37:07,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:07,187 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2018-10-04 09:37:07,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 09:37:07,187 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2018-10-04 09:37:07,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:07,188 INFO L225 Difference]: With dead ends: 67 [2018-10-04 09:37:07,188 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 09:37:07,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 13 [2018-10-04 09:37:07,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 09:37:07,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 09:37:07,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 09:37:07,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-10-04 09:37:07,196 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2018-10-04 09:37:07,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:07,196 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-10-04 09:37:07,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:37:07,196 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-10-04 09:37:07,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 09:37:07,197 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:07,197 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1] [2018-10-04 09:37:07,198 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:07,198 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:07,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1282545973, now seen corresponding path program 10 times [2018-10-04 09:37:07,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:07,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:07,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:07,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:07,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:07,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:07,308 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 [2018-10-04 09:37:07,319 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:37:07,357 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:37:07,357 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:07,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:07,937 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:07,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:07,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:37:07,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:37:07,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:37:07,958 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:07,959 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 9 states. [2018-10-04 09:37:08,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:08,011 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2018-10-04 09:37:08,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:37:08,012 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-10-04 09:37:08,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:08,013 INFO L225 Difference]: With dead ends: 50 [2018-10-04 09:37:08,013 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 09:37:08,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.0s impTime 7 [2018-10-04 09:37:08,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 09:37:08,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2018-10-04 09:37:08,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 09:37:08,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-10-04 09:37:08,023 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2018-10-04 09:37:08,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:08,023 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-10-04 09:37:08,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:37:08,023 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-10-04 09:37:08,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 09:37:08,024 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:08,025 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2018-10-04 09:37:08,025 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:08,025 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:08,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1500867115, now seen corresponding path program 11 times [2018-10-04 09:37:08,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:08,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:08,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:08,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:08,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:08,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:08,194 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 [2018-10-04 09:37:08,220 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:37:08,256 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 09:37:08,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:08,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:08,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:08,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 09:37:08,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 09:37:08,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 09:37:08,493 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:08,493 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 16 states. [2018-10-04 09:37:08,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:08,654 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2018-10-04 09:37:08,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 09:37:08,654 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2018-10-04 09:37:08,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:08,656 INFO L225 Difference]: With dead ends: 76 [2018-10-04 09:37:08,656 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:37:08,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 15 [2018-10-04 09:37:08,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:37:08,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 09:37:08,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 09:37:08,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-10-04 09:37:08,664 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2018-10-04 09:37:08,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:08,664 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-10-04 09:37:08,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 09:37:08,664 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-10-04 09:37:08,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 09:37:08,665 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:08,665 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1] [2018-10-04 09:37:08,665 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:08,666 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:08,666 INFO L82 PathProgramCache]: Analyzing trace with hash 594208338, now seen corresponding path program 12 times [2018-10-04 09:37:08,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:08,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:08,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:08,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:08,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 40 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:08,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:08,831 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 [2018-10-04 09:37:08,839 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:37:08,859 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:37:08,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:08,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 40 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:09,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:09,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:37:09,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:37:09,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:37:09,169 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:09,169 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 10 states. [2018-10-04 09:37:09,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:09,257 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2018-10-04 09:37:09,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:37:09,258 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2018-10-04 09:37:09,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:09,259 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:37:09,259 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:37:09,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.0s impTime 8 [2018-10-04 09:37:09,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:37:09,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2018-10-04 09:37:09,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 09:37:09,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-10-04 09:37:09,267 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 38 [2018-10-04 09:37:09,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:09,268 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-10-04 09:37:09,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:37:09,268 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-10-04 09:37:09,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 09:37:09,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:09,269 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2018-10-04 09:37:09,269 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:09,269 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:09,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1054367944, now seen corresponding path program 13 times [2018-10-04 09:37:09,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:09,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:09,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:09,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:09,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 112 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:09,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:09,447 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 [2018-10-04 09:37:09,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:37:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:09,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:10,003 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 112 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:10,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:10,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 09:37:10,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 09:37:10,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 09:37:10,024 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:10,025 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 18 states. [2018-10-04 09:37:10,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:10,200 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2018-10-04 09:37:10,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 09:37:10,201 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2018-10-04 09:37:10,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:10,201 INFO L225 Difference]: With dead ends: 85 [2018-10-04 09:37:10,201 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 09:37:10,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.1s impTime 17 [2018-10-04 09:37:10,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 09:37:10,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 09:37:10,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 09:37:10,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-10-04 09:37:10,209 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 42 [2018-10-04 09:37:10,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:10,210 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-10-04 09:37:10,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 09:37:10,210 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-10-04 09:37:10,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 09:37:10,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:10,211 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2018-10-04 09:37:10,211 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:10,211 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:10,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1098736897, now seen corresponding path program 14 times [2018-10-04 09:37:10,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:10,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:10,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:10,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:37:10,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 50 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:10,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:10,389 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:37:10,399 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:37:10,417 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:37:10,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:10,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 50 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:10,537 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:10,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:37:10,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:37:10,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:37:10,538 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:10,538 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 11 states. [2018-10-04 09:37:10,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:10,676 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2018-10-04 09:37:10,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:37:10,677 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2018-10-04 09:37:10,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:10,677 INFO L225 Difference]: With dead ends: 60 [2018-10-04 09:37:10,677 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 09:37:10,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 9 [2018-10-04 09:37:10,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 09:37:10,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2018-10-04 09:37:10,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 09:37:10,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-10-04 09:37:10,686 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 43 [2018-10-04 09:37:10,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:10,687 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-10-04 09:37:10,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:37:10,687 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-10-04 09:37:10,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 09:37:10,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:10,688 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2018-10-04 09:37:10,688 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:10,688 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:10,688 INFO L82 PathProgramCache]: Analyzing trace with hash -48369673, now seen corresponding path program 15 times [2018-10-04 09:37:10,688 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:10,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:10,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:10,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:10,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 144 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:11,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:11,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:37:11,014 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:37:11,045 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:37:11,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:11,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 144 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:11,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:11,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 09:37:11,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:37:11,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:37:11,176 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:11,176 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 20 states. [2018-10-04 09:37:11,695 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 7 [2018-10-04 09:37:11,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:11,758 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2018-10-04 09:37:11,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 09:37:11,758 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2018-10-04 09:37:11,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:11,759 INFO L225 Difference]: With dead ends: 94 [2018-10-04 09:37:11,759 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:37:11,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 7 [2018-10-04 09:37:11,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:37:11,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 09:37:11,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 09:37:11,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2018-10-04 09:37:11,766 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 47 [2018-10-04 09:37:11,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:11,766 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2018-10-04 09:37:11,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:37:11,767 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2018-10-04 09:37:11,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 09:37:11,767 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:11,767 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1] [2018-10-04 09:37:11,768 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:11,768 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:11,768 INFO L82 PathProgramCache]: Analyzing trace with hash 239052638, now seen corresponding path program 16 times [2018-10-04 09:37:11,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:11,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:11,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:11,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:11,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:11,955 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 61 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:11,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:11,955 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 [2018-10-04 09:37:11,962 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:37:11,986 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:37:11,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:11,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 61 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:12,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:12,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 09:37:12,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:37:12,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:37:12,087 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:12,087 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 12 states. [2018-10-04 09:37:12,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:12,151 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2018-10-04 09:37:12,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 09:37:12,151 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2018-10-04 09:37:12,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:12,152 INFO L225 Difference]: With dead ends: 65 [2018-10-04 09:37:12,152 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:37:12,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 10 [2018-10-04 09:37:12,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:37:12,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-10-04 09:37:12,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 09:37:12,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-10-04 09:37:12,160 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 48 [2018-10-04 09:37:12,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:12,161 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-10-04 09:37:12,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:37:12,161 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-10-04 09:37:12,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 09:37:12,162 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:12,162 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2018-10-04 09:37:12,162 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:12,162 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:12,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1074641876, now seen corresponding path program 17 times [2018-10-04 09:37:12,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:12,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:12,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:12,163 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:12,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 180 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:12,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:12,471 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 [2018-10-04 09:37:12,478 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:37:12,511 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 09:37:12,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:12,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:12,620 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 180 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:12,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:12,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 09:37:12,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 09:37:12,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 09:37:12,642 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:12,642 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2018-10-04 09:37:13,167 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 7 [2018-10-04 09:37:13,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:13,237 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2018-10-04 09:37:13,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 09:37:13,237 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2018-10-04 09:37:13,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:13,238 INFO L225 Difference]: With dead ends: 103 [2018-10-04 09:37:13,238 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 09:37:13,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 9 [2018-10-04 09:37:13,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 09:37:13,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 09:37:13,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 09:37:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-04 09:37:13,245 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2018-10-04 09:37:13,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:13,245 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-04 09:37:13,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 09:37:13,246 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-04 09:37:13,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 09:37:13,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:13,246 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2018-10-04 09:37:13,247 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:13,247 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:13,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1305899827, now seen corresponding path program 18 times [2018-10-04 09:37:13,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:13,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:13,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:13,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:13,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 73 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:13,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:13,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:37:13,482 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:37:13,538 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-04 09:37:13,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:13,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:13,674 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 73 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:13,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:13,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 09:37:13,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 09:37:13,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 09:37:13,695 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:13,695 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 13 states. [2018-10-04 09:37:13,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:13,759 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2018-10-04 09:37:13,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 09:37:13,762 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2018-10-04 09:37:13,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:13,763 INFO L225 Difference]: With dead ends: 70 [2018-10-04 09:37:13,763 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 09:37:13,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 11 [2018-10-04 09:37:13,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 09:37:13,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2018-10-04 09:37:13,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 09:37:13,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-10-04 09:37:13,772 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 53 [2018-10-04 09:37:13,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:13,772 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-10-04 09:37:13,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 09:37:13,772 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-10-04 09:37:13,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 09:37:13,773 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:13,773 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2018-10-04 09:37:13,773 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:13,774 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:13,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1754878403, now seen corresponding path program 19 times [2018-10-04 09:37:13,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:13,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:13,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:13,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:13,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:13,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 220 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:14,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:14,538 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 [2018-10-04 09:37:14,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:37:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:14,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 220 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:14,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:14,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 09:37:14,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 09:37:14,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 09:37:14,720 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:14,720 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 24 states. [2018-10-04 09:37:14,914 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 7 [2018-10-04 09:37:15,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:15,048 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2018-10-04 09:37:15,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 09:37:15,049 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2018-10-04 09:37:15,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:15,049 INFO L225 Difference]: With dead ends: 112 [2018-10-04 09:37:15,049 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 09:37:15,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 11 [2018-10-04 09:37:15,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 09:37:15,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 09:37:15,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 09:37:15,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-10-04 09:37:15,057 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 57 [2018-10-04 09:37:15,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:15,057 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-10-04 09:37:15,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 09:37:15,057 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-10-04 09:37:15,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 09:37:15,058 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:15,058 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2018-10-04 09:37:15,058 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:15,058 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:15,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1471794070, now seen corresponding path program 20 times [2018-10-04 09:37:15,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:15,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:15,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:15,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:37:15,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 86 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:15,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:15,267 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 [2018-10-04 09:37:15,274 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:37:15,300 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:37:15,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:15,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:15,399 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 86 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:15,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:15,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 09:37:15,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:37:15,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:37:15,420 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:15,420 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 14 states. [2018-10-04 09:37:15,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:15,558 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2018-10-04 09:37:15,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 09:37:15,558 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2018-10-04 09:37:15,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:15,559 INFO L225 Difference]: With dead ends: 75 [2018-10-04 09:37:15,559 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 09:37:15,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 12 [2018-10-04 09:37:15,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 09:37:15,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2018-10-04 09:37:15,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 09:37:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-10-04 09:37:15,567 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 58 [2018-10-04 09:37:15,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:15,569 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-10-04 09:37:15,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:37:15,569 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-10-04 09:37:15,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 09:37:15,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:15,570 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1] [2018-10-04 09:37:15,570 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:15,570 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:15,571 INFO L82 PathProgramCache]: Analyzing trace with hash 716104416, now seen corresponding path program 21 times [2018-10-04 09:37:15,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:15,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:15,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:15,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:15,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 264 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:16,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:16,721 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 [2018-10-04 09:37:16,733 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:37:16,768 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 09:37:16,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:16,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 264 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:16,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:16,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 09:37:16,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 09:37:16,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 09:37:16,929 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:16,929 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 26 states. [2018-10-04 09:37:17,070 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 7 [2018-10-04 09:37:17,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:17,212 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2018-10-04 09:37:17,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 09:37:17,212 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2018-10-04 09:37:17,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:17,212 INFO L225 Difference]: With dead ends: 121 [2018-10-04 09:37:17,213 INFO L226 Difference]: Without dead ends: 66 [2018-10-04 09:37:17,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime 12 [2018-10-04 09:37:17,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-04 09:37:17,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-04 09:37:17,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 09:37:17,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-10-04 09:37:17,218 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2018-10-04 09:37:17,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:17,218 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-10-04 09:37:17,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 09:37:17,218 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-10-04 09:37:17,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 09:37:17,219 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:17,219 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 1, 1, 1, 1, 1] [2018-10-04 09:37:17,219 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:17,219 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:17,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1699180391, now seen corresponding path program 22 times [2018-10-04 09:37:17,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:17,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:17,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:17,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:17,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:18,229 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 100 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:18,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:18,230 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 [2018-10-04 09:37:18,237 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:37:18,286 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:37:18,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:18,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 100 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:18,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:18,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 09:37:18,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 09:37:18,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 09:37:18,496 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:18,496 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 15 states. [2018-10-04 09:37:18,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:18,574 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2018-10-04 09:37:18,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 09:37:18,574 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2018-10-04 09:37:18,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:18,575 INFO L225 Difference]: With dead ends: 80 [2018-10-04 09:37:18,575 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 09:37:18,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.6s impTime 13 [2018-10-04 09:37:18,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 09:37:18,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2018-10-04 09:37:18,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 09:37:18,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-10-04 09:37:18,582 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2018-10-04 09:37:18,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:18,583 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-10-04 09:37:18,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 09:37:18,583 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-10-04 09:37:18,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-04 09:37:18,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:18,583 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1] [2018-10-04 09:37:18,583 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:18,584 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:18,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1490448497, now seen corresponding path program 23 times [2018-10-04 09:37:18,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:18,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:18,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:18,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:18,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 312 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:18,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:18,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:37:18,925 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:37:18,965 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 09:37:18,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:18,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:19,081 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 312 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:19,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:19,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 09:37:19,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 09:37:19,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 09:37:19,102 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:19,102 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 28 states. [2018-10-04 09:37:19,241 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 7 [2018-10-04 09:37:19,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:19,497 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2018-10-04 09:37:19,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 09:37:19,498 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 67 [2018-10-04 09:37:19,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:19,499 INFO L225 Difference]: With dead ends: 130 [2018-10-04 09:37:19,499 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 09:37:19,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 15 [2018-10-04 09:37:19,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 09:37:19,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 09:37:19,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 09:37:19,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2018-10-04 09:37:19,505 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2018-10-04 09:37:19,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:19,505 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2018-10-04 09:37:19,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 09:37:19,505 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2018-10-04 09:37:19,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 09:37:19,505 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:19,506 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 1, 1, 1, 1, 1] [2018-10-04 09:37:19,506 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:19,506 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:19,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1188334966, now seen corresponding path program 24 times [2018-10-04 09:37:19,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:19,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:19,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:19,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:19,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 115 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:19,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:19,804 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 [2018-10-04 09:37:19,816 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:37:19,860 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 09:37:19,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:19,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:19,977 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 115 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:19,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:19,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 09:37:19,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 09:37:19,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 09:37:19,998 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:19,998 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 16 states. [2018-10-04 09:37:20,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:20,081 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2018-10-04 09:37:20,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 09:37:20,082 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2018-10-04 09:37:20,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:20,083 INFO L225 Difference]: With dead ends: 85 [2018-10-04 09:37:20,083 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 09:37:20,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 14 [2018-10-04 09:37:20,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 09:37:20,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-10-04 09:37:20,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 09:37:20,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2018-10-04 09:37:20,090 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 68 [2018-10-04 09:37:20,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:20,090 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2018-10-04 09:37:20,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 09:37:20,091 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2018-10-04 09:37:20,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 09:37:20,091 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:20,091 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1] [2018-10-04 09:37:20,092 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:20,092 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:20,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1190013460, now seen corresponding path program 25 times [2018-10-04 09:37:20,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:20,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:20,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:20,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:20,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:20,498 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 364 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:20,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:20,499 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 [2018-10-04 09:37:20,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:37:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:20,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 364 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:20,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:20,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 09:37:20,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 09:37:20,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 09:37:20,702 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:20,702 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 30 states. [2018-10-04 09:37:20,993 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:37:21,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:21,245 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2018-10-04 09:37:21,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 09:37:21,245 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 72 [2018-10-04 09:37:21,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:21,246 INFO L225 Difference]: With dead ends: 139 [2018-10-04 09:37:21,246 INFO L226 Difference]: Without dead ends: 76 [2018-10-04 09:37:21,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 14 [2018-10-04 09:37:21,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-04 09:37:21,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-04 09:37:21,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 09:37:21,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-10-04 09:37:21,255 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 72 [2018-10-04 09:37:21,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:21,255 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-10-04 09:37:21,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 09:37:21,255 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-10-04 09:37:21,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-04 09:37:21,256 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:21,256 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 1, 1, 1, 1, 1] [2018-10-04 09:37:21,256 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:21,257 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:21,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1746112411, now seen corresponding path program 26 times [2018-10-04 09:37:21,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:21,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:21,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:21,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:37:21,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 131 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:21,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:21,795 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 [2018-10-04 09:37:21,805 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:37:21,840 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:37:21,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:21,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 131 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:21,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:21,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 09:37:21,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 09:37:21,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 09:37:21,989 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:21,990 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 17 states. [2018-10-04 09:37:22,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:22,244 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2018-10-04 09:37:22,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 09:37:22,244 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2018-10-04 09:37:22,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:22,245 INFO L225 Difference]: With dead ends: 90 [2018-10-04 09:37:22,245 INFO L226 Difference]: Without dead ends: 84 [2018-10-04 09:37:22,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.2s impTime 15 [2018-10-04 09:37:22,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-04 09:37:22,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2018-10-04 09:37:22,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 09:37:22,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-10-04 09:37:22,253 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2018-10-04 09:37:22,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:22,254 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-10-04 09:37:22,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 09:37:22,254 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-10-04 09:37:22,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-04 09:37:22,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:22,255 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1] [2018-10-04 09:37:22,255 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:22,255 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:22,255 INFO L82 PathProgramCache]: Analyzing trace with hash 613460315, now seen corresponding path program 27 times [2018-10-04 09:37:22,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:22,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:22,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:22,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:22,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 420 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:22,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:22,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:37:22,639 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:37:22,688 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 09:37:22,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:22,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 420 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:22,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:22,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 09:37:22,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 09:37:22,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 09:37:22,844 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:22,844 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 32 states. [2018-10-04 09:37:22,937 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:37:23,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:23,051 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2018-10-04 09:37:23,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 09:37:23,052 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 77 [2018-10-04 09:37:23,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:23,053 INFO L225 Difference]: With dead ends: 148 [2018-10-04 09:37:23,053 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 09:37:23,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 16 [2018-10-04 09:37:23,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 09:37:23,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 09:37:23,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 09:37:23,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2018-10-04 09:37:23,059 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2018-10-04 09:37:23,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:23,060 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2018-10-04 09:37:23,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 09:37:23,060 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2018-10-04 09:37:23,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 09:37:23,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:23,060 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2018-10-04 09:37:23,060 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:23,061 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:23,061 INFO L82 PathProgramCache]: Analyzing trace with hash 381727362, now seen corresponding path program 28 times [2018-10-04 09:37:23,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:23,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:23,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:23,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:23,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:23,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 148 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:23,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:23,396 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 [2018-10-04 09:37:23,403 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:37:23,441 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:37:23,441 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:23,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:23,579 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 148 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:23,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:23,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 09:37:23,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 09:37:23,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 09:37:23,600 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:23,600 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 18 states. [2018-10-04 09:37:23,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:23,686 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2018-10-04 09:37:23,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 09:37:23,687 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2018-10-04 09:37:23,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:23,687 INFO L225 Difference]: With dead ends: 95 [2018-10-04 09:37:23,688 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 09:37:23,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 16 [2018-10-04 09:37:23,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 09:37:23,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2018-10-04 09:37:23,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 09:37:23,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-10-04 09:37:23,697 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 78 [2018-10-04 09:37:23,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:23,697 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-10-04 09:37:23,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 09:37:23,697 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-10-04 09:37:23,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 09:37:23,698 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:23,698 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 1, 1, 1, 1, 1] [2018-10-04 09:37:23,698 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:23,698 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:23,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1123248904, now seen corresponding path program 29 times [2018-10-04 09:37:23,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:23,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:23,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:23,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:23,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:24,031 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 480 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:24,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:24,032 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 [2018-10-04 09:37:24,039 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:37:24,262 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 09:37:24,263 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:24,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 480 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:24,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:24,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 09:37:24,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 09:37:24,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 09:37:24,601 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:24,601 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 34 states. [2018-10-04 09:37:24,736 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:37:25,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:25,090 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2018-10-04 09:37:25,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 09:37:25,091 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 82 [2018-10-04 09:37:25,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:25,091 INFO L225 Difference]: With dead ends: 157 [2018-10-04 09:37:25,091 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 09:37:25,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.3s impTime 18 [2018-10-04 09:37:25,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 09:37:25,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-04 09:37:25,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 09:37:25,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-10-04 09:37:25,101 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 82 [2018-10-04 09:37:25,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:25,101 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-10-04 09:37:25,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 09:37:25,101 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-10-04 09:37:25,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 09:37:25,102 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:25,102 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 1, 1, 1, 1, 1] [2018-10-04 09:37:25,102 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:25,102 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:25,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1191652401, now seen corresponding path program 30 times [2018-10-04 09:37:25,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:25,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:25,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:25,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:25,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 166 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:25,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:25,620 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:37:25,628 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:37:25,677 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 09:37:25,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:25,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 166 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:25,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:25,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 09:37:25,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 09:37:25,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 09:37:25,844 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:25,844 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 19 states. [2018-10-04 09:37:25,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:25,965 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2018-10-04 09:37:25,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 09:37:25,966 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 83 [2018-10-04 09:37:25,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:25,967 INFO L225 Difference]: With dead ends: 100 [2018-10-04 09:37:25,967 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 09:37:25,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.2s impTime 17 [2018-10-04 09:37:25,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 09:37:25,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2018-10-04 09:37:25,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-04 09:37:25,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2018-10-04 09:37:25,977 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 83 [2018-10-04 09:37:25,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:25,977 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2018-10-04 09:37:25,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 09:37:25,977 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2018-10-04 09:37:25,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-04 09:37:25,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:25,978 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1] [2018-10-04 09:37:25,978 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:25,979 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:25,979 INFO L82 PathProgramCache]: Analyzing trace with hash 219193127, now seen corresponding path program 31 times [2018-10-04 09:37:25,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:25,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:25,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:25,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:25,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:26,450 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 544 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:26,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:26,451 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 [2018-10-04 09:37:26,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:37:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:26,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 544 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:26,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:26,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 09:37:26,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 09:37:26,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 09:37:26,829 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:26,830 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 36 states. [2018-10-04 09:37:27,072 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:37:27,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:27,549 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2018-10-04 09:37:27,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 09:37:27,549 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 87 [2018-10-04 09:37:27,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:27,550 INFO L225 Difference]: With dead ends: 166 [2018-10-04 09:37:27,550 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 09:37:27,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 20 [2018-10-04 09:37:27,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 09:37:27,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 09:37:27,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 09:37:27,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-10-04 09:37:27,557 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 87 [2018-10-04 09:37:27,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:27,557 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-10-04 09:37:27,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 09:37:27,558 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-10-04 09:37:27,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 09:37:27,558 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:27,558 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 1, 1, 1, 1, 1] [2018-10-04 09:37:27,558 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:27,558 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:27,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1134517362, now seen corresponding path program 32 times [2018-10-04 09:37:27,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:27,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:27,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:27,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:37:27,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 185 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:27,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:27,800 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 [2018-10-04 09:37:27,807 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:37:27,852 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:37:27,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:27,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:28,160 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 185 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:28,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:28,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 09:37:28,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:37:28,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:37:28,181 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:28,181 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 20 states. [2018-10-04 09:37:28,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:28,293 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2018-10-04 09:37:28,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 09:37:28,294 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 88 [2018-10-04 09:37:28,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:28,294 INFO L225 Difference]: With dead ends: 105 [2018-10-04 09:37:28,294 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 09:37:28,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 18 [2018-10-04 09:37:28,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 09:37:28,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-10-04 09:37:28,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 09:37:28,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-10-04 09:37:28,303 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 88 [2018-10-04 09:37:28,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:28,303 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-10-04 09:37:28,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:37:28,304 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-10-04 09:37:28,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 09:37:28,304 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:28,304 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 1, 1, 1, 1, 1] [2018-10-04 09:37:28,304 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:28,304 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:28,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1074454524, now seen corresponding path program 33 times [2018-10-04 09:37:28,304 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:28,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:28,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:28,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:28,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:28,794 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 612 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:28,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:28,795 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 [2018-10-04 09:37:28,803 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:37:28,857 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 09:37:28,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:28,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 612 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:29,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:29,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 09:37:29,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 09:37:29,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 09:37:29,030 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:29,030 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 38 states. [2018-10-04 09:37:29,159 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:37:29,761 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:37:29,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:29,765 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2018-10-04 09:37:29,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 09:37:29,765 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 92 [2018-10-04 09:37:29,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:29,765 INFO L225 Difference]: With dead ends: 175 [2018-10-04 09:37:29,765 INFO L226 Difference]: Without dead ends: 96 [2018-10-04 09:37:29,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 8 [2018-10-04 09:37:29,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-04 09:37:29,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-04 09:37:29,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-04 09:37:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2018-10-04 09:37:29,773 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 92 [2018-10-04 09:37:29,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:29,773 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2018-10-04 09:37:29,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 09:37:29,773 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2018-10-04 09:37:29,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-04 09:37:29,774 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:29,774 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 1, 1, 1, 1, 1] [2018-10-04 09:37:29,774 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:29,774 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:29,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1513438211, now seen corresponding path program 34 times [2018-10-04 09:37:29,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:29,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:29,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:29,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:29,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:29,973 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:37:30,004 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 205 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:30,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:30,004 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 [2018-10-04 09:37:30,011 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:37:30,052 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:37:30,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:30,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 205 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:30,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:30,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 09:37:30,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 09:37:30,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 09:37:30,686 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:30,686 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 21 states. [2018-10-04 09:37:30,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:30,792 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2018-10-04 09:37:30,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 09:37:30,793 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2018-10-04 09:37:30,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:30,793 INFO L225 Difference]: With dead ends: 110 [2018-10-04 09:37:30,793 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 09:37:30,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.0s impTime 6 [2018-10-04 09:37:30,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 09:37:30,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2018-10-04 09:37:30,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 09:37:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-10-04 09:37:30,806 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2018-10-04 09:37:30,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:30,806 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-10-04 09:37:30,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 09:37:30,807 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-10-04 09:37:30,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-04 09:37:30,807 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:30,807 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 1, 1, 1, 1, 1] [2018-10-04 09:37:30,807 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:30,808 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:30,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1385467661, now seen corresponding path program 35 times [2018-10-04 09:37:30,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:30,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:30,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:30,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:30,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:32,058 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:37:32,527 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:37:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 684 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:32,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:32,600 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 [2018-10-04 09:37:32,607 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:37:32,663 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 09:37:32,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:32,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 684 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:32,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:32,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 09:37:32,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 09:37:32,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 09:37:32,871 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:32,871 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 40 states. [2018-10-04 09:37:34,094 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:37:34,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:34,311 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2018-10-04 09:37:34,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 09:37:34,312 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 97 [2018-10-04 09:37:34,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:34,313 INFO L225 Difference]: With dead ends: 184 [2018-10-04 09:37:34,313 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 09:37:34,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.6s impTime 13 [2018-10-04 09:37:34,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 09:37:34,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 09:37:34,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 09:37:34,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-10-04 09:37:34,324 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 97 [2018-10-04 09:37:34,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:34,324 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-10-04 09:37:34,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 09:37:34,324 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-10-04 09:37:34,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 09:37:34,325 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:34,325 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 1, 1, 1, 1, 1] [2018-10-04 09:37:34,325 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:34,325 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:34,325 INFO L82 PathProgramCache]: Analyzing trace with hash -209035110, now seen corresponding path program 36 times [2018-10-04 09:37:34,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:34,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:34,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:34,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:34,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:34,579 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:37:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 226 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:34,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:34,619 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:37:34,626 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:37:34,690 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 09:37:34,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:34,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:34,871 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 226 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:34,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:34,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 09:37:34,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 09:37:34,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 09:37:34,897 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:34,897 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 22 states. [2018-10-04 09:37:35,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:35,001 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2018-10-04 09:37:35,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 09:37:35,001 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2018-10-04 09:37:35,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:35,002 INFO L225 Difference]: With dead ends: 115 [2018-10-04 09:37:35,003 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 09:37:35,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 7 [2018-10-04 09:37:35,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 09:37:35,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2018-10-04 09:37:35,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 09:37:35,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-10-04 09:37:35,015 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 98 [2018-10-04 09:37:35,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:35,016 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-10-04 09:37:35,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 09:37:35,016 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-10-04 09:37:35,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 09:37:35,016 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:35,017 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 1, 1, 1, 1, 1] [2018-10-04 09:37:35,017 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:35,017 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:35,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1566476528, now seen corresponding path program 37 times [2018-10-04 09:37:35,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:35,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:35,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:35,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:35,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:35,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:36,621 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:37:37,045 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:37:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 760 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:37,175 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:37,176 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 [2018-10-04 09:37:37,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:37:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:37,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 760 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:37,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:37,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 09:37:37,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 09:37:37,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 09:37:37,411 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:37,411 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 42 states. [2018-10-04 09:37:39,345 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:37:40,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:40,157 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2018-10-04 09:37:40,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 09:37:40,157 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 102 [2018-10-04 09:37:40,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:40,158 INFO L225 Difference]: With dead ends: 193 [2018-10-04 09:37:40,158 INFO L226 Difference]: Without dead ends: 106 [2018-10-04 09:37:40,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.7s impTime 14 [2018-10-04 09:37:40,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-04 09:37:40,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-04 09:37:40,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 09:37:40,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-10-04 09:37:40,169 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 102 [2018-10-04 09:37:40,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:40,170 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-10-04 09:37:40,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 09:37:40,170 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-10-04 09:37:40,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-04 09:37:40,170 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:40,171 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 1, 1, 1, 1, 1] [2018-10-04 09:37:40,171 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:40,171 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:40,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1920546761, now seen corresponding path program 38 times [2018-10-04 09:37:40,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:40,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:40,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:40,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:37:40,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:40,538 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:37:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 248 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:40,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:40,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:37:40,599 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:37:40,646 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:37:40,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:40,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:40,850 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 248 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:40,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:40,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 09:37:40,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 09:37:40,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 09:37:40,871 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:40,871 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 23 states. [2018-10-04 09:37:40,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:40,979 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2018-10-04 09:37:40,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 09:37:40,980 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 103 [2018-10-04 09:37:40,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:40,981 INFO L225 Difference]: With dead ends: 120 [2018-10-04 09:37:40,981 INFO L226 Difference]: Without dead ends: 114 [2018-10-04 09:37:40,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 8 [2018-10-04 09:37:40,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-04 09:37:40,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2018-10-04 09:37:40,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-04 09:37:40,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-10-04 09:37:40,991 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 103 [2018-10-04 09:37:40,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:40,991 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-10-04 09:37:40,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 09:37:40,992 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-10-04 09:37:40,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 09:37:40,992 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:40,992 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 1, 1, 1, 1, 1] [2018-10-04 09:37:40,992 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:40,992 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:40,992 INFO L82 PathProgramCache]: Analyzing trace with hash -756867393, now seen corresponding path program 39 times [2018-10-04 09:37:40,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:40,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:40,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:40,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:40,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:42,055 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:37:42,458 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:37:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 840 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:42,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:42,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:37:42,551 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:37:42,613 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 09:37:42,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:42,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 840 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:43,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:43,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 09:37:43,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 09:37:43,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 09:37:43,759 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:43,759 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 44 states. [2018-10-04 09:37:44,537 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:37:45,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:45,116 INFO L93 Difference]: Finished difference Result 202 states and 206 transitions. [2018-10-04 09:37:45,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 09:37:45,117 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 107 [2018-10-04 09:37:45,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:45,117 INFO L225 Difference]: With dead ends: 202 [2018-10-04 09:37:45,117 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 09:37:45,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 1.5s impTime 16 [2018-10-04 09:37:45,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 09:37:45,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-04 09:37:45,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 09:37:45,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2018-10-04 09:37:45,128 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 107 [2018-10-04 09:37:45,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:45,128 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2018-10-04 09:37:45,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 09:37:45,128 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2018-10-04 09:37:45,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 09:37:45,129 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:45,129 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 1, 1, 1, 1, 1] [2018-10-04 09:37:45,129 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:45,129 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:45,130 INFO L82 PathProgramCache]: Analyzing trace with hash 798222758, now seen corresponding path program 40 times [2018-10-04 09:37:45,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:45,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:45,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:45,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:45,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:45,516 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:37:45,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 271 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:45,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:45,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:37:45,591 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:37:45,636 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:37:45,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:45,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:45,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 271 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:45,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:45,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 09:37:45,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 09:37:45,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 09:37:45,835 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:45,835 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 24 states. [2018-10-04 09:37:45,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:45,947 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2018-10-04 09:37:45,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 09:37:45,948 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 108 [2018-10-04 09:37:45,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:45,949 INFO L225 Difference]: With dead ends: 125 [2018-10-04 09:37:45,949 INFO L226 Difference]: Without dead ends: 119 [2018-10-04 09:37:45,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 9 [2018-10-04 09:37:45,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-04 09:37:45,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-10-04 09:37:45,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 09:37:45,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-10-04 09:37:45,963 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 108 [2018-10-04 09:37:45,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:45,963 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-10-04 09:37:45,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 09:37:45,963 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-10-04 09:37:45,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 09:37:45,964 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:45,964 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 1, 1, 1, 1, 1] [2018-10-04 09:37:45,965 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:45,965 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:45,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1030199836, now seen corresponding path program 41 times [2018-10-04 09:37:45,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:45,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:45,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:45,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:45,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:46,680 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:37:47,021 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:37:47,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 924 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:47,275 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:47,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:37:47,284 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:37:47,372 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 09:37:47,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:47,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 924 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:47,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:47,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 09:37:47,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 09:37:47,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 09:37:47,735 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:47,735 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 46 states. [2018-10-04 09:37:48,245 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:37:48,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:48,750 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2018-10-04 09:37:48,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 09:37:48,750 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 112 [2018-10-04 09:37:48,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:48,751 INFO L225 Difference]: With dead ends: 211 [2018-10-04 09:37:48,751 INFO L226 Difference]: Without dead ends: 116 [2018-10-04 09:37:48,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.3s impTime 18 [2018-10-04 09:37:48,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-04 09:37:48,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-04 09:37:48,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-04 09:37:48,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2018-10-04 09:37:48,763 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 112 [2018-10-04 09:37:48,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:48,763 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2018-10-04 09:37:48,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 09:37:48,764 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2018-10-04 09:37:48,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-04 09:37:48,764 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:48,764 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 1, 1, 1, 1, 1] [2018-10-04 09:37:48,765 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:48,765 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:48,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1949005931, now seen corresponding path program 42 times [2018-10-04 09:37:48,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:48,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:48,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:48,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:48,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:49,111 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:37:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 295 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:49,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:49,188 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:37:49,196 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:37:49,301 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-04 09:37:49,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:49,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 295 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:49,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:49,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 09:37:49,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 09:37:49,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 09:37:49,524 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:49,524 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 25 states. [2018-10-04 09:37:49,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:49,648 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2018-10-04 09:37:49,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 09:37:49,648 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 113 [2018-10-04 09:37:49,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:49,649 INFO L225 Difference]: With dead ends: 130 [2018-10-04 09:37:49,650 INFO L226 Difference]: Without dead ends: 124 [2018-10-04 09:37:49,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.1s impTime 9 [2018-10-04 09:37:49,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-04 09:37:49,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2018-10-04 09:37:49,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-04 09:37:49,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2018-10-04 09:37:49,662 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 113 [2018-10-04 09:37:49,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:49,662 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2018-10-04 09:37:49,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 09:37:49,662 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2018-10-04 09:37:49,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-04 09:37:49,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:49,663 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1] [2018-10-04 09:37:49,663 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:49,663 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:49,663 INFO L82 PathProgramCache]: Analyzing trace with hash 725198987, now seen corresponding path program 43 times [2018-10-04 09:37:49,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:49,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:49,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:49,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:49,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:52,714 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:37:52,929 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:37:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 1012 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:53,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:53,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:37:53,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:37:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:53,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 1012 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:53,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:53,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 09:37:53,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 09:37:53,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 09:37:53,322 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:53,323 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 48 states. [2018-10-04 09:37:53,733 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:37:54,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:54,144 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2018-10-04 09:37:54,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 09:37:54,145 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 117 [2018-10-04 09:37:54,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:54,146 INFO L225 Difference]: With dead ends: 220 [2018-10-04 09:37:54,146 INFO L226 Difference]: Without dead ends: 121 [2018-10-04 09:37:54,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time 3.0s impTime 20 [2018-10-04 09:37:54,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-04 09:37:54,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-04 09:37:54,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-04 09:37:54,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-10-04 09:37:54,155 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 117 [2018-10-04 09:37:54,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:54,155 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-10-04 09:37:54,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 09:37:54,155 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-10-04 09:37:54,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-04 09:37:54,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:54,156 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2018-10-04 09:37:54,156 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:54,156 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:54,157 INFO L82 PathProgramCache]: Analyzing trace with hash 995311282, now seen corresponding path program 44 times [2018-10-04 09:37:54,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:54,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:54,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:54,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:37:54,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:55,964 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:37:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 320 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:56,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:56,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:37:56,059 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:37:56,111 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:37:56,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:56,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 320 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:56,442 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:56,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 09:37:56,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 09:37:56,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 09:37:56,443 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:56,443 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 26 states. [2018-10-04 09:37:56,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:56,570 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2018-10-04 09:37:56,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 09:37:56,571 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2018-10-04 09:37:56,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:56,572 INFO L225 Difference]: With dead ends: 135 [2018-10-04 09:37:56,572 INFO L226 Difference]: Without dead ends: 129 [2018-10-04 09:37:56,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.2s impTime 11 [2018-10-04 09:37:56,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-04 09:37:56,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2018-10-04 09:37:56,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-04 09:37:56,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2018-10-04 09:37:56,585 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 118 [2018-10-04 09:37:56,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:56,585 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2018-10-04 09:37:56,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 09:37:56,586 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2018-10-04 09:37:56,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-04 09:37:56,586 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:56,586 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 1, 1, 1, 1, 1] [2018-10-04 09:37:56,587 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:56,587 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:56,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1935656, now seen corresponding path program 45 times [2018-10-04 09:37:56,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:56,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:56,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:56,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:56,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:56,943 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:37:57,268 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:37:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 1104 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:57,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:57,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:37:57,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:37:57,656 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 09:37:57,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:57,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:37:57,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 1104 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:57,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:37:57,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 09:37:57,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 09:37:57,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 09:37:57,872 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:37:57,872 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 50 states. [2018-10-04 09:37:58,286 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:37:58,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:37:58,890 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2018-10-04 09:37:58,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 09:37:58,890 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 122 [2018-10-04 09:37:58,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:37:58,891 INFO L225 Difference]: With dead ends: 229 [2018-10-04 09:37:58,891 INFO L226 Difference]: Without dead ends: 126 [2018-10-04 09:37:58,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime 22 [2018-10-04 09:37:58,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-04 09:37:58,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-04 09:37:58,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-04 09:37:58,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2018-10-04 09:37:58,904 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 122 [2018-10-04 09:37:58,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:37:58,904 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2018-10-04 09:37:58,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 09:37:58,904 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2018-10-04 09:37:58,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-04 09:37:58,905 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:37:58,905 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 1, 1, 1, 1, 1] [2018-10-04 09:37:58,905 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:37:58,905 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:37:58,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1360966497, now seen corresponding path program 46 times [2018-10-04 09:37:58,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:37:58,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:37:58,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:58,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:37:58,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:37:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:37:59,827 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:37:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 346 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:37:59,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:37:59,925 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:37:59,933 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:37:59,988 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:37:59,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:37:59,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 346 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:00,213 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:00,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 09:38:00,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 09:38:00,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 09:38:00,213 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:00,214 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 27 states. [2018-10-04 09:38:00,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:00,344 INFO L93 Difference]: Finished difference Result 140 states and 143 transitions. [2018-10-04 09:38:00,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 09:38:00,345 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 123 [2018-10-04 09:38:00,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:00,346 INFO L225 Difference]: With dead ends: 140 [2018-10-04 09:38:00,346 INFO L226 Difference]: Without dead ends: 134 [2018-10-04 09:38:00,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.6s impTime 12 [2018-10-04 09:38:00,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-04 09:38:00,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2018-10-04 09:38:00,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-04 09:38:00,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-10-04 09:38:00,357 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 123 [2018-10-04 09:38:00,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:00,357 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-10-04 09:38:00,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 09:38:00,357 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-10-04 09:38:00,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-04 09:38:00,358 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:00,358 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 1, 1, 1, 1, 1] [2018-10-04 09:38:00,358 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:00,358 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:00,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1531900329, now seen corresponding path program 47 times [2018-10-04 09:38:00,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:00,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:00,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:00,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:38:00,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:00,697 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:01,132 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:38:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 1200 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:01,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:01,341 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:01,350 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:38:01,429 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 09:38:01,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:38:01,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 1200 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:01,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:01,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 09:38:01,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 09:38:01,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 09:38:01,646 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:01,646 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 52 states. [2018-10-04 09:38:02,025 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:38:03,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:03,100 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2018-10-04 09:38:03,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 09:38:03,100 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 127 [2018-10-04 09:38:03,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:03,101 INFO L225 Difference]: With dead ends: 238 [2018-10-04 09:38:03,101 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 09:38:03,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime 25 [2018-10-04 09:38:03,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 09:38:03,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-04 09:38:03,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-04 09:38:03,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-10-04 09:38:03,113 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 127 [2018-10-04 09:38:03,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:03,113 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-10-04 09:38:03,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 09:38:03,114 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-10-04 09:38:03,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 09:38:03,114 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:03,114 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 1, 1, 1, 1, 1] [2018-10-04 09:38:03,115 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:03,115 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:03,115 INFO L82 PathProgramCache]: Analyzing trace with hash -652320834, now seen corresponding path program 48 times [2018-10-04 09:38:03,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:03,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:03,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:03,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:38:03,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:03,347 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 373 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:03,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:03,442 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:03,450 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:38:03,527 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 09:38:03,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:38:03,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 373 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:03,819 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:03,819 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 09:38:03,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 09:38:03,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 09:38:03,820 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:03,820 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 28 states. [2018-10-04 09:38:03,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:03,961 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2018-10-04 09:38:03,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 09:38:03,962 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 128 [2018-10-04 09:38:03,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:03,963 INFO L225 Difference]: With dead ends: 145 [2018-10-04 09:38:03,963 INFO L226 Difference]: Without dead ends: 139 [2018-10-04 09:38:03,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.1s impTime 13 [2018-10-04 09:38:03,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-04 09:38:03,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-10-04 09:38:03,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-04 09:38:03,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2018-10-04 09:38:03,974 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 128 [2018-10-04 09:38:03,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:03,974 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2018-10-04 09:38:03,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 09:38:03,974 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2018-10-04 09:38:03,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-04 09:38:03,975 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:03,975 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 1, 1, 1, 1, 1] [2018-10-04 09:38:03,975 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:03,975 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:03,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1843837900, now seen corresponding path program 49 times [2018-10-04 09:38:03,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:03,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:03,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:03,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:38:03,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:04,901 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:05,135 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:38:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1300 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:05,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:05,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:05,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:38:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:05,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1300 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:06,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:06,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 09:38:06,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 09:38:06,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 09:38:06,543 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:06,543 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 54 states. [2018-10-04 09:38:06,703 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:38:07,177 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:38:07,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:07,198 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2018-10-04 09:38:07,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 09:38:07,198 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 132 [2018-10-04 09:38:07,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:07,199 INFO L225 Difference]: With dead ends: 247 [2018-10-04 09:38:07,199 INFO L226 Difference]: Without dead ends: 136 [2018-10-04 09:38:07,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 1.1s impTime 9 [2018-10-04 09:38:07,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-04 09:38:07,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-10-04 09:38:07,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-04 09:38:07,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-10-04 09:38:07,210 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 132 [2018-10-04 09:38:07,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:07,210 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-10-04 09:38:07,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 09:38:07,210 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-10-04 09:38:07,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-04 09:38:07,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:07,211 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 1, 1, 1, 1, 1] [2018-10-04 09:38:07,211 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:07,212 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:07,212 INFO L82 PathProgramCache]: Analyzing trace with hash 35240749, now seen corresponding path program 50 times [2018-10-04 09:38:07,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:07,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:07,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:07,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:38:07,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:07,827 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 401 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:07,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:07,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:07,991 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:38:08,053 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:38:08,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:38:08,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 401 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:08,551 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:08,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 09:38:08,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 09:38:08,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 09:38:08,552 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:08,552 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 29 states. [2018-10-04 09:38:08,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:08,700 INFO L93 Difference]: Finished difference Result 150 states and 153 transitions. [2018-10-04 09:38:08,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 09:38:08,700 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 133 [2018-10-04 09:38:08,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:08,701 INFO L225 Difference]: With dead ends: 150 [2018-10-04 09:38:08,701 INFO L226 Difference]: Without dead ends: 144 [2018-10-04 09:38:08,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.4s impTime 14 [2018-10-04 09:38:08,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-04 09:38:08,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2018-10-04 09:38:08,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-04 09:38:08,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2018-10-04 09:38:08,717 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 133 [2018-10-04 09:38:08,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:08,717 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2018-10-04 09:38:08,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 09:38:08,717 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2018-10-04 09:38:08,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-04 09:38:08,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:08,718 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 1, 1, 1, 1, 1] [2018-10-04 09:38:08,718 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:08,718 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:08,719 INFO L82 PathProgramCache]: Analyzing trace with hash -838119389, now seen corresponding path program 51 times [2018-10-04 09:38:08,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:08,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:08,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:08,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:38:08,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:08,994 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:09,444 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:38:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 1404 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:09,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:09,682 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:09,689 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:38:09,780 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 09:38:09,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:38:09,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 1404 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:10,034 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:10,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 09:38:10,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 09:38:10,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 09:38:10,035 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:10,035 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 56 states. [2018-10-04 09:38:10,345 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:38:11,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:11,469 INFO L93 Difference]: Finished difference Result 256 states and 260 transitions. [2018-10-04 09:38:11,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 09:38:11,469 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 137 [2018-10-04 09:38:11,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:11,470 INFO L225 Difference]: With dead ends: 256 [2018-10-04 09:38:11,470 INFO L226 Difference]: Without dead ends: 141 [2018-10-04 09:38:11,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime 25 [2018-10-04 09:38:11,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-04 09:38:11,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-04 09:38:11,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-04 09:38:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2018-10-04 09:38:11,481 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 137 [2018-10-04 09:38:11,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:11,482 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2018-10-04 09:38:11,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 09:38:11,482 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2018-10-04 09:38:11,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-04 09:38:11,482 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:11,483 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 1, 1, 1, 1, 1] [2018-10-04 09:38:11,483 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:11,483 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:11,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1657490634, now seen corresponding path program 52 times [2018-10-04 09:38:11,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:11,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:11,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:11,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:38:11,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:11,722 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 430 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:11,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:11,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:11,860 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:38:11,918 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:38:11,918 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:38:11,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 430 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:12,341 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:12,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 09:38:12,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 09:38:12,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 09:38:12,341 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:12,341 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 30 states. [2018-10-04 09:38:12,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:12,491 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2018-10-04 09:38:12,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 09:38:12,492 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 138 [2018-10-04 09:38:12,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:12,493 INFO L225 Difference]: With dead ends: 155 [2018-10-04 09:38:12,493 INFO L226 Difference]: Without dead ends: 149 [2018-10-04 09:38:12,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.1s impTime 15 [2018-10-04 09:38:12,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-04 09:38:12,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2018-10-04 09:38:12,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-04 09:38:12,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-10-04 09:38:12,504 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 138 [2018-10-04 09:38:12,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:12,504 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-10-04 09:38:12,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 09:38:12,505 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-10-04 09:38:12,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-04 09:38:12,505 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:12,505 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 1, 1, 1, 1, 1] [2018-10-04 09:38:12,505 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:12,505 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:12,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1915800384, now seen corresponding path program 53 times [2018-10-04 09:38:12,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:12,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:12,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:12,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:38:12,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:12,777 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:13,474 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:38:13,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 1512 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:13,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:13,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:13,764 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:38:13,849 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 09:38:13,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:38:13,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:14,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 1512 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:14,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:14,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 09:38:14,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 09:38:14,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 09:38:14,205 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:14,205 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 58 states. [2018-10-04 09:38:14,549 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:38:15,586 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:38:15,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:15,802 INFO L93 Difference]: Finished difference Result 265 states and 269 transitions. [2018-10-04 09:38:15,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 09:38:15,802 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 142 [2018-10-04 09:38:15,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:15,803 INFO L225 Difference]: With dead ends: 265 [2018-10-04 09:38:15,803 INFO L226 Difference]: Without dead ends: 146 [2018-10-04 09:38:15,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.5s impTime 12 [2018-10-04 09:38:15,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-04 09:38:15,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-10-04 09:38:15,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-04 09:38:15,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2018-10-04 09:38:15,817 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 142 [2018-10-04 09:38:15,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:15,817 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2018-10-04 09:38:15,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 09:38:15,817 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2018-10-04 09:38:15,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-04 09:38:15,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:15,818 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 1, 1, 1, 1, 1] [2018-10-04 09:38:15,818 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:15,818 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:15,818 INFO L82 PathProgramCache]: Analyzing trace with hash 520593145, now seen corresponding path program 54 times [2018-10-04 09:38:15,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:15,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:15,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:15,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:38:15,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:15,989 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:16,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 460 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:16,133 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:16,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:16,141 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:38:16,234 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-04 09:38:16,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:38:16,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 460 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:16,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:16,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 09:38:16,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 09:38:16,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 09:38:16,602 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:16,602 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 31 states. [2018-10-04 09:38:16,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:16,757 INFO L93 Difference]: Finished difference Result 160 states and 163 transitions. [2018-10-04 09:38:16,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 09:38:16,758 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 143 [2018-10-04 09:38:16,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:16,759 INFO L225 Difference]: With dead ends: 160 [2018-10-04 09:38:16,759 INFO L226 Difference]: Without dead ends: 154 [2018-10-04 09:38:16,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.1s impTime 16 [2018-10-04 09:38:16,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-04 09:38:16,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2018-10-04 09:38:16,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-04 09:38:16,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2018-10-04 09:38:16,771 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 143 [2018-10-04 09:38:16,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:16,771 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2018-10-04 09:38:16,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 09:38:16,771 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2018-10-04 09:38:16,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-04 09:38:16,771 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:16,771 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 1, 1, 1, 1, 1] [2018-10-04 09:38:16,772 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:16,772 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:16,772 INFO L82 PathProgramCache]: Analyzing trace with hash 915041775, now seen corresponding path program 55 times [2018-10-04 09:38:16,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:16,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:16,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:16,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:38:16,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:17,042 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:17,599 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:38:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1624 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:18,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:18,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:18,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:38:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:18,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1624 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:18,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:18,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-04 09:38:18,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 09:38:18,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 09:38:18,823 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:18,823 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 60 states. [2018-10-04 09:38:19,112 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:38:20,218 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:38:20,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:20,578 INFO L93 Difference]: Finished difference Result 274 states and 278 transitions. [2018-10-04 09:38:20,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 09:38:20,579 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 147 [2018-10-04 09:38:20,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:20,580 INFO L225 Difference]: With dead ends: 274 [2018-10-04 09:38:20,580 INFO L226 Difference]: Without dead ends: 151 [2018-10-04 09:38:20,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.5s impTime 14 [2018-10-04 09:38:20,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-04 09:38:20,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-04 09:38:20,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-04 09:38:20,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-10-04 09:38:20,597 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 147 [2018-10-04 09:38:20,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:20,598 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-10-04 09:38:20,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 09:38:20,598 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-10-04 09:38:20,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-04 09:38:20,599 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:20,599 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 1, 1, 1, 1, 1] [2018-10-04 09:38:20,599 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:20,599 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:20,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1773143510, now seen corresponding path program 56 times [2018-10-04 09:38:20,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:20,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:20,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:20,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:38:20,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:20,800 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 491 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:20,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:20,913 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:20,920 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:38:20,985 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:38:20,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:38:20,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 491 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:21,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:21,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 09:38:21,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 09:38:21,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 09:38:21,237 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:21,238 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 32 states. [2018-10-04 09:38:21,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:21,435 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2018-10-04 09:38:21,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 09:38:21,435 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 148 [2018-10-04 09:38:21,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:21,436 INFO L225 Difference]: With dead ends: 165 [2018-10-04 09:38:21,436 INFO L226 Difference]: Without dead ends: 159 [2018-10-04 09:38:21,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 17 [2018-10-04 09:38:21,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-04 09:38:21,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-10-04 09:38:21,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-04 09:38:21,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-10-04 09:38:21,450 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 148 [2018-10-04 09:38:21,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:21,450 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-10-04 09:38:21,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 09:38:21,450 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-10-04 09:38:21,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-04 09:38:21,450 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:21,451 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 1, 1, 1, 1, 1] [2018-10-04 09:38:21,451 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:21,451 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:21,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1766187444, now seen corresponding path program 57 times [2018-10-04 09:38:21,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:21,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:21,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:21,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:38:21,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:21,670 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:22,245 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:38:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 1740 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:22,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:22,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:22,534 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:38:22,635 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-04 09:38:22,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:38:22,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:22,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 1740 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:22,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:22,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 09:38:22,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 09:38:22,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 09:38:22,903 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:22,904 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 62 states. [2018-10-04 09:38:23,297 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:38:24,526 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:38:24,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:24,992 INFO L93 Difference]: Finished difference Result 283 states and 287 transitions. [2018-10-04 09:38:24,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 09:38:24,992 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 152 [2018-10-04 09:38:24,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:24,993 INFO L225 Difference]: With dead ends: 283 [2018-10-04 09:38:24,993 INFO L226 Difference]: Without dead ends: 156 [2018-10-04 09:38:24,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.4s impTime 16 [2018-10-04 09:38:24,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-04 09:38:25,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-04 09:38:25,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-04 09:38:25,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2018-10-04 09:38:25,007 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 152 [2018-10-04 09:38:25,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:25,007 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2018-10-04 09:38:25,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 09:38:25,007 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2018-10-04 09:38:25,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-04 09:38:25,007 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:25,008 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 1, 1, 1, 1, 1] [2018-10-04 09:38:25,008 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:25,008 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:25,008 INFO L82 PathProgramCache]: Analyzing trace with hash -928358715, now seen corresponding path program 58 times [2018-10-04 09:38:25,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:25,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:25,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:25,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:38:25,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:25,202 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 523 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:25,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:25,340 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:25,349 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:38:25,420 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:38:25,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:38:25,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 523 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:25,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:25,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 09:38:25,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 09:38:25,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 09:38:25,753 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:25,754 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand 33 states. [2018-10-04 09:38:26,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:26,002 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2018-10-04 09:38:26,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 09:38:26,002 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 153 [2018-10-04 09:38:26,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:26,003 INFO L225 Difference]: With dead ends: 170 [2018-10-04 09:38:26,003 INFO L226 Difference]: Without dead ends: 164 [2018-10-04 09:38:26,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.1s impTime 18 [2018-10-04 09:38:26,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-04 09:38:26,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2018-10-04 09:38:26,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-04 09:38:26,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2018-10-04 09:38:26,022 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 153 [2018-10-04 09:38:26,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:26,022 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2018-10-04 09:38:26,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 09:38:26,023 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2018-10-04 09:38:26,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-04 09:38:26,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:26,023 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 1, 1, 1, 1, 1] [2018-10-04 09:38:26,024 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:26,024 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:26,024 INFO L82 PathProgramCache]: Analyzing trace with hash -839882821, now seen corresponding path program 59 times [2018-10-04 09:38:26,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:26,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:26,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:26,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:38:26,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:26,222 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:26,635 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:38:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 1860 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:26,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:26,911 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:26,918 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:38:27,013 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-04 09:38:27,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:38:27,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 1860 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:27,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:27,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 09:38:27,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 09:38:27,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 09:38:27,277 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:27,277 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 64 states. [2018-10-04 09:38:27,546 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:38:28,491 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:38:28,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:28,812 INFO L93 Difference]: Finished difference Result 292 states and 296 transitions. [2018-10-04 09:38:28,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 09:38:28,812 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 157 [2018-10-04 09:38:28,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:28,813 INFO L225 Difference]: With dead ends: 292 [2018-10-04 09:38:28,813 INFO L226 Difference]: Without dead ends: 161 [2018-10-04 09:38:28,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime 16 [2018-10-04 09:38:28,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-04 09:38:28,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-04 09:38:28,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-04 09:38:28,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-10-04 09:38:28,832 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 157 [2018-10-04 09:38:28,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:28,832 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-10-04 09:38:28,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 09:38:28,833 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-10-04 09:38:28,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-04 09:38:28,833 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:28,834 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 1, 1, 1, 1, 1] [2018-10-04 09:38:28,834 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:28,834 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:28,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1453492962, now seen corresponding path program 60 times [2018-10-04 09:38:28,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:28,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:28,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:28,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:38:28,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:29,022 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 556 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:29,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:29,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:29,250 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:38:29,392 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 09:38:29,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:38:29,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 556 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:29,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:29,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 09:38:29,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 09:38:29,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 09:38:29,663 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:29,663 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 34 states. [2018-10-04 09:38:29,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:29,842 INFO L93 Difference]: Finished difference Result 175 states and 178 transitions. [2018-10-04 09:38:29,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 09:38:29,843 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 158 [2018-10-04 09:38:29,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:29,844 INFO L225 Difference]: With dead ends: 175 [2018-10-04 09:38:29,844 INFO L226 Difference]: Without dead ends: 169 [2018-10-04 09:38:29,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 19 [2018-10-04 09:38:29,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-04 09:38:29,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2018-10-04 09:38:29,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-04 09:38:29,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2018-10-04 09:38:29,863 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 158 [2018-10-04 09:38:29,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:29,863 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2018-10-04 09:38:29,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 09:38:29,864 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2018-10-04 09:38:29,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-04 09:38:29,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:29,865 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 1, 1, 1, 1, 1] [2018-10-04 09:38:29,865 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:29,865 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:29,865 INFO L82 PathProgramCache]: Analyzing trace with hash 227229016, now seen corresponding path program 61 times [2018-10-04 09:38:29,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:29,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:29,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:29,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:38:29,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:30,070 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:30,624 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:38:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 1984 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:30,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:30,989 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:30,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:38:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:31,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:31,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 1984 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:31,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:31,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-04 09:38:31,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 09:38:31,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 09:38:31,348 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:31,348 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand 66 states. [2018-10-04 09:38:31,559 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:38:32,533 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:38:33,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:33,122 INFO L93 Difference]: Finished difference Result 301 states and 305 transitions. [2018-10-04 09:38:33,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 09:38:33,123 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 162 [2018-10-04 09:38:33,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:33,124 INFO L225 Difference]: With dead ends: 301 [2018-10-04 09:38:33,124 INFO L226 Difference]: Without dead ends: 166 [2018-10-04 09:38:33,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.4s impTime 19 [2018-10-04 09:38:33,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-04 09:38:33,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-10-04 09:38:33,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-04 09:38:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2018-10-04 09:38:33,143 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 162 [2018-10-04 09:38:33,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:33,144 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2018-10-04 09:38:33,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 09:38:33,144 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2018-10-04 09:38:33,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-04 09:38:33,145 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:33,145 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 1, 1, 1, 1, 1] [2018-10-04 09:38:33,145 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:33,145 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:33,145 INFO L82 PathProgramCache]: Analyzing trace with hash 541325969, now seen corresponding path program 62 times [2018-10-04 09:38:33,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:33,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:33,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:33,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:38:33,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:33,475 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 590 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:33,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:33,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:33,730 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:38:33,812 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:38:33,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:38:33,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 590 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:34,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:34,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 09:38:34,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 09:38:34,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 09:38:34,151 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:34,151 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 35 states. [2018-10-04 09:38:34,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:34,385 INFO L93 Difference]: Finished difference Result 180 states and 183 transitions. [2018-10-04 09:38:34,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 09:38:34,386 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 163 [2018-10-04 09:38:34,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:34,387 INFO L225 Difference]: With dead ends: 180 [2018-10-04 09:38:34,387 INFO L226 Difference]: Without dead ends: 174 [2018-10-04 09:38:34,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.3s impTime 20 [2018-10-04 09:38:34,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-04 09:38:34,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2018-10-04 09:38:34,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-10-04 09:38:34,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2018-10-04 09:38:34,403 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 163 [2018-10-04 09:38:34,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:34,404 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2018-10-04 09:38:34,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 09:38:34,404 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2018-10-04 09:38:34,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-04 09:38:34,404 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:34,405 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 1, 1, 1, 1, 1] [2018-10-04 09:38:34,405 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:34,405 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:34,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1149189511, now seen corresponding path program 63 times [2018-10-04 09:38:34,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:34,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:34,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:34,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:38:34,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:34,662 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:35,062 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:38:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 2112 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:35,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:35,282 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:35,290 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:38:35,405 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-04 09:38:35,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:38:35,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 2112 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:35,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:35,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 09:38:35,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 09:38:35,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 09:38:35,698 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:35,698 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand 68 states. [2018-10-04 09:38:35,840 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:38:36,267 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:38:36,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:36,538 INFO L93 Difference]: Finished difference Result 310 states and 314 transitions. [2018-10-04 09:38:36,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 09:38:36,538 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 167 [2018-10-04 09:38:36,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:36,539 INFO L225 Difference]: With dead ends: 310 [2018-10-04 09:38:36,539 INFO L226 Difference]: Without dead ends: 171 [2018-10-04 09:38:36,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime 19 [2018-10-04 09:38:36,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-04 09:38:36,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-04 09:38:36,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-04 09:38:36,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-10-04 09:38:36,554 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 167 [2018-10-04 09:38:36,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:36,554 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-10-04 09:38:36,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 09:38:36,554 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-10-04 09:38:36,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-04 09:38:36,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:36,555 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 1, 1, 1, 1, 1] [2018-10-04 09:38:36,555 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:36,555 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:36,555 INFO L82 PathProgramCache]: Analyzing trace with hash 167304174, now seen corresponding path program 64 times [2018-10-04 09:38:36,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:36,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:36,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:36,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:38:36,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:36,858 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 625 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:37,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:37,114 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:37,123 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:38:37,203 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:38:37,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:38:37,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 625 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:37,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:37,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 09:38:37,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 09:38:37,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 09:38:37,576 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:37,576 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 36 states. [2018-10-04 09:38:37,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:37,797 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2018-10-04 09:38:37,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 09:38:37,797 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 168 [2018-10-04 09:38:37,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:37,799 INFO L225 Difference]: With dead ends: 185 [2018-10-04 09:38:37,799 INFO L226 Difference]: Without dead ends: 179 [2018-10-04 09:38:37,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.3s impTime 20 [2018-10-04 09:38:37,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-04 09:38:37,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-10-04 09:38:37,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-04 09:38:37,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-10-04 09:38:37,819 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 168 [2018-10-04 09:38:37,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:37,819 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-10-04 09:38:37,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 09:38:37,820 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-10-04 09:38:37,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-04 09:38:37,820 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:37,821 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 1, 1, 1, 1, 1] [2018-10-04 09:38:37,821 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:37,821 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:37,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1678104476, now seen corresponding path program 65 times [2018-10-04 09:38:37,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:37,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:37,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:37,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:38:37,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:38,101 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:38,750 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:38:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 2244 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:39,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:39,228 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:39,235 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:38:39,343 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-04 09:38:39,343 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:38:39,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 2244 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:39,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:39,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 09:38:39,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 09:38:39,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 09:38:39,871 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:39,871 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 70 states. [2018-10-04 09:38:40,112 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:38:41,274 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:38:42,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:42,216 INFO L93 Difference]: Finished difference Result 319 states and 323 transitions. [2018-10-04 09:38:42,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 09:38:42,216 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 172 [2018-10-04 09:38:42,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:42,217 INFO L225 Difference]: With dead ends: 319 [2018-10-04 09:38:42,217 INFO L226 Difference]: Without dead ends: 176 [2018-10-04 09:38:42,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 1.8s impTime 21 [2018-10-04 09:38:42,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-04 09:38:42,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-10-04 09:38:42,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-04 09:38:42,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2018-10-04 09:38:42,237 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 172 [2018-10-04 09:38:42,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:42,238 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2018-10-04 09:38:42,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 09:38:42,238 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2018-10-04 09:38:42,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-04 09:38:42,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:42,239 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 1, 1, 1, 1, 1] [2018-10-04 09:38:42,239 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:42,239 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:42,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1483312547, now seen corresponding path program 66 times [2018-10-04 09:38:42,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:42,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:42,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:42,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:38:42,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:42,391 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:42,609 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:38:42,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 661 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:42,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:42,673 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:42,680 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:38:42,790 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-04 09:38:42,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:38:42,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:43,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 661 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:43,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:43,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 09:38:43,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 09:38:43,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 09:38:43,080 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:43,080 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 37 states. [2018-10-04 09:38:43,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:43,277 INFO L93 Difference]: Finished difference Result 190 states and 193 transitions. [2018-10-04 09:38:43,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 09:38:43,278 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 173 [2018-10-04 09:38:43,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:43,278 INFO L225 Difference]: With dead ends: 190 [2018-10-04 09:38:43,278 INFO L226 Difference]: Without dead ends: 184 [2018-10-04 09:38:43,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 7 [2018-10-04 09:38:43,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-10-04 09:38:43,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2018-10-04 09:38:43,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-10-04 09:38:43,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 182 transitions. [2018-10-04 09:38:43,294 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 182 transitions. Word has length 173 [2018-10-04 09:38:43,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:43,294 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 182 transitions. [2018-10-04 09:38:43,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 09:38:43,294 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 182 transitions. [2018-10-04 09:38:43,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-04 09:38:43,295 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:43,295 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 1, 1, 1, 1, 1] [2018-10-04 09:38:43,296 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:43,296 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:43,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1794699091, now seen corresponding path program 67 times [2018-10-04 09:38:43,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:43,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:43,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:43,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:38:43,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:43,715 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:44,136 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:38:44,488 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:38:44,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 2380 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:44,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:44,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:44,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:38:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:45,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:45,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 2380 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:45,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:45,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-04 09:38:45,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 09:38:45,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 09:38:45,329 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:45,329 INFO L87 Difference]: Start difference. First operand 180 states and 182 transitions. Second operand 72 states. [2018-10-04 09:38:45,456 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:38:46,746 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:38:47,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:47,838 INFO L93 Difference]: Finished difference Result 328 states and 332 transitions. [2018-10-04 09:38:47,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 09:38:47,838 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 177 [2018-10-04 09:38:47,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:47,839 INFO L225 Difference]: With dead ends: 328 [2018-10-04 09:38:47,839 INFO L226 Difference]: Without dead ends: 181 [2018-10-04 09:38:47,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.1s impTime 24 [2018-10-04 09:38:47,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-04 09:38:47,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-04 09:38:47,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-04 09:38:47,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-10-04 09:38:47,856 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 177 [2018-10-04 09:38:47,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:47,856 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-10-04 09:38:47,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 09:38:47,856 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-10-04 09:38:47,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-04 09:38:47,856 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:47,857 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 1, 1, 1, 1, 1] [2018-10-04 09:38:47,857 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:47,857 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:47,857 INFO L82 PathProgramCache]: Analyzing trace with hash 2072574202, now seen corresponding path program 68 times [2018-10-04 09:38:47,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:47,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:47,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:47,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:38:47,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:48,089 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:48,266 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:38:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 698 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:48,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:48,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:48,355 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:38:48,433 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:38:48,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:38:48,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 698 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:48,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:48,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 09:38:48,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 09:38:48,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 09:38:48,989 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:48,989 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 38 states. [2018-10-04 09:38:49,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:49,190 INFO L93 Difference]: Finished difference Result 195 states and 198 transitions. [2018-10-04 09:38:49,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 09:38:49,190 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 178 [2018-10-04 09:38:49,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:49,191 INFO L225 Difference]: With dead ends: 195 [2018-10-04 09:38:49,191 INFO L226 Difference]: Without dead ends: 189 [2018-10-04 09:38:49,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.2s impTime 8 [2018-10-04 09:38:49,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-04 09:38:49,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2018-10-04 09:38:49,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-04 09:38:49,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-10-04 09:38:49,206 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 178 [2018-10-04 09:38:49,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:49,206 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-10-04 09:38:49,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 09:38:49,206 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-10-04 09:38:49,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-04 09:38:49,207 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:49,207 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 1, 1, 1, 1, 1] [2018-10-04 09:38:49,207 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:49,207 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:49,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1591533424, now seen corresponding path program 69 times [2018-10-04 09:38:49,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:49,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:49,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:49,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:38:49,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:49,510 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:49,901 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:38:50,308 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:38:50,903 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:38:50,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 2520 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:50,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:50,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:50,935 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:38:51,098 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-04 09:38:51,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:38:51,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 2520 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:51,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:51,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-04 09:38:51,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 09:38:51,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 09:38:51,464 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:51,464 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 74 states. [2018-10-04 09:38:52,786 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:38:54,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:54,350 INFO L93 Difference]: Finished difference Result 337 states and 341 transitions. [2018-10-04 09:38:54,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 09:38:54,350 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 182 [2018-10-04 09:38:54,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:54,351 INFO L225 Difference]: With dead ends: 337 [2018-10-04 09:38:54,351 INFO L226 Difference]: Without dead ends: 186 [2018-10-04 09:38:54,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.3s impTime 25 [2018-10-04 09:38:54,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-04 09:38:54,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-10-04 09:38:54,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-10-04 09:38:54,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2018-10-04 09:38:54,368 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 182 [2018-10-04 09:38:54,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:54,368 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2018-10-04 09:38:54,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 09:38:54,368 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2018-10-04 09:38:54,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-04 09:38:54,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:54,369 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 1, 1, 1, 1, 1] [2018-10-04 09:38:54,369 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:54,369 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:54,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1595685335, now seen corresponding path program 70 times [2018-10-04 09:38:54,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:54,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:54,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:54,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:38:54,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:54,521 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:54,643 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:38:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 736 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:54,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:54,719 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:54,728 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:38:54,814 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:38:54,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:38:54,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 736 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:55,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:55,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 09:38:55,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 09:38:55,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 09:38:55,156 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:55,156 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand 39 states. [2018-10-04 09:38:55,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:55,390 INFO L93 Difference]: Finished difference Result 200 states and 203 transitions. [2018-10-04 09:38:55,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 09:38:55,391 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 183 [2018-10-04 09:38:55,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:55,392 INFO L225 Difference]: With dead ends: 200 [2018-10-04 09:38:55,392 INFO L226 Difference]: Without dead ends: 194 [2018-10-04 09:38:55,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.1s impTime 7 [2018-10-04 09:38:55,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-04 09:38:55,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 190. [2018-10-04 09:38:55,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-10-04 09:38:55,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2018-10-04 09:38:55,409 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 183 [2018-10-04 09:38:55,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:55,409 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2018-10-04 09:38:55,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 09:38:55,409 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2018-10-04 09:38:55,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-10-04 09:38:55,410 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:55,410 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 1, 1, 1, 1, 1] [2018-10-04 09:38:55,410 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:55,410 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:55,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1835041505, now seen corresponding path program 71 times [2018-10-04 09:38:55,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:55,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:55,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:55,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:38:55,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:55,720 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:55,955 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:38:56,223 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:38:56,529 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:38:56,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 2664 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:56,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:56,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:56,590 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:38:56,708 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-04 09:38:56,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:38:56,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 2664 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:57,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:57,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-04 09:38:57,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 09:38:57,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 09:38:57,014 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:57,014 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 76 states. [2018-10-04 09:38:57,883 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:38:58,793 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 9 [2018-10-04 09:38:58,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:38:58,902 INFO L93 Difference]: Finished difference Result 346 states and 350 transitions. [2018-10-04 09:38:58,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 09:38:58,902 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 187 [2018-10-04 09:38:58,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:38:58,903 INFO L225 Difference]: With dead ends: 346 [2018-10-04 09:38:58,903 INFO L226 Difference]: Without dead ends: 191 [2018-10-04 09:38:58,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.3s impTime 10 [2018-10-04 09:38:58,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-04 09:38:58,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-04 09:38:58,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-04 09:38:58,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-10-04 09:38:58,926 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 187 [2018-10-04 09:38:58,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:38:58,926 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-10-04 09:38:58,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 09:38:58,927 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-10-04 09:38:58,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-04 09:38:58,927 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:38:58,928 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 1, 1, 1, 1, 1] [2018-10-04 09:38:58,928 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:38:58,928 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:38:58,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1521017350, now seen corresponding path program 72 times [2018-10-04 09:38:58,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:38:58,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:38:58,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:58,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:38:58,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:38:58,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:38:59,146 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:38:59,296 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:38:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 775 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:59,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:38:59,383 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:38:59,390 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:38:59,513 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 09:38:59,513 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:38:59,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:38:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 775 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:38:59,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:38:59,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 09:38:59,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 09:38:59,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 09:38:59,853 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:38:59,853 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 40 states. [2018-10-04 09:39:00,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:39:00,082 INFO L93 Difference]: Finished difference Result 205 states and 208 transitions. [2018-10-04 09:39:00,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 09:39:00,082 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 188 [2018-10-04 09:39:00,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:39:00,084 INFO L225 Difference]: With dead ends: 205 [2018-10-04 09:39:00,084 INFO L226 Difference]: Without dead ends: 199 [2018-10-04 09:39:00,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.2s impTime 8 [2018-10-04 09:39:00,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-04 09:39:00,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2018-10-04 09:39:00,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-04 09:39:00,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2018-10-04 09:39:00,107 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 188 [2018-10-04 09:39:00,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:39:00,108 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2018-10-04 09:39:00,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 09:39:00,108 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2018-10-04 09:39:00,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-04 09:39:00,109 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:39:00,109 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 1, 1, 1, 1, 1] [2018-10-04 09:39:00,109 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:39:00,109 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:39:00,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1787388540, now seen corresponding path program 73 times [2018-10-04 09:39:00,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:39:00,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:39:00,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:00,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:39:00,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:00,400 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:39:00,632 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:39:00,938 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:39:01,304 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:39:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 2812 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:01,367 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:39:01,367 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:39:01,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:39:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:01,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:39:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 2812 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:01,769 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:39:01,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-04 09:39:01,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 09:39:01,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 09:39:01,770 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:39:01,770 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand 78 states. [2018-10-04 09:39:02,513 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:39:03,418 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 9 [2018-10-04 09:39:03,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:39:03,548 INFO L93 Difference]: Finished difference Result 355 states and 359 transitions. [2018-10-04 09:39:03,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 09:39:03,548 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 192 [2018-10-04 09:39:03,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:39:03,549 INFO L225 Difference]: With dead ends: 355 [2018-10-04 09:39:03,549 INFO L226 Difference]: Without dead ends: 196 [2018-10-04 09:39:03,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.3s impTime 12 [2018-10-04 09:39:03,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-10-04 09:39:03,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-10-04 09:39:03,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-04 09:39:03,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2018-10-04 09:39:03,571 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 192 [2018-10-04 09:39:03,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:39:03,571 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2018-10-04 09:39:03,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 09:39:03,571 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2018-10-04 09:39:03,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-10-04 09:39:03,572 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:39:03,572 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 1, 1, 1, 1, 1] [2018-10-04 09:39:03,573 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:39:03,573 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:39:03,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1861088757, now seen corresponding path program 74 times [2018-10-04 09:39:03,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:39:03,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:39:03,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:03,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:39:03,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:03,724 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:39:03,917 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:39:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 815 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:04,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:39:04,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:39:04,177 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:39:04,265 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:39:04,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:39:04,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:39:04,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 815 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:04,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:39:04,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 09:39:04,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 09:39:04,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 09:39:04,588 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:39:04,589 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 41 states. [2018-10-04 09:39:04,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:39:04,838 INFO L93 Difference]: Finished difference Result 210 states and 213 transitions. [2018-10-04 09:39:04,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 09:39:04,839 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 193 [2018-10-04 09:39:04,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:39:04,840 INFO L225 Difference]: With dead ends: 210 [2018-10-04 09:39:04,840 INFO L226 Difference]: Without dead ends: 204 [2018-10-04 09:39:04,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.2s impTime 9 [2018-10-04 09:39:04,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-04 09:39:04,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2018-10-04 09:39:04,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-10-04 09:39:04,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2018-10-04 09:39:04,859 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 193 [2018-10-04 09:39:04,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:39:04,859 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2018-10-04 09:39:04,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 09:39:04,859 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2018-10-04 09:39:04,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-04 09:39:04,860 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:39:04,860 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 1, 1, 1, 1, 1] [2018-10-04 09:39:04,860 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:39:04,860 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:39:04,861 INFO L82 PathProgramCache]: Analyzing trace with hash -315300117, now seen corresponding path program 75 times [2018-10-04 09:39:04,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:39:04,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:39:04,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:04,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:39:04,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:04,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:05,012 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:39:05,152 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:39:05,411 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:39:05,771 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:39:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3705 backedges. 2964 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:05,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:39:05,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:39:05,860 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:39:06,015 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-04 09:39:06,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:39:06,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:39:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3705 backedges. 2964 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:06,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:39:06,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-04 09:39:06,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 09:39:06,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 09:39:06,358 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:39:06,358 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 80 states. [2018-10-04 09:39:07,186 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:39:08,149 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 9 [2018-10-04 09:39:08,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:39:08,391 INFO L93 Difference]: Finished difference Result 364 states and 368 transitions. [2018-10-04 09:39:08,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 09:39:08,392 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 197 [2018-10-04 09:39:08,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:39:08,393 INFO L225 Difference]: With dead ends: 364 [2018-10-04 09:39:08,393 INFO L226 Difference]: Without dead ends: 201 [2018-10-04 09:39:08,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.2s impTime 13 [2018-10-04 09:39:08,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-04 09:39:08,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-10-04 09:39:08,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-04 09:39:08,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2018-10-04 09:39:08,418 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 197 [2018-10-04 09:39:08,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:39:08,418 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2018-10-04 09:39:08,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 09:39:08,418 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2018-10-04 09:39:08,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-04 09:39:08,419 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:39:08,419 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 1, 1, 1, 1, 1] [2018-10-04 09:39:08,420 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:39:08,420 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:39:08,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1372678382, now seen corresponding path program 76 times [2018-10-04 09:39:08,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:39:08,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:39:08,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:08,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:39:08,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:08,581 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:39:08,674 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:39:08,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 856 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:08,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:39:08,789 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:39:08,796 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:39:08,887 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:39:08,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:39:08,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:39:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 856 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:09,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:39:09,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 09:39:09,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 09:39:09,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 09:39:09,484 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:39:09,484 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand 42 states. [2018-10-04 09:39:09,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:39:09,768 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2018-10-04 09:39:09,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 09:39:09,773 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 198 [2018-10-04 09:39:09,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:39:09,774 INFO L225 Difference]: With dead ends: 215 [2018-10-04 09:39:09,774 INFO L226 Difference]: Without dead ends: 209 [2018-10-04 09:39:09,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.1s impTime 10 [2018-10-04 09:39:09,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-10-04 09:39:09,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 205. [2018-10-04 09:39:09,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-04 09:39:09,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-10-04 09:39:09,800 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 198 [2018-10-04 09:39:09,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:39:09,800 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-10-04 09:39:09,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 09:39:09,800 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-10-04 09:39:09,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-04 09:39:09,801 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:39:09,801 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 1, 1, 1, 1, 1] [2018-10-04 09:39:09,802 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:39:09,802 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:39:09,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1792389512, now seen corresponding path program 77 times [2018-10-04 09:39:09,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:39:09,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:39:09,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:09,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:39:09,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:09,972 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:39:10,166 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:39:10,480 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:39:10,854 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:39:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3900 backedges. 3120 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:11,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:39:11,393 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:39:11,400 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:39:11,531 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-04 09:39:11,532 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:39:11,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:39:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3900 backedges. 3120 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:11,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:39:11,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-04 09:39:11,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 09:39:11,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 09:39:11,871 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:39:11,871 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 82 states. [2018-10-04 09:39:12,702 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:39:13,705 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 9 [2018-10-04 09:39:14,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:39:14,022 INFO L93 Difference]: Finished difference Result 373 states and 377 transitions. [2018-10-04 09:39:14,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 09:39:14,023 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 202 [2018-10-04 09:39:14,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:39:14,024 INFO L225 Difference]: With dead ends: 373 [2018-10-04 09:39:14,024 INFO L226 Difference]: Without dead ends: 206 [2018-10-04 09:39:14,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.7s impTime 15 [2018-10-04 09:39:14,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-04 09:39:14,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2018-10-04 09:39:14,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-10-04 09:39:14,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 208 transitions. [2018-10-04 09:39:14,044 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 208 transitions. Word has length 202 [2018-10-04 09:39:14,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:39:14,045 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 208 transitions. [2018-10-04 09:39:14,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 09:39:14,045 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 208 transitions. [2018-10-04 09:39:14,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-10-04 09:39:14,046 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:39:14,046 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 39, 1, 1, 1, 1, 1] [2018-10-04 09:39:14,046 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:39:14,046 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:39:14,046 INFO L82 PathProgramCache]: Analyzing trace with hash -185138751, now seen corresponding path program 78 times [2018-10-04 09:39:14,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:39:14,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:39:14,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:14,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:39:14,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:14,507 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:39:14,603 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:39:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 898 proven. 3042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:14,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:39:14,707 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:39:14,715 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:39:14,851 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-10-04 09:39:14,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:39:14,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:39:15,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 898 proven. 3042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:15,185 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:39:15,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 09:39:15,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 09:39:15,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 09:39:15,186 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:39:15,186 INFO L87 Difference]: Start difference. First operand 206 states and 208 transitions. Second operand 43 states. [2018-10-04 09:39:15,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:39:15,473 INFO L93 Difference]: Finished difference Result 220 states and 223 transitions. [2018-10-04 09:39:15,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 09:39:15,478 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 203 [2018-10-04 09:39:15,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:39:15,479 INFO L225 Difference]: With dead ends: 220 [2018-10-04 09:39:15,479 INFO L226 Difference]: Without dead ends: 214 [2018-10-04 09:39:15,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.2s impTime 11 [2018-10-04 09:39:15,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-10-04 09:39:15,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2018-10-04 09:39:15,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-10-04 09:39:15,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 212 transitions. [2018-10-04 09:39:15,506 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 212 transitions. Word has length 203 [2018-10-04 09:39:15,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:39:15,506 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 212 transitions. [2018-10-04 09:39:15,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 09:39:15,506 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 212 transitions. [2018-10-04 09:39:15,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-04 09:39:15,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:39:15,507 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 1, 1, 1, 1, 1] [2018-10-04 09:39:15,508 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:39:15,508 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:39:15,508 INFO L82 PathProgramCache]: Analyzing trace with hash -319083337, now seen corresponding path program 79 times [2018-10-04 09:39:15,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:39:15,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:39:15,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:15,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:39:15,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:15,726 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:39:15,900 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:39:16,142 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:39:16,516 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:39:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 3280 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:16,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:39:16,641 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:39:16,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:39:16,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:16,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:39:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 3280 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:17,171 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:39:17,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-04 09:39:17,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 09:39:17,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 09:39:17,172 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:39:17,172 INFO L87 Difference]: Start difference. First operand 210 states and 212 transitions. Second operand 84 states. [2018-10-04 09:39:17,834 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:39:18,734 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:39:19,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:39:19,277 INFO L93 Difference]: Finished difference Result 382 states and 386 transitions. [2018-10-04 09:39:19,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-04 09:39:19,277 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 207 [2018-10-04 09:39:19,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:39:19,278 INFO L225 Difference]: With dead ends: 382 [2018-10-04 09:39:19,278 INFO L226 Difference]: Without dead ends: 211 [2018-10-04 09:39:19,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.4s impTime 18 [2018-10-04 09:39:19,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-04 09:39:19,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-10-04 09:39:19,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-04 09:39:19,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-10-04 09:39:19,297 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 207 [2018-10-04 09:39:19,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:39:19,298 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-10-04 09:39:19,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 09:39:19,298 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-10-04 09:39:19,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-04 09:39:19,298 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:39:19,298 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 40, 40, 1, 1, 1, 1, 1] [2018-10-04 09:39:19,299 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:39:19,299 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:39:19,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1953503262, now seen corresponding path program 80 times [2018-10-04 09:39:19,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:39:19,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:39:19,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:19,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:39:19,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:19,673 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:39:19,830 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:39:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 941 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:19,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:39:19,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:39:19,979 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:39:20,070 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:39:20,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:39:20,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:39:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 941 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:20,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:39:20,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 09:39:20,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 09:39:20,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 09:39:20,414 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:39:20,415 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 44 states. [2018-10-04 09:39:20,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:39:20,694 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2018-10-04 09:39:20,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 09:39:20,694 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 208 [2018-10-04 09:39:20,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:39:20,695 INFO L225 Difference]: With dead ends: 225 [2018-10-04 09:39:20,695 INFO L226 Difference]: Without dead ends: 219 [2018-10-04 09:39:20,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.3s impTime 12 [2018-10-04 09:39:20,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-04 09:39:20,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 215. [2018-10-04 09:39:20,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-10-04 09:39:20,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2018-10-04 09:39:20,715 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 208 [2018-10-04 09:39:20,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:39:20,715 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2018-10-04 09:39:20,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 09:39:20,715 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2018-10-04 09:39:20,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-04 09:39:20,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:39:20,716 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 1, 1, 1, 1, 1] [2018-10-04 09:39:20,716 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:39:20,716 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:39:20,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1125633172, now seen corresponding path program 81 times [2018-10-04 09:39:20,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:39:20,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:39:20,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:20,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:39:20,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:20,897 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:39:21,013 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:39:21,249 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:39:21,533 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:39:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 3444 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:21,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:39:21,652 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:39:21,659 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:39:21,827 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-04 09:39:21,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:39:21,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:39:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 3444 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:22,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:39:22,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-04 09:39:22,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 09:39:22,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 09:39:22,179 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:39:22,179 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand 86 states. [2018-10-04 09:39:22,635 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:39:23,262 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:39:23,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:39:23,639 INFO L93 Difference]: Finished difference Result 391 states and 395 transitions. [2018-10-04 09:39:23,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-04 09:39:23,640 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 212 [2018-10-04 09:39:23,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:39:23,640 INFO L225 Difference]: With dead ends: 391 [2018-10-04 09:39:23,641 INFO L226 Difference]: Without dead ends: 216 [2018-10-04 09:39:23,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.0s impTime 20 [2018-10-04 09:39:23,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-10-04 09:39:23,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2018-10-04 09:39:23,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-10-04 09:39:23,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 218 transitions. [2018-10-04 09:39:23,662 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 218 transitions. Word has length 212 [2018-10-04 09:39:23,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:39:23,663 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 218 transitions. [2018-10-04 09:39:23,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 09:39:23,663 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 218 transitions. [2018-10-04 09:39:23,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-10-04 09:39:23,664 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:39:23,664 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 1, 1, 1, 1, 1] [2018-10-04 09:39:23,664 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:39:23,664 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:39:23,665 INFO L82 PathProgramCache]: Analyzing trace with hash -155129459, now seen corresponding path program 82 times [2018-10-04 09:39:23,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:39:23,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:39:23,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:23,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:39:23,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:23,842 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:39:23,997 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:39:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 985 proven. 3362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:24,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:39:24,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:39:24,194 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:39:24,297 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:39:24,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:39:24,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:39:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 985 proven. 3362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:24,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:39:24,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 09:39:24,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 09:39:24,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 09:39:24,912 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:39:24,912 INFO L87 Difference]: Start difference. First operand 216 states and 218 transitions. Second operand 45 states. [2018-10-04 09:39:25,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:39:25,173 INFO L93 Difference]: Finished difference Result 230 states and 233 transitions. [2018-10-04 09:39:25,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 09:39:25,173 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 213 [2018-10-04 09:39:25,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:39:25,174 INFO L225 Difference]: With dead ends: 230 [2018-10-04 09:39:25,174 INFO L226 Difference]: Without dead ends: 224 [2018-10-04 09:39:25,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.2s impTime 13 [2018-10-04 09:39:25,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2018-10-04 09:39:25,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2018-10-04 09:39:25,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-04 09:39:25,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2018-10-04 09:39:25,196 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 213 [2018-10-04 09:39:25,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:39:25,196 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2018-10-04 09:39:25,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 09:39:25,197 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2018-10-04 09:39:25,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-10-04 09:39:25,197 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:39:25,197 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 1, 1, 1, 1, 1] [2018-10-04 09:39:25,198 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:39:25,198 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:39:25,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1531687293, now seen corresponding path program 83 times [2018-10-04 09:39:25,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:39:25,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:39:25,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:25,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:39:25,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:25,381 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:39:25,600 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:39:26,007 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:39:26,405 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:39:26,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4515 backedges. 3612 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:26,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:39:26,581 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:39:26,588 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:39:26,735 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-04 09:39:26,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:39:26,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:39:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4515 backedges. 3612 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:27,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:39:27,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-04 09:39:27,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 09:39:27,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 09:39:27,103 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:39:27,103 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand 88 states. [2018-10-04 09:39:27,753 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:39:28,681 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:39:29,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:39:29,396 INFO L93 Difference]: Finished difference Result 400 states and 404 transitions. [2018-10-04 09:39:29,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-04 09:39:29,396 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 217 [2018-10-04 09:39:29,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:39:29,397 INFO L225 Difference]: With dead ends: 400 [2018-10-04 09:39:29,397 INFO L226 Difference]: Without dead ends: 221 [2018-10-04 09:39:29,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.6s impTime 22 [2018-10-04 09:39:29,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-04 09:39:29,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-10-04 09:39:29,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-10-04 09:39:29,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2018-10-04 09:39:29,418 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 217 [2018-10-04 09:39:29,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:39:29,418 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2018-10-04 09:39:29,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 09:39:29,418 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2018-10-04 09:39:29,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-04 09:39:29,419 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:39:29,419 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 1, 1, 1, 1, 1] [2018-10-04 09:39:29,419 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:39:29,419 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:39:29,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1128490282, now seen corresponding path program 84 times [2018-10-04 09:39:29,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:39:29,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:39:29,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:29,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:39:29,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:29,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:29,695 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:39:29,911 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:39:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 1030 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:30,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:39:30,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:39:30,039 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:39:30,192 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-04 09:39:30,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:39:30,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:39:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 1030 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:30,555 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:39:30,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 09:39:30,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 09:39:30,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 09:39:30,556 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:39:30,557 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand 46 states. [2018-10-04 09:39:30,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:39:30,890 INFO L93 Difference]: Finished difference Result 235 states and 238 transitions. [2018-10-04 09:39:30,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 09:39:30,890 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 218 [2018-10-04 09:39:30,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:39:30,891 INFO L225 Difference]: With dead ends: 235 [2018-10-04 09:39:30,891 INFO L226 Difference]: Without dead ends: 229 [2018-10-04 09:39:30,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.3s impTime 14 [2018-10-04 09:39:30,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-10-04 09:39:30,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 225. [2018-10-04 09:39:30,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-10-04 09:39:30,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2018-10-04 09:39:30,910 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 218 [2018-10-04 09:39:30,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:39:30,910 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2018-10-04 09:39:30,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 09:39:30,910 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2018-10-04 09:39:30,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-04 09:39:30,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:39:30,911 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 1, 1, 1, 1, 1] [2018-10-04 09:39:30,911 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:39:30,911 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:39:30,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1373260896, now seen corresponding path program 85 times [2018-10-04 09:39:30,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:39:30,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:39:30,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:30,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:39:30,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:31,068 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:39:31,288 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:39:31,604 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:39:32,002 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:39:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4730 backedges. 3784 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:32,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:39:32,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:39:32,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:39:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:32,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:39:32,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4730 backedges. 3784 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:32,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:39:32,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-04 09:39:32,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 09:39:32,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 09:39:32,663 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:39:32,663 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand 90 states. [2018-10-04 09:39:33,226 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:39:34,259 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 9 [2018-10-04 09:39:35,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:39:35,238 INFO L93 Difference]: Finished difference Result 409 states and 413 transitions. [2018-10-04 09:39:35,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-04 09:39:35,238 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 222 [2018-10-04 09:39:35,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:39:35,239 INFO L225 Difference]: With dead ends: 409 [2018-10-04 09:39:35,239 INFO L226 Difference]: Without dead ends: 226 [2018-10-04 09:39:35,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.7s impTime 23 [2018-10-04 09:39:35,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-10-04 09:39:35,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2018-10-04 09:39:35,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-10-04 09:39:35,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 228 transitions. [2018-10-04 09:39:35,261 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 228 transitions. Word has length 222 [2018-10-04 09:39:35,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:39:35,261 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 228 transitions. [2018-10-04 09:39:35,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 09:39:35,261 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 228 transitions. [2018-10-04 09:39:35,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-04 09:39:35,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:39:35,262 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 43, 1, 1, 1, 1, 1] [2018-10-04 09:39:35,262 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:39:35,262 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:39:35,262 INFO L82 PathProgramCache]: Analyzing trace with hash 2022550873, now seen corresponding path program 86 times [2018-10-04 09:39:35,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:39:35,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:39:35,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:35,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:39:35,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:35,540 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:39:35,685 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:39:35,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 1076 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:35,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:39:35,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:39:35,812 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:39:35,911 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:39:35,911 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:39:35,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:39:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 1076 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:36,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:39:36,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 09:39:36,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 09:39:36,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 09:39:36,282 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:39:36,282 INFO L87 Difference]: Start difference. First operand 226 states and 228 transitions. Second operand 47 states. [2018-10-04 09:39:36,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:39:36,605 INFO L93 Difference]: Finished difference Result 240 states and 243 transitions. [2018-10-04 09:39:36,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 09:39:36,606 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 223 [2018-10-04 09:39:36,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:39:36,607 INFO L225 Difference]: With dead ends: 240 [2018-10-04 09:39:36,607 INFO L226 Difference]: Without dead ends: 234 [2018-10-04 09:39:36,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.2s impTime 15 [2018-10-04 09:39:36,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-04 09:39:36,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 230. [2018-10-04 09:39:36,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-10-04 09:39:36,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 232 transitions. [2018-10-04 09:39:36,630 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 232 transitions. Word has length 223 [2018-10-04 09:39:36,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:39:36,630 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 232 transitions. [2018-10-04 09:39:36,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 09:39:36,630 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 232 transitions. [2018-10-04 09:39:36,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-10-04 09:39:36,631 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:39:36,631 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 1, 1, 1, 1, 1] [2018-10-04 09:39:36,631 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:39:36,631 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:39:36,631 INFO L82 PathProgramCache]: Analyzing trace with hash 664947791, now seen corresponding path program 87 times [2018-10-04 09:39:36,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:39:36,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:39:36,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:36,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:39:36,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:36,832 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:39:37,062 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:39:37,528 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:39:37,920 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:39:38,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 3960 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:38,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:39:38,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:39:38,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:39:38,321 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-04 09:39:38,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:39:38,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:39:38,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 3960 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:38,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:39:38,700 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-04 09:39:38,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 09:39:38,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 09:39:38,701 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:39:38,701 INFO L87 Difference]: Start difference. First operand 230 states and 232 transitions. Second operand 92 states. [2018-10-04 09:39:39,237 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:39:40,439 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 9 [2018-10-04 09:39:41,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:39:41,344 INFO L93 Difference]: Finished difference Result 418 states and 422 transitions. [2018-10-04 09:39:41,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-04 09:39:41,344 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 227 [2018-10-04 09:39:41,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:39:41,345 INFO L225 Difference]: With dead ends: 418 [2018-10-04 09:39:41,345 INFO L226 Difference]: Without dead ends: 231 [2018-10-04 09:39:41,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 1.9s impTime 24 [2018-10-04 09:39:41,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-10-04 09:39:41,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-10-04 09:39:41,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-10-04 09:39:41,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2018-10-04 09:39:41,368 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 227 [2018-10-04 09:39:41,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:39:41,368 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2018-10-04 09:39:41,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 09:39:41,368 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2018-10-04 09:39:41,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-10-04 09:39:41,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:39:41,369 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 44, 44, 1, 1, 1, 1, 1] [2018-10-04 09:39:41,369 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:39:41,369 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:39:41,369 INFO L82 PathProgramCache]: Analyzing trace with hash -402751946, now seen corresponding path program 88 times [2018-10-04 09:39:41,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:39:41,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:39:41,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:41,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:39:41,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:41,531 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:39:41,665 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:39:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 1123 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:41,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:39:41,851 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:39:41,859 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:39:41,968 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:39:41,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:39:41,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:39:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 1123 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:42,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:39:42,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 09:39:42,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 09:39:42,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 09:39:42,351 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:39:42,351 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand 48 states. [2018-10-04 09:39:42,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:39:42,652 INFO L93 Difference]: Finished difference Result 245 states and 248 transitions. [2018-10-04 09:39:42,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 09:39:42,657 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 228 [2018-10-04 09:39:42,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:39:42,658 INFO L225 Difference]: With dead ends: 245 [2018-10-04 09:39:42,658 INFO L226 Difference]: Without dead ends: 239 [2018-10-04 09:39:42,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.2s impTime 16 [2018-10-04 09:39:42,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-10-04 09:39:42,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2018-10-04 09:39:42,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-10-04 09:39:42,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2018-10-04 09:39:42,687 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 228 [2018-10-04 09:39:42,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:39:42,687 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2018-10-04 09:39:42,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 09:39:42,688 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2018-10-04 09:39:42,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-10-04 09:39:42,689 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:39:42,689 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 45, 1, 1, 1, 1, 1] [2018-10-04 09:39:42,689 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:39:42,689 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:39:42,689 INFO L82 PathProgramCache]: Analyzing trace with hash -564828500, now seen corresponding path program 89 times [2018-10-04 09:39:42,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:39:42,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:39:42,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:42,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:39:42,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:42,881 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:39:43,108 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:39:43,599 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 09:39:43,976 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 09:39:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5175 backedges. 4140 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:44,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:39:44,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:39:44,210 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:39:44,363 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-04 09:39:44,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:39:44,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:39:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5175 backedges. 4140 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:44,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:39:44,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-04 09:39:44,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 09:39:44,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 09:39:44,752 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:39:44,752 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand 94 states. [2018-10-04 09:39:45,478 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:39:46,549 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 9 [2018-10-04 09:39:47,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:39:47,552 INFO L93 Difference]: Finished difference Result 427 states and 431 transitions. [2018-10-04 09:39:47,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-04 09:39:47,552 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 232 [2018-10-04 09:39:47,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:39:47,553 INFO L225 Difference]: With dead ends: 427 [2018-10-04 09:39:47,553 INFO L226 Difference]: Without dead ends: 236 [2018-10-04 09:39:47,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.0s impTime 26 [2018-10-04 09:39:47,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2018-10-04 09:39:47,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2018-10-04 09:39:47,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-10-04 09:39:47,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 238 transitions. [2018-10-04 09:39:47,581 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 238 transitions. Word has length 232 [2018-10-04 09:39:47,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:39:47,582 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 238 transitions. [2018-10-04 09:39:47,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 09:39:47,582 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 238 transitions. [2018-10-04 09:39:47,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-10-04 09:39:47,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:39:47,583 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 45, 45, 1, 1, 1, 1, 1] [2018-10-04 09:39:47,583 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:39:47,583 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:39:47,583 INFO L82 PathProgramCache]: Analyzing trace with hash 522145061, now seen corresponding path program 90 times [2018-10-04 09:39:47,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:39:47,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:39:47,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:47,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:39:47,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:47,737 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:39:47,863 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:39:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 1171 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:48,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:39:48,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:39:48,062 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:39:48,230 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-04 09:39:48,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:39:48,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:39:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 1171 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:48,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:39:48,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 09:39:48,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 09:39:48,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 09:39:48,622 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:39:48,622 INFO L87 Difference]: Start difference. First operand 236 states and 238 transitions. Second operand 49 states. [2018-10-04 09:39:48,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:39:48,958 INFO L93 Difference]: Finished difference Result 250 states and 253 transitions. [2018-10-04 09:39:48,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 09:39:48,958 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 233 [2018-10-04 09:39:48,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:39:48,959 INFO L225 Difference]: With dead ends: 250 [2018-10-04 09:39:48,959 INFO L226 Difference]: Without dead ends: 244 [2018-10-04 09:39:48,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.2s impTime 17 [2018-10-04 09:39:48,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-10-04 09:39:48,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2018-10-04 09:39:48,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-10-04 09:39:48,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2018-10-04 09:39:48,988 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 233 [2018-10-04 09:39:48,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:39:48,988 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2018-10-04 09:39:48,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 09:39:48,989 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2018-10-04 09:39:48,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-10-04 09:39:48,989 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:39:48,989 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 1, 1, 1, 1, 1] [2018-10-04 09:39:48,990 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:39:48,990 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:39:48,990 INFO L82 PathProgramCache]: Analyzing trace with hash -377018853, now seen corresponding path program 91 times [2018-10-04 09:39:48,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:39:48,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:39:48,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:48,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:39:48,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:49,176 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:39:49,321 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:39:49,746 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:39:50,348 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:39:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 4324 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:50,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:39:50,545 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:39:50,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:39:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:50,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:39:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 4324 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:51,103 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:39:51,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-04 09:39:51,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 09:39:51,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 09:39:51,104 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:39:51,104 INFO L87 Difference]: Start difference. First operand 240 states and 242 transitions. Second operand 96 states. [2018-10-04 09:39:51,610 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:39:52,535 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 9 [2018-10-04 09:39:53,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:39:53,380 INFO L93 Difference]: Finished difference Result 436 states and 440 transitions. [2018-10-04 09:39:53,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-04 09:39:53,380 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 237 [2018-10-04 09:39:53,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:39:53,381 INFO L225 Difference]: With dead ends: 436 [2018-10-04 09:39:53,381 INFO L226 Difference]: Without dead ends: 241 [2018-10-04 09:39:53,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 1.8s impTime 27 [2018-10-04 09:39:53,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-10-04 09:39:53,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-10-04 09:39:53,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-10-04 09:39:53,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 243 transitions. [2018-10-04 09:39:53,406 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 243 transitions. Word has length 237 [2018-10-04 09:39:53,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:39:53,406 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 243 transitions. [2018-10-04 09:39:53,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 09:39:53,406 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 243 transitions. [2018-10-04 09:39:53,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-04 09:39:53,407 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:39:53,407 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1, 1, 1, 1] [2018-10-04 09:39:53,407 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:39:53,407 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:39:53,407 INFO L82 PathProgramCache]: Analyzing trace with hash 125264706, now seen corresponding path program 92 times [2018-10-04 09:39:53,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:39:53,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:39:53,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:53,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:39:53,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:53,581 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:39:53,740 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:39:53,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 1220 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:53,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:39:53,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:39:53,949 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:39:54,060 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:39:54,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:39:54,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:39:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 1220 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:54,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:39:54,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 09:39:54,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 09:39:54,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 09:39:54,473 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:39:54,473 INFO L87 Difference]: Start difference. First operand 241 states and 243 transitions. Second operand 50 states. [2018-10-04 09:39:54,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:39:54,852 INFO L93 Difference]: Finished difference Result 255 states and 258 transitions. [2018-10-04 09:39:54,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 09:39:54,852 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 238 [2018-10-04 09:39:54,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:39:54,853 INFO L225 Difference]: With dead ends: 255 [2018-10-04 09:39:54,853 INFO L226 Difference]: Without dead ends: 249 [2018-10-04 09:39:54,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.2s impTime 18 [2018-10-04 09:39:54,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-10-04 09:39:54,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 245. [2018-10-04 09:39:54,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-10-04 09:39:54,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2018-10-04 09:39:54,887 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 238 [2018-10-04 09:39:54,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:39:54,887 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2018-10-04 09:39:54,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 09:39:54,888 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2018-10-04 09:39:54,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-10-04 09:39:54,889 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:39:54,889 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 47, 1, 1, 1, 1, 1] [2018-10-04 09:39:54,889 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:39:54,889 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:39:54,889 INFO L82 PathProgramCache]: Analyzing trace with hash 494724536, now seen corresponding path program 93 times [2018-10-04 09:39:54,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:39:54,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:39:54,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:54,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:39:54,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:39:55,080 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:39:55,530 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:39:56,051 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:39:56,429 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:39:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5640 backedges. 4512 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:56,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:39:56,668 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:39:56,675 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:39:56,870 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-04 09:39:56,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:39:56,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:39:57,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5640 backedges. 4512 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:39:57,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:39:57,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-04 09:39:57,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 09:39:57,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 09:39:57,282 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:39:57,282 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand 98 states. [2018-10-04 09:39:57,771 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:39:58,712 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 9 [2018-10-04 09:39:59,862 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 9 [2018-10-04 09:39:59,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:39:59,922 INFO L93 Difference]: Finished difference Result 445 states and 449 transitions. [2018-10-04 09:39:59,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-04 09:39:59,922 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 242 [2018-10-04 09:39:59,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:39:59,923 INFO L225 Difference]: With dead ends: 445 [2018-10-04 09:39:59,923 INFO L226 Difference]: Without dead ends: 246 [2018-10-04 09:39:59,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.1s impTime 10 [2018-10-04 09:39:59,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-10-04 09:39:59,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2018-10-04 09:39:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-10-04 09:39:59,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 248 transitions. [2018-10-04 09:39:59,948 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 248 transitions. Word has length 242 [2018-10-04 09:39:59,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:39:59,948 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 248 transitions. [2018-10-04 09:39:59,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 09:39:59,949 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 248 transitions. [2018-10-04 09:39:59,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-04 09:39:59,949 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:39:59,949 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 47, 47, 1, 1, 1, 1, 1] [2018-10-04 09:39:59,950 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:39:59,950 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:39:59,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1883780879, now seen corresponding path program 94 times [2018-10-04 09:39:59,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:39:59,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:39:59,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:59,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:39:59,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:39:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:00,125 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:40:00,458 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:00,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 1270 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:00,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:00,746 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:00,755 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:40:00,869 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:40:00,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:00,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:01,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 1270 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:01,273 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:01,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 09:40:01,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 09:40:01,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 09:40:01,274 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:01,274 INFO L87 Difference]: Start difference. First operand 246 states and 248 transitions. Second operand 51 states. [2018-10-04 09:40:01,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:01,577 INFO L93 Difference]: Finished difference Result 260 states and 263 transitions. [2018-10-04 09:40:01,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 09:40:01,577 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 243 [2018-10-04 09:40:01,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:01,578 INFO L225 Difference]: With dead ends: 260 [2018-10-04 09:40:01,578 INFO L226 Difference]: Without dead ends: 254 [2018-10-04 09:40:01,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.4s impTime 19 [2018-10-04 09:40:01,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-10-04 09:40:01,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 250. [2018-10-04 09:40:01,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-10-04 09:40:01,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 252 transitions. [2018-10-04 09:40:01,604 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 252 transitions. Word has length 243 [2018-10-04 09:40:01,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:01,604 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 252 transitions. [2018-10-04 09:40:01,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 09:40:01,604 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 252 transitions. [2018-10-04 09:40:01,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-10-04 09:40:01,605 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:01,605 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 48, 1, 1, 1, 1, 1] [2018-10-04 09:40:01,605 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:01,605 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:01,606 INFO L82 PathProgramCache]: Analyzing trace with hash 514120679, now seen corresponding path program 95 times [2018-10-04 09:40:01,606 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:01,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:01,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:01,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:01,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:01,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:01,806 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:40:01,977 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:02,276 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:40:02,550 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:40:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5880 backedges. 4704 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:02,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:02,770 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:02,778 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:40:02,948 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-04 09:40:02,949 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:02,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:03,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5880 backedges. 4704 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:03,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:03,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-04 09:40:03,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 09:40:03,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 09:40:03,359 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:03,359 INFO L87 Difference]: Start difference. First operand 250 states and 252 transitions. Second operand 100 states. [2018-10-04 09:40:03,680 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:40:04,269 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:40:05,097 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 9 [2018-10-04 09:40:05,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:05,213 INFO L93 Difference]: Finished difference Result 454 states and 458 transitions. [2018-10-04 09:40:05,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-04 09:40:05,213 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 247 [2018-10-04 09:40:05,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:05,214 INFO L225 Difference]: With dead ends: 454 [2018-10-04 09:40:05,214 INFO L226 Difference]: Without dead ends: 251 [2018-10-04 09:40:05,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.2s impTime 12 [2018-10-04 09:40:05,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-10-04 09:40:05,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-10-04 09:40:05,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-10-04 09:40:05,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 253 transitions. [2018-10-04 09:40:05,243 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 253 transitions. Word has length 247 [2018-10-04 09:40:05,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:05,244 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 253 transitions. [2018-10-04 09:40:05,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 09:40:05,244 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 253 transitions. [2018-10-04 09:40:05,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-10-04 09:40:05,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:05,245 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 48, 48, 1, 1, 1, 1, 1] [2018-10-04 09:40:05,245 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:05,245 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:05,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1107028914, now seen corresponding path program 96 times [2018-10-04 09:40:05,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:05,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:05,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:05,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:05,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:05,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:05,532 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:40:05,710 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 1321 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:05,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:05,931 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:05,939 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:40:06,122 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-04 09:40:06,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:06,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 1321 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:06,537 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:06,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 09:40:06,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 09:40:06,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 09:40:06,538 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:06,538 INFO L87 Difference]: Start difference. First operand 251 states and 253 transitions. Second operand 52 states. [2018-10-04 09:40:06,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:06,874 INFO L93 Difference]: Finished difference Result 265 states and 268 transitions. [2018-10-04 09:40:06,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 09:40:06,874 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 248 [2018-10-04 09:40:06,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:06,875 INFO L225 Difference]: With dead ends: 265 [2018-10-04 09:40:06,875 INFO L226 Difference]: Without dead ends: 259 [2018-10-04 09:40:06,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.3s impTime 20 [2018-10-04 09:40:06,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-10-04 09:40:06,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 255. [2018-10-04 09:40:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-10-04 09:40:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 257 transitions. [2018-10-04 09:40:06,901 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 257 transitions. Word has length 248 [2018-10-04 09:40:06,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:06,902 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 257 transitions. [2018-10-04 09:40:06,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 09:40:06,902 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 257 transitions. [2018-10-04 09:40:06,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-10-04 09:40:06,902 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:06,903 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 49, 1, 1, 1, 1, 1] [2018-10-04 09:40:06,917 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:06,917 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:06,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1827811524, now seen corresponding path program 97 times [2018-10-04 09:40:06,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:06,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:06,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:06,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:06,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:07,115 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:40:07,231 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:07,447 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:07,803 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:40:08,216 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:40:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6125 backedges. 4900 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:08,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:08,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:08,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:40:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:08,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:08,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6125 backedges. 4900 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:08,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:08,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-04 09:40:08,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 09:40:08,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 09:40:08,980 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:08,980 INFO L87 Difference]: Start difference. First operand 255 states and 257 transitions. Second operand 102 states. [2018-10-04 09:40:09,454 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:40:10,573 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:40:12,089 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 9 [2018-10-04 09:40:12,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:12,416 INFO L93 Difference]: Finished difference Result 463 states and 467 transitions. [2018-10-04 09:40:12,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-04 09:40:12,416 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 252 [2018-10-04 09:40:12,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:12,417 INFO L225 Difference]: With dead ends: 463 [2018-10-04 09:40:12,417 INFO L226 Difference]: Without dead ends: 256 [2018-10-04 09:40:12,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.0s impTime 14 [2018-10-04 09:40:12,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-10-04 09:40:12,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2018-10-04 09:40:12,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-04 09:40:12,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 258 transitions. [2018-10-04 09:40:12,447 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 258 transitions. Word has length 252 [2018-10-04 09:40:12,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:12,447 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 258 transitions. [2018-10-04 09:40:12,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 09:40:12,447 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 258 transitions. [2018-10-04 09:40:12,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-10-04 09:40:12,448 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:12,448 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 49, 49, 1, 1, 1, 1, 1] [2018-10-04 09:40:12,448 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:12,449 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:12,449 INFO L82 PathProgramCache]: Analyzing trace with hash -803659587, now seen corresponding path program 98 times [2018-10-04 09:40:12,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:12,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:12,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:12,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:40:12,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:12,654 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:40:12,751 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:12,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 1373 proven. 4802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:12,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:12,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:12,994 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:40:13,108 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:40:13,108 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:13,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 1373 proven. 4802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:13,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:13,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 09:40:13,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 09:40:13,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 09:40:13,540 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:13,540 INFO L87 Difference]: Start difference. First operand 256 states and 258 transitions. Second operand 53 states. [2018-10-04 09:40:13,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:13,881 INFO L93 Difference]: Finished difference Result 270 states and 273 transitions. [2018-10-04 09:40:13,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 09:40:13,881 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 253 [2018-10-04 09:40:13,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:13,882 INFO L225 Difference]: With dead ends: 270 [2018-10-04 09:40:13,882 INFO L226 Difference]: Without dead ends: 264 [2018-10-04 09:40:13,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.2s impTime 21 [2018-10-04 09:40:13,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-10-04 09:40:13,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 260. [2018-10-04 09:40:13,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2018-10-04 09:40:13,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 262 transitions. [2018-10-04 09:40:13,913 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 262 transitions. Word has length 253 [2018-10-04 09:40:13,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:13,913 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 262 transitions. [2018-10-04 09:40:13,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 09:40:13,913 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 262 transitions. [2018-10-04 09:40:13,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-10-04 09:40:13,914 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:13,914 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 50, 1, 1, 1, 1, 1] [2018-10-04 09:40:13,914 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:13,914 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:13,914 INFO L82 PathProgramCache]: Analyzing trace with hash 465399219, now seen corresponding path program 99 times [2018-10-04 09:40:13,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:13,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:13,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:13,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:13,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:14,098 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:40:14,337 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:14,587 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:14,732 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:40:14,950 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:40:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6375 backedges. 5100 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:15,152 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:15,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:15,159 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:40:15,377 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-10-04 09:40:15,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:15,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:16,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6375 backedges. 5100 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:16,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:16,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-04 09:40:16,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-04 09:40:16,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-04 09:40:16,109 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:16,109 INFO L87 Difference]: Start difference. First operand 260 states and 262 transitions. Second operand 104 states. [2018-10-04 09:40:16,355 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:40:16,816 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 9 [2018-10-04 09:40:17,345 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 9 [2018-10-04 09:40:17,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:17,451 INFO L93 Difference]: Finished difference Result 472 states and 476 transitions. [2018-10-04 09:40:17,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-04 09:40:17,451 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 257 [2018-10-04 09:40:17,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:17,452 INFO L225 Difference]: With dead ends: 472 [2018-10-04 09:40:17,452 INFO L226 Difference]: Without dead ends: 261 [2018-10-04 09:40:17,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.1s impTime 15 [2018-10-04 09:40:17,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-10-04 09:40:17,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2018-10-04 09:40:17,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-10-04 09:40:17,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 263 transitions. [2018-10-04 09:40:17,479 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 263 transitions. Word has length 257 [2018-10-04 09:40:17,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:17,479 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 263 transitions. [2018-10-04 09:40:17,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-04 09:40:17,479 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 263 transitions. [2018-10-04 09:40:17,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-10-04 09:40:17,480 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:17,480 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 50, 50, 1, 1, 1, 1, 1] [2018-10-04 09:40:17,480 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:17,481 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:17,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1064997210, now seen corresponding path program 100 times [2018-10-04 09:40:17,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:17,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:17,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:17,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:17,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:17,675 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:40:17,836 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:18,054 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:18,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 1426 proven. 5000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:18,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:18,188 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:18,196 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:40:18,319 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:40:18,319 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:18,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 1426 proven. 5000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:18,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:18,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 09:40:18,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 09:40:18,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 09:40:18,871 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:18,871 INFO L87 Difference]: Start difference. First operand 261 states and 263 transitions. Second operand 54 states. [2018-10-04 09:40:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:19,227 INFO L93 Difference]: Finished difference Result 275 states and 278 transitions. [2018-10-04 09:40:19,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 09:40:19,227 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 258 [2018-10-04 09:40:19,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:19,228 INFO L225 Difference]: With dead ends: 275 [2018-10-04 09:40:19,228 INFO L226 Difference]: Without dead ends: 269 [2018-10-04 09:40:19,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.3s impTime 7 [2018-10-04 09:40:19,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-10-04 09:40:19,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 265. [2018-10-04 09:40:19,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-10-04 09:40:19,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 267 transitions. [2018-10-04 09:40:19,257 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 267 transitions. Word has length 258 [2018-10-04 09:40:19,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:19,258 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 267 transitions. [2018-10-04 09:40:19,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 09:40:19,258 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 267 transitions. [2018-10-04 09:40:19,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-10-04 09:40:19,258 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:19,259 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 51, 1, 1, 1, 1, 1] [2018-10-04 09:40:19,259 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:19,259 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:19,259 INFO L82 PathProgramCache]: Analyzing trace with hash 629884880, now seen corresponding path program 101 times [2018-10-04 09:40:19,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:19,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:19,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:19,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:19,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:19,457 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:40:19,689 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:19,831 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:20,025 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:40:20,276 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:40:20,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6630 backedges. 5304 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:20,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:20,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:20,618 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:40:20,942 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-10-04 09:40:20,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:20,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6630 backedges. 5304 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:21,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:21,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-04 09:40:21,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-04 09:40:21,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-04 09:40:21,601 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:21,601 INFO L87 Difference]: Start difference. First operand 265 states and 267 transitions. Second operand 106 states. [2018-10-04 09:40:21,954 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:40:23,340 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 9 [2018-10-04 09:40:24,751 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:40:25,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:25,100 INFO L93 Difference]: Finished difference Result 481 states and 485 transitions. [2018-10-04 09:40:25,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-04 09:40:25,101 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 262 [2018-10-04 09:40:25,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:25,101 INFO L225 Difference]: With dead ends: 481 [2018-10-04 09:40:25,101 INFO L226 Difference]: Without dead ends: 266 [2018-10-04 09:40:25,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 1.8s impTime 13 [2018-10-04 09:40:25,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-10-04 09:40:25,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2018-10-04 09:40:25,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2018-10-04 09:40:25,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 268 transitions. [2018-10-04 09:40:25,136 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 268 transitions. Word has length 262 [2018-10-04 09:40:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:25,136 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 268 transitions. [2018-10-04 09:40:25,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-04 09:40:25,136 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 268 transitions. [2018-10-04 09:40:25,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-10-04 09:40:25,137 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:25,137 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 52, 51, 51, 1, 1, 1, 1, 1] [2018-10-04 09:40:25,137 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:25,138 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:25,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1501211511, now seen corresponding path program 102 times [2018-10-04 09:40:25,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:25,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:25,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:25,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:25,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:25,353 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:40:25,508 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:25,705 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 1480 proven. 5202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:25,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:25,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:25,911 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:40:26,118 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-10-04 09:40:26,118 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:26,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 1480 proven. 5202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:26,585 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:26,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 09:40:26,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 09:40:26,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 09:40:26,586 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:26,586 INFO L87 Difference]: Start difference. First operand 266 states and 268 transitions. Second operand 55 states. [2018-10-04 09:40:26,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:26,948 INFO L93 Difference]: Finished difference Result 280 states and 283 transitions. [2018-10-04 09:40:26,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 09:40:26,949 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 263 [2018-10-04 09:40:26,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:26,949 INFO L225 Difference]: With dead ends: 280 [2018-10-04 09:40:26,949 INFO L226 Difference]: Without dead ends: 274 [2018-10-04 09:40:26,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.3s impTime 9 [2018-10-04 09:40:26,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2018-10-04 09:40:26,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2018-10-04 09:40:26,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-10-04 09:40:26,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 272 transitions. [2018-10-04 09:40:26,980 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 272 transitions. Word has length 263 [2018-10-04 09:40:26,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:26,980 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 272 transitions. [2018-10-04 09:40:26,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 09:40:26,980 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 272 transitions. [2018-10-04 09:40:26,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-04 09:40:26,981 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:26,981 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 52, 1, 1, 1, 1, 1] [2018-10-04 09:40:26,981 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:26,982 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:26,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1240278145, now seen corresponding path program 103 times [2018-10-04 09:40:26,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:26,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:26,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:26,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:26,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:27,202 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:40:27,444 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:27,795 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:28,206 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:40:28,605 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:40:29,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6890 backedges. 5512 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:29,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:29,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:29,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:40:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:29,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6890 backedges. 5512 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:29,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:29,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-04 09:40:29,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-04 09:40:29,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-04 09:40:29,604 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:29,604 INFO L87 Difference]: Start difference. First operand 270 states and 272 transitions. Second operand 108 states. [2018-10-04 09:40:29,859 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:40:30,867 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:40:32,489 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 9 [2018-10-04 09:40:33,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:33,237 INFO L93 Difference]: Finished difference Result 490 states and 494 transitions. [2018-10-04 09:40:33,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-04 09:40:33,237 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 267 [2018-10-04 09:40:33,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:33,238 INFO L225 Difference]: With dead ends: 490 [2018-10-04 09:40:33,238 INFO L226 Difference]: Without dead ends: 271 [2018-10-04 09:40:33,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.6s impTime 14 [2018-10-04 09:40:33,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-10-04 09:40:33,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-10-04 09:40:33,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-10-04 09:40:33,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 273 transitions. [2018-10-04 09:40:33,267 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 273 transitions. Word has length 267 [2018-10-04 09:40:33,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:33,267 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 273 transitions. [2018-10-04 09:40:33,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-04 09:40:33,267 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 273 transitions. [2018-10-04 09:40:33,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-10-04 09:40:33,268 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:33,268 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 52, 52, 1, 1, 1, 1, 1] [2018-10-04 09:40:33,268 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:33,268 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:33,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1999690342, now seen corresponding path program 104 times [2018-10-04 09:40:33,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:33,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:33,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:33,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:40:33,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:33,472 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:40:33,586 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:33,691 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 1535 proven. 5408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:33,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:33,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:33,844 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:40:33,982 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:40:33,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:33,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 1535 proven. 5408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:34,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:34,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 09:40:34,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 09:40:34,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 09:40:34,434 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:34,434 INFO L87 Difference]: Start difference. First operand 271 states and 273 transitions. Second operand 56 states. [2018-10-04 09:40:34,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:34,837 INFO L93 Difference]: Finished difference Result 285 states and 288 transitions. [2018-10-04 09:40:34,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 09:40:34,837 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 268 [2018-10-04 09:40:34,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:34,838 INFO L225 Difference]: With dead ends: 285 [2018-10-04 09:40:34,838 INFO L226 Difference]: Without dead ends: 279 [2018-10-04 09:40:34,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.2s impTime 11 [2018-10-04 09:40:34,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-10-04 09:40:34,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 275. [2018-10-04 09:40:34,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-10-04 09:40:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 277 transitions. [2018-10-04 09:40:34,868 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 277 transitions. Word has length 268 [2018-10-04 09:40:34,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:34,868 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 277 transitions. [2018-10-04 09:40:34,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 09:40:34,869 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 277 transitions. [2018-10-04 09:40:34,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-10-04 09:40:34,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:34,869 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 53, 1, 1, 1, 1, 1] [2018-10-04 09:40:34,870 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:34,870 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:34,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1751242020, now seen corresponding path program 105 times [2018-10-04 09:40:34,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:34,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:34,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:34,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:34,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:35,083 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:40:35,319 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:35,661 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:36,410 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:40:36,862 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:40:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7155 backedges. 5724 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:37,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:37,328 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:37,337 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:40:37,570 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-10-04 09:40:37,570 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:37,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7155 backedges. 5724 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:38,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:38,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-10-04 09:40:38,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-04 09:40:38,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-04 09:40:38,024 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:38,024 INFO L87 Difference]: Start difference. First operand 275 states and 277 transitions. Second operand 110 states. [2018-10-04 09:40:38,287 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 09:40:39,604 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 9 [2018-10-04 09:40:41,015 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 10 [2018-10-04 09:40:41,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:41,957 INFO L93 Difference]: Finished difference Result 499 states and 503 transitions. [2018-10-04 09:40:41,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-04 09:40:41,957 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 272 [2018-10-04 09:40:41,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:41,958 INFO L225 Difference]: With dead ends: 499 [2018-10-04 09:40:41,958 INFO L226 Difference]: Without dead ends: 276 [2018-10-04 09:40:41,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time 2.9s impTime 18 [2018-10-04 09:40:41,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2018-10-04 09:40:41,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2018-10-04 09:40:41,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2018-10-04 09:40:41,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 278 transitions. [2018-10-04 09:40:41,996 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 278 transitions. Word has length 272 [2018-10-04 09:40:41,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:41,997 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 278 transitions. [2018-10-04 09:40:41,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-04 09:40:41,997 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 278 transitions. [2018-10-04 09:40:41,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-10-04 09:40:41,997 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:41,998 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 53, 53, 1, 1, 1, 1, 1] [2018-10-04 09:40:41,998 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:41,998 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:41,998 INFO L82 PathProgramCache]: Analyzing trace with hash -104962987, now seen corresponding path program 106 times [2018-10-04 09:40:41,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:41,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:41,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:41,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:41,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:42,193 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:40:42,337 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:42,451 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7209 backedges. 1591 proven. 5618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:42,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:42,596 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:42,603 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:40:42,741 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:40:42,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:42,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7209 backedges. 1591 proven. 5618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:43,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:43,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 09:40:43,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 09:40:43,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 09:40:43,238 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:43,238 INFO L87 Difference]: Start difference. First operand 276 states and 278 transitions. Second operand 57 states. [2018-10-04 09:40:43,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:43,679 INFO L93 Difference]: Finished difference Result 290 states and 293 transitions. [2018-10-04 09:40:43,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 09:40:43,679 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 273 [2018-10-04 09:40:43,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:43,680 INFO L225 Difference]: With dead ends: 290 [2018-10-04 09:40:43,680 INFO L226 Difference]: Without dead ends: 284 [2018-10-04 09:40:43,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.2s impTime 9 [2018-10-04 09:40:43,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2018-10-04 09:40:43,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 280. [2018-10-04 09:40:43,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-10-04 09:40:43,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 282 transitions. [2018-10-04 09:40:43,707 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 282 transitions. Word has length 273 [2018-10-04 09:40:43,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:43,707 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 282 transitions. [2018-10-04 09:40:43,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 09:40:43,707 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 282 transitions. [2018-10-04 09:40:43,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-10-04 09:40:43,708 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:43,708 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 54, 54, 1, 1, 1, 1, 1] [2018-10-04 09:40:43,708 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:43,708 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:43,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1553521333, now seen corresponding path program 107 times [2018-10-04 09:40:43,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:43,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:43,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:43,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:43,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:43,900 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:40:44,063 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:44,335 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:44,868 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:40:45,279 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:40:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7425 backedges. 5940 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:45,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:45,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:45,787 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:40:45,989 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-04 09:40:45,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:45,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:46,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7425 backedges. 5940 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:46,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:46,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-10-04 09:40:46,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-04 09:40:46,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-04 09:40:46,712 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:46,713 INFO L87 Difference]: Start difference. First operand 280 states and 282 transitions. Second operand 112 states. [2018-10-04 09:40:46,905 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:40:48,280 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 09:40:50,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:50,495 INFO L93 Difference]: Finished difference Result 508 states and 512 transitions. [2018-10-04 09:40:50,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-04 09:40:50,496 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 277 [2018-10-04 09:40:50,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:50,496 INFO L225 Difference]: With dead ends: 508 [2018-10-04 09:40:50,496 INFO L226 Difference]: Without dead ends: 281 [2018-10-04 09:40:50,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s Time 2.6s impTime 24 [2018-10-04 09:40:50,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-10-04 09:40:50,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2018-10-04 09:40:50,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-10-04 09:40:50,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 283 transitions. [2018-10-04 09:40:50,527 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 283 transitions. Word has length 277 [2018-10-04 09:40:50,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:50,527 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 283 transitions. [2018-10-04 09:40:50,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-04 09:40:50,527 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 283 transitions. [2018-10-04 09:40:50,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-10-04 09:40:50,528 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:50,528 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 55, 54, 54, 1, 1, 1, 1, 1] [2018-10-04 09:40:50,528 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:50,529 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:50,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1476595854, now seen corresponding path program 108 times [2018-10-04 09:40:50,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:50,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:50,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:50,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:50,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:50,839 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:40:51,106 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:51,308 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7480 backedges. 1648 proven. 5832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:51,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:40:51,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:40:51,608 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:40:51,823 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-04 09:40:51,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:40:51,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:40:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7480 backedges. 1648 proven. 5832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:40:52,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:40:52,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 09:40:52,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 09:40:52,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 09:40:52,306 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:40:52,307 INFO L87 Difference]: Start difference. First operand 281 states and 283 transitions. Second operand 58 states. [2018-10-04 09:40:52,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:40:52,688 INFO L93 Difference]: Finished difference Result 295 states and 298 transitions. [2018-10-04 09:40:52,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 09:40:52,689 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 278 [2018-10-04 09:40:52,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:40:52,689 INFO L225 Difference]: With dead ends: 295 [2018-10-04 09:40:52,689 INFO L226 Difference]: Without dead ends: 289 [2018-10-04 09:40:52,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.5s impTime 11 [2018-10-04 09:40:52,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2018-10-04 09:40:52,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 285. [2018-10-04 09:40:52,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2018-10-04 09:40:52,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 287 transitions. [2018-10-04 09:40:52,721 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 287 transitions. Word has length 278 [2018-10-04 09:40:52,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:40:52,722 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 287 transitions. [2018-10-04 09:40:52,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 09:40:52,722 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 287 transitions. [2018-10-04 09:40:52,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-10-04 09:40:52,722 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:40:52,723 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 55, 1, 1, 1, 1, 1] [2018-10-04 09:40:52,723 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:40:52,723 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:40:52,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1426007576, now seen corresponding path program 109 times [2018-10-04 09:40:52,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:40:52,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:40:52,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:52,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:40:52,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:40:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:40:52,977 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:40:53,179 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:40:53,490 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 Received shutdown request... [2018-10-04 09:40:53,725 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 09:40:53,728 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 09:40:53,729 INFO L202 PluginConnector]: Adding new model down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 09:40:53 BoogieIcfgContainer [2018-10-04 09:40:53,729 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 09:40:53,730 INFO L168 Benchmark]: Toolchain (without parser) took 232890.87 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 41.9 MB). Free memory was 1.4 GB in the beginning and 954.3 MB in the end (delta: 487.7 MB). Peak memory consumption was 529.6 MB. Max. memory is 7.1 GB. [2018-10-04 09:40:53,732 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:40:53,732 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.29 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:40:53,733 INFO L168 Benchmark]: Boogie Preprocessor took 20.41 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:40:53,733 INFO L168 Benchmark]: RCFGBuilder took 391.35 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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. [2018-10-04 09:40:53,734 INFO L168 Benchmark]: TraceAbstraction took 232433.85 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 41.9 MB). Free memory was 1.4 GB in the beginning and 954.3 MB in the end (delta: 466.6 MB). Peak memory consumption was 508.5 MB. Max. memory is 7.1 GB. [2018-10-04 09:40:53,736 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 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.29 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 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 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 391.35 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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 232433.85 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 41.9 MB). Free memory was 1.4 GB in the beginning and 954.3 MB in the end (delta: 466.6 MB). Peak memory consumption was 508.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 76). Cancelled while BasicCegarLoop was analyzing trace of length 283 with TraceHistMax 56, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 281 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. TIMEOUT Result, 232.3s OverallTime, 113 OverallIterations, 56 TraceHistogramMax, 94.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3542 SDtfs, 8300 SDslu, 70393 SDs, 0 SdLazy, 77000 SolverSat, 1854 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 39.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23369 GetRequests, 17150 SyntacticMatches, 0 SemanticMatches, 6219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 132.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=285occurred in iteration=112, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.7s AutomataMinimizationTime, 112 MinimizatonAttempts, 226 StatesRemovedByMinimization, 57 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.8s SsaConstructionTime, 9.8s SatisfiabilityAnalysisTime, 117.0s InterpolantComputationTime, 31350 NumberOfCodeBlocks, 31350 NumberOfCodeBlocksAsserted, 1777 NumberOfCheckSat, 31130 ConstructedInterpolants, 0 QuantifiedInterpolants, 17155034 SizeOfPredicates, 216 NumberOfNonLiveVariables, 49950 ConjunctsInSsa, 6318 ConjunctsInUnsatCore, 220 InterpolantComputations, 4 PerfectInterpolantSequences, 286220/557480 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/down.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_09-40-53-746.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_09-40-53-746.csv Completed graceful shutdown