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/count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-00a8621 [2018-09-30 10:43:29,661 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:43:29,663 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:43:29,680 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:43:29,680 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:43:29,681 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:43:29,682 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:43:29,684 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:43:29,686 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:43:29,686 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:43:29,687 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 10:43:29,731 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 [2018-09-30 10:43:29,748 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:43:29,749 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:43:29,750 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:43:29,750 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:43:29,751 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:43:29,751 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:43:29,751 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:43:29,752 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:43:29,752 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:43:29,752 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:43:29,752 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:43:29,752 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:43:29,752 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:43:29,753 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:43:29,753 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:43:29,753 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:43:29,753 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:43:29,753 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:43:29,754 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:43:29,754 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:43:29,754 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:43:29,754 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:43:29,754 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:43:29,755 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:43:29,755 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:43:29,755 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:43:29,755 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:43:29,755 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:43:29,756 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:43:29,756 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:43:29,756 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 10:43:29,805 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:43:29,818 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:43:29,822 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:43:29,824 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:43:29,824 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:43:29,825 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-09-30 10:43:29,826 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl' [2018-09-30 10:43:29,875 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:43:29,879 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:43:29,880 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:43:29,880 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:43:29,880 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:43:29,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:43:29" (1/1) ... [2018-09-30 10:43:29,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:43:29" (1/1) ... [2018-09-30 10:43:29,919 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:43:29,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:43:29,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:43:29,920 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:43:29,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:43:29" (1/1) ... [2018-09-30 10:43:29,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:43:29" (1/1) ... [2018-09-30 10:43:29,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:43:29" (1/1) ... [2018-09-30 10:43:29,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:43:29" (1/1) ... [2018-09-30 10:43:29,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:43:29" (1/1) ... [2018-09-30 10:43:29,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:43:29" (1/1) ... [2018-09-30 10:43:29,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:43:29" (1/1) ... [2018-09-30 10:43:29,940 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:43:29,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:43:29,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:43:29,941 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:43:29,942 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:43:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:43:30,017 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-30 10:43:30,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 10:43:30,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 10:43:30,259 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 10:43:30,260 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:43:30 BoogieIcfgContainer [2018-09-30 10:43:30,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:43:30,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:43:30,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:43:30,266 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:43:30,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:43:29" (1/2) ... [2018-09-30 10:43:30,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a8d761 and model type count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:43:30, skipping insertion in model container [2018-09-30 10:43:30,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:43:30" (2/2) ... [2018-09-30 10:43:30,270 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-09-30 10:43:30,280 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:43:30,292 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 10:43:30,336 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:43:30,337 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:43:30,337 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:43:30,337 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:43:30,338 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:43:30,338 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:43:30,338 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:43:30,338 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:43:30,338 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:43:30,354 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 10:43:30,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 10:43:30,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:43:30,362 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 10:43:30,363 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:43:30,371 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:43:30,371 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-09-30 10:43:30,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:43:30,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:43:30,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:30,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:43:30,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:43:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:30,558 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:43:30,558 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 10:43:30,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:43:30,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:43:30,577 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:43:30,579 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 10:43:30,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:43:30,655 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-30 10:43:30,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:43:30,657 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 10:43:30,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:43:30,669 INFO L225 Difference]: With dead ends: 9 [2018-09-30 10:43:30,669 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 10:43:30,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:43:30,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 10:43:30,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 10:43:30,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 10:43:30,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 10:43:30,707 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 10:43:30,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:43:30,708 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 10:43:30,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:43:30,708 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 10:43:30,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 10:43:30,708 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:43:30,709 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 10:43:30,709 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:43:30,709 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:43:30,709 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-09-30 10:43:30,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:43:30,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:43:30,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:30,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:43:30,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:43:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:30,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:43:30,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:43:30,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:43:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:43:30,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:43:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:30,976 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:43:30,977 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2018-09-30 10:43:30,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:43:30,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:43:30,978 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:43:30,978 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-09-30 10:43:31,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:43:31,131 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-30 10:43:31,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:43:31,132 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-30 10:43:31,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:43:31,133 INFO L225 Difference]: With dead ends: 9 [2018-09-30 10:43:31,134 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 10:43:31,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:43:31,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 10:43:31,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 10:43:31,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 10:43:31,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 10:43:31,138 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-30 10:43:31,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:43:31,139 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 10:43:31,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:43:31,139 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 10:43:31,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 10:43:31,140 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:43:31,140 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-30 10:43:31,140 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:43:31,140 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:43:31,141 INFO L82 PathProgramCache]: Analyzing trace with hash 892275272, now seen corresponding path program 2 times [2018-09-30 10:43:31,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:43:31,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:43:31,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:31,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:43:31,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:43:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:31,355 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:43:31,355 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:43:31,372 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:43:31,386 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:43:31,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:43:31,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:43:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:31,621 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:43:31,621 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-09-30 10:43:31,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:43:31,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:43:31,622 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:43:31,622 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-09-30 10:43:32,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:43:32,022 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 10:43:32,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:43:32,023 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-09-30 10:43:32,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:43:32,024 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:43:32,024 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 10:43:32,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:43:32,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 10:43:32,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 10:43:32,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 10:43:32,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 10:43:32,030 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-30 10:43:32,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:43:32,031 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 10:43:32,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:43:32,032 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 10:43:32,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 10:43:32,032 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:43:32,033 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-30 10:43:32,034 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:43:32,034 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:43:32,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1516986008, now seen corresponding path program 3 times [2018-09-30 10:43:32,035 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:43:32,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:43:32,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:32,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:43:32,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:43:32,202 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:32,203 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:43:32,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:43:32,211 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:43:32,220 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 10:43:32,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:43:32,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:43:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:32,356 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:43:32,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-09-30 10:43:32,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:43:32,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:43:32,357 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:43:32,357 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-09-30 10:43:33,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:43:33,065 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-30 10:43:33,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:43:33,066 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-09-30 10:43:33,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:43:33,067 INFO L225 Difference]: With dead ends: 13 [2018-09-30 10:43:33,067 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 10:43:33,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:43:33,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 10:43:33,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 10:43:33,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 10:43:33,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 10:43:33,072 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-30 10:43:33,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:43:33,073 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 10:43:33,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:43:33,073 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 10:43:33,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:43:33,073 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:43:33,074 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-30 10:43:33,074 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:43:33,074 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:43:33,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1829703544, now seen corresponding path program 4 times [2018-09-30 10:43:33,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:43:33,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:43:33,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:33,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:43:33,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:43:33,228 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:33,228 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:43:33,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:43:33,237 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:43:33,251 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:43:33,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:43:33,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:43:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:33,352 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:43:33,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-09-30 10:43:33,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:43:33,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:43:33,353 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:43:33,353 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-09-30 10:43:33,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:43:33,791 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-09-30 10:43:33,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:43:33,793 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-09-30 10:43:33,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:43:33,794 INFO L225 Difference]: With dead ends: 15 [2018-09-30 10:43:33,794 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 10:43:33,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:43:33,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 10:43:33,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 10:43:33,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 10:43:33,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 10:43:33,801 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-30 10:43:33,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:43:33,801 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 10:43:33,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:43:33,801 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 10:43:33,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 10:43:33,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:43:33,802 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-30 10:43:33,802 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:43:33,803 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:43:33,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1703544920, now seen corresponding path program 5 times [2018-09-30 10:43:33,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:43:33,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:43:33,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:33,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:43:33,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:43:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:34,444 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:43:34,444 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:43:34,453 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:43:34,464 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 10:43:34,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:43:34,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:43:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:34,889 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:43:34,889 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-09-30 10:43:34,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:43:34,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:43:34,890 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:43:34,890 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-09-30 10:43:35,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:43:35,309 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-30 10:43:35,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:43:35,310 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-09-30 10:43:35,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:43:35,311 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:43:35,312 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 10:43:35,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:43:35,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 10:43:35,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 10:43:35,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 10:43:35,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 10:43:35,317 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-30 10:43:35,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:43:35,318 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 10:43:35,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:43:35,318 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 10:43:35,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:43:35,319 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:43:35,319 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-30 10:43:35,319 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:43:35,319 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:43:35,320 INFO L82 PathProgramCache]: Analyzing trace with hash -724191544, now seen corresponding path program 6 times [2018-09-30 10:43:35,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:43:35,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:43:35,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:35,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:43:35,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:43:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:35,980 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:43:35,980 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:43:35,989 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:43:36,000 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:43:36,000 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:43:36,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:43:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:36,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:43:36,154 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-09-30 10:43:36,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:43:36,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:43:36,155 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:43:36,155 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-09-30 10:43:36,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:43:36,794 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-09-30 10:43:36,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 10:43:36,795 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-30 10:43:36,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:43:36,796 INFO L225 Difference]: With dead ends: 19 [2018-09-30 10:43:36,796 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 10:43:36,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:43:36,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 10:43:36,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 10:43:36,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 10:43:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 10:43:36,802 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-30 10:43:36,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:43:36,802 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 10:43:36,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:43:36,802 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 10:43:36,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 10:43:36,803 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:43:36,803 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-30 10:43:36,803 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:43:36,803 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:43:36,803 INFO L82 PathProgramCache]: Analyzing trace with hash -163435032, now seen corresponding path program 7 times [2018-09-30 10:43:36,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:43:36,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:43:36,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:36,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:43:36,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:43:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:37,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:43:37,134 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:43:37,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:43:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:43:37,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:43:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:37,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:43:37,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-09-30 10:43:37,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:43:37,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:43:37,435 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:43:37,435 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-09-30 10:43:38,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:43:38,502 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-30 10:43:38,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:43:38,503 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-09-30 10:43:38,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:43:38,503 INFO L225 Difference]: With dead ends: 21 [2018-09-30 10:43:38,504 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 10:43:38,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:43:38,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 10:43:38,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 10:43:38,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 10:43:38,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 10:43:38,510 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-30 10:43:38,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:43:38,510 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 10:43:38,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:43:38,511 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 10:43:38,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:43:38,511 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:43:38,511 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-30 10:43:38,511 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:43:38,512 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:43:38,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1852661000, now seen corresponding path program 8 times [2018-09-30 10:43:38,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:43:38,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:43:38,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:38,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:43:38,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:43:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:38,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:43:38,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:43:38,911 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:43:38,932 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:43:38,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:43:38,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:43:39,069 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:39,089 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:43:39,089 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-09-30 10:43:39,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 10:43:39,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 10:43:39,090 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:43:39,090 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-09-30 10:43:40,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:43:40,213 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-09-30 10:43:40,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 10:43:40,214 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-09-30 10:43:40,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:43:40,215 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:43:40,215 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 10:43:40,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:43:40,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 10:43:40,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 10:43:40,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 10:43:40,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 10:43:40,221 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-30 10:43:40,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:43:40,221 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 10:43:40,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 10:43:40,221 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 10:43:40,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 10:43:40,222 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:43:40,222 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-30 10:43:40,222 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:43:40,223 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:43:40,223 INFO L82 PathProgramCache]: Analyzing trace with hash -2004270040, now seen corresponding path program 9 times [2018-09-30 10:43:40,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:43:40,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:43:40,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:40,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:43:40,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:43:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:40,919 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:43:40,919 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:43:40,928 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:43:40,944 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 10:43:40,944 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:43:40,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:43:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:41,241 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:43:41,242 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-09-30 10:43:41,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 10:43:41,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 10:43:41,242 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:43:41,243 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-09-30 10:43:42,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:43:42,144 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-30 10:43:42,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:43:42,146 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-09-30 10:43:42,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:43:42,147 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:43:42,147 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:43:42,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:43:42,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:43:42,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 10:43:42,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 10:43:42,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 10:43:42,154 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-30 10:43:42,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:43:42,155 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 10:43:42,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 10:43:42,155 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 10:43:42,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 10:43:42,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:43:42,156 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-30 10:43:42,156 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:43:42,156 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:43:42,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1958223032, now seen corresponding path program 10 times [2018-09-30 10:43:42,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:43:42,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:43:42,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:42,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:43:42,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:43:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:42,613 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:43:42,613 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:43:42,621 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:43:42,657 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:43:42,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:43:42,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:43:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:42,842 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:43:42,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-09-30 10:43:42,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 10:43:42,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 10:43:42,843 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:43:42,843 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-09-30 10:43:44,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:43:44,026 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-09-30 10:43:44,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:43:44,027 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-09-30 10:43:44,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:43:44,028 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:43:44,028 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:43:44,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:43:44,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:43:44,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 10:43:44,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 10:43:44,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 10:43:44,039 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-30 10:43:44,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:43:44,039 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 10:43:44,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 10:43:44,040 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 10:43:44,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 10:43:44,040 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:43:44,040 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-30 10:43:44,041 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:43:44,041 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:43:44,041 INFO L82 PathProgramCache]: Analyzing trace with hash -656721304, now seen corresponding path program 11 times [2018-09-30 10:43:44,041 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:43:44,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:43:44,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:44,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:43:44,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:43:44,842 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:44,842 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:43:44,842 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:43:44,851 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:43:44,880 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 10:43:44,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:43:44,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:43:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:45,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:43:45,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-09-30 10:43:45,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 10:43:45,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 10:43:45,027 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:43:45,027 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-09-30 10:43:46,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:43:46,768 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-30 10:43:46,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:43:46,769 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-09-30 10:43:46,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:43:46,770 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:43:46,770 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:43:46,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:43:46,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:43:46,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 10:43:46,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 10:43:46,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 10:43:46,776 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-30 10:43:46,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:43:46,777 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 10:43:46,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 10:43:46,777 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 10:43:46,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 10:43:46,778 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:43:46,778 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-30 10:43:46,778 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:43:46,778 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:43:46,779 INFO L82 PathProgramCache]: Analyzing trace with hash 250956168, now seen corresponding path program 12 times [2018-09-30 10:43:46,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:43:46,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:43:46,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:46,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:43:46,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:43:47,284 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:47,285 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:43:47,285 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:43:47,294 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:43:47,454 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 10:43:47,455 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:43:47,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:43:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:47,940 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:43:47,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-09-30 10:43:47,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 10:43:47,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 10:43:47,941 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:43:47,941 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-09-30 10:43:49,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:43:49,285 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-09-30 10:43:49,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:43:49,286 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-09-30 10:43:49,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:43:49,287 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:43:49,287 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:43:49,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:43:49,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:43:49,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 10:43:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 10:43:49,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 10:43:49,294 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-30 10:43:49,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:43:49,294 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 10:43:49,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 10:43:49,294 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 10:43:49,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 10:43:49,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:43:49,295 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-30 10:43:49,295 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:43:49,296 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:43:49,296 INFO L82 PathProgramCache]: Analyzing trace with hash 650645672, now seen corresponding path program 13 times [2018-09-30 10:43:49,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:43:49,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:43:49,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:49,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:43:49,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:49,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:43:49,836 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:49,836 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:43:49,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:43:49,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:43:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:43:49,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:43:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:50,054 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:43:50,055 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-09-30 10:43:50,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 10:43:50,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 10:43:50,055 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:43:50,056 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-09-30 10:43:51,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:43:51,851 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-30 10:43:51,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:43:51,851 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-09-30 10:43:51,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:43:51,852 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:43:51,852 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:43:51,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:43:51,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:43:51,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 10:43:51,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 10:43:51,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 10:43:51,858 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-30 10:43:51,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:43:51,858 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 10:43:51,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 10:43:51,859 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 10:43:51,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 10:43:51,859 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:43:51,859 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-30 10:43:51,860 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:43:51,860 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:43:51,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1794797624, now seen corresponding path program 14 times [2018-09-30 10:43:51,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:43:51,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:43:51,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:51,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:43:51,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:43:52,512 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:52,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:43:52,512 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:43:52,520 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:43:52,565 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:43:52,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:43:52,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:43:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:52,750 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:43:52,751 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-09-30 10:43:52,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 10:43:52,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 10:43:52,751 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:43:52,751 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-09-30 10:43:54,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:43:54,466 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-09-30 10:43:54,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:43:54,466 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-09-30 10:43:54,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:43:54,467 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:43:54,467 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:43:54,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:43:54,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:43:54,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 10:43:54,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 10:43:54,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 10:43:54,475 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-30 10:43:54,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:43:54,475 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 10:43:54,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 10:43:54,476 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 10:43:54,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 10:43:54,476 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:43:54,476 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-30 10:43:54,477 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:43:54,477 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:43:54,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1776273128, now seen corresponding path program 15 times [2018-09-30 10:43:54,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:43:54,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:43:54,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:54,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:43:54,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:43:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:55,207 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:43:55,207 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:43:55,216 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:43:55,242 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 10:43:55,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:43:55,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:43:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:55,408 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:43:55,408 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-09-30 10:43:55,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 10:43:55,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 10:43:55,409 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:43:55,409 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-09-30 10:43:57,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:43:57,570 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-30 10:43:57,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 10:43:57,571 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-09-30 10:43:57,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:43:57,571 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:43:57,572 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:43:57,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:43:57,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:43:57,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 10:43:57,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 10:43:57,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 10:43:57,582 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-30 10:43:57,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:43:57,582 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 10:43:57,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 10:43:57,582 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 10:43:57,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 10:43:57,583 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:43:57,583 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-30 10:43:57,583 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:43:57,584 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:43:57,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1896396296, now seen corresponding path program 16 times [2018-09-30 10:43:57,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:43:57,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:43:57,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:57,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:43:57,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:43:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:43:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:58,580 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:43:58,580 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:43:58,587 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:43:58,648 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:43:58,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:43:58,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:43:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:43:58,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:43:58,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-09-30 10:43:58,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 10:43:58,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 10:43:58,852 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:43:58,852 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-09-30 10:44:01,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:44:01,147 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-09-30 10:44:01,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:44:01,147 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-09-30 10:44:01,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:44:01,148 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:44:01,148 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:44:01,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:44:01,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:44:01,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 10:44:01,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 10:44:01,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 10:44:01,156 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-30 10:44:01,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:44:01,157 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 10:44:01,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 10:44:01,157 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 10:44:01,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 10:44:01,157 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:44:01,158 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-30 10:44:01,158 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:44:01,158 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:44:01,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1370643752, now seen corresponding path program 17 times [2018-09-30 10:44:01,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:44:01,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:44:01,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:44:01,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:44:01,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:44:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:44:02,559 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:44:02,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:44:02,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:44:02,566 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:44:02,626 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 10:44:02,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:44:02,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:44:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:44:02,788 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:44:02,789 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-09-30 10:44:02,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 10:44:02,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 10:44:02,789 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:44:02,789 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-09-30 10:44:05,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:44:05,227 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-30 10:44:05,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 10:44:05,228 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-09-30 10:44:05,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:44:05,229 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:44:05,229 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:44:05,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:44:05,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:44:05,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 10:44:05,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 10:44:05,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 10:44:05,238 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-30 10:44:05,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:44:05,238 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 10:44:05,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 10:44:05,238 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 10:44:05,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 10:44:05,239 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:44:05,239 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-30 10:44:05,239 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:44:05,239 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:44:05,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1366377400, now seen corresponding path program 18 times [2018-09-30 10:44:05,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:44:05,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:44:05,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:44:05,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:44:05,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:44:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:44:06,168 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:44:06,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:44:06,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:44:06,176 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:44:06,199 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 10:44:06,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:44:06,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:44:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:44:06,436 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:44:06,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-09-30 10:44:06,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 10:44:06,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 10:44:06,437 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:44:06,437 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-09-30 10:44:08,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:44:08,940 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-09-30 10:44:08,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:44:08,941 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-09-30 10:44:08,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:44:08,941 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:44:08,942 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:44:08,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:44:08,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:44:08,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 10:44:08,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 10:44:08,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 10:44:08,951 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-30 10:44:08,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:44:08,952 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 10:44:08,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 10:44:08,952 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 10:44:08,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 10:44:08,952 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:44:08,952 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-30 10:44:08,953 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:44:08,953 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:44:08,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1171247976, now seen corresponding path program 19 times [2018-09-30 10:44:08,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:44:08,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:44:08,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:44:08,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:44:08,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:44:09,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:44:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:44:10,915 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:44:10,915 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:44:10,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:44:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:44:11,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:44:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:44:11,225 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:44:11,225 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-09-30 10:44:11,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 10:44:11,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 10:44:11,226 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:44:11,226 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-09-30 10:44:14,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:44:14,676 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-30 10:44:14,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 10:44:14,677 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-09-30 10:44:14,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:44:14,677 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:44:14,677 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:44:14,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:44:14,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:44:14,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 10:44:14,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 10:44:14,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 10:44:14,687 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-30 10:44:14,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:44:14,687 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 10:44:14,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 10:44:14,687 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 10:44:14,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 10:44:14,688 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:44:14,688 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-30 10:44:14,688 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:44:14,688 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:44:14,689 INFO L82 PathProgramCache]: Analyzing trace with hash 287810184, now seen corresponding path program 20 times [2018-09-30 10:44:14,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:44:14,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:44:14,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:44:14,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:44:14,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:44:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:44:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:44:15,870 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:44:15,870 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:44:15,878 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:44:15,980 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:44:15,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:44:16,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:44:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:44:16,249 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:44:16,250 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-09-30 10:44:16,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 10:44:16,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 10:44:16,250 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:44:16,250 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-09-30 10:44:19,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:44:19,760 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-09-30 10:44:19,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 10:44:19,760 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-09-30 10:44:19,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:44:19,761 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:44:19,761 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:44:19,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:44:19,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:44:19,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 10:44:19,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 10:44:19,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 10:44:19,772 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-30 10:44:19,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:44:19,772 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 10:44:19,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 10:44:19,772 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 10:44:19,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 10:44:19,773 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:44:19,773 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-30 10:44:19,773 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:44:19,774 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:44:19,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1707616680, now seen corresponding path program 21 times [2018-09-30 10:44:19,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:44:19,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:44:19,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:44:19,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:44:19,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:44:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:44:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:44:21,050 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:44:21,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:44:21,064 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:44:21,092 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 10:44:21,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:44:21,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:44:21,237 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:44:21,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:44:21,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-09-30 10:44:21,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 10:44:21,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 10:44:21,258 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:44:21,259 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-09-30 10:44:25,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:44:25,056 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-30 10:44:25,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 10:44:25,058 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-09-30 10:44:25,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:44:25,059 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:44:25,059 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:44:25,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:44:25,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:44:25,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 10:44:25,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 10:44:25,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 10:44:25,069 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-30 10:44:25,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:44:25,070 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 10:44:25,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 10:44:25,070 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 10:44:25,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 10:44:25,070 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:44:25,071 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-30 10:44:25,071 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:44:25,071 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:44:25,071 INFO L82 PathProgramCache]: Analyzing trace with hash 342059208, now seen corresponding path program 22 times [2018-09-30 10:44:25,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:44:25,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:44:25,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:44:25,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:44:25,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:44:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:44:26,435 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:44:26,436 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:44:26,436 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:44:26,444 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:44:26,575 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:44:26,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:44:26,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:44:26,816 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:44:26,836 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:44:26,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-09-30 10:44:26,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 10:44:26,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 10:44:26,837 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:44:26,837 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-09-30 10:44:30,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:44:30,960 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-09-30 10:44:30,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:44:30,960 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-09-30 10:44:30,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:44:30,960 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:44:30,961 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:44:30,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:44:30,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:44:30,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 10:44:30,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 10:44:30,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 10:44:30,969 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-30 10:44:30,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:44:30,969 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 10:44:30,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 10:44:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 10:44:30,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 10:44:30,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:44:30,970 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-30 10:44:30,970 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:44:30,970 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:44:30,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1993646104, now seen corresponding path program 23 times [2018-09-30 10:44:30,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:44:30,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:44:30,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:44:30,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:44:30,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:44:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:44:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:44:32,799 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:44:32,799 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:44:32,807 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:44:32,936 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 10:44:32,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:44:32,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:44:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:44:33,604 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:44:33,604 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-09-30 10:44:33,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 10:44:33,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 10:44:33,605 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:44:33,605 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-09-30 10:44:38,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:44:38,165 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-30 10:44:38,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:44:38,165 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-09-30 10:44:38,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:44:38,166 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:44:38,166 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:44:38,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:44:38,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:44:38,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 10:44:38,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 10:44:38,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 10:44:38,178 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-30 10:44:38,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:44:38,178 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 10:44:38,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 10:44:38,178 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 10:44:38,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 10:44:38,179 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:44:38,179 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-30 10:44:38,179 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:44:38,179 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:44:38,179 INFO L82 PathProgramCache]: Analyzing trace with hash -338555128, now seen corresponding path program 24 times [2018-09-30 10:44:38,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:44:38,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:44:38,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:44:38,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:44:38,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:44:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:44:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:44:39,897 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:44:39,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:44:39,905 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:44:39,955 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 10:44:39,956 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:44:39,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:44:40,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:44:40,271 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:44:40,272 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-09-30 10:44:40,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 10:44:40,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 10:44:40,272 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:44:40,272 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-09-30 10:44:45,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:44:45,418 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-09-30 10:44:45,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 10:44:45,419 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-09-30 10:44:45,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:44:45,419 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:44:45,419 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:44:45,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:44:45,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:44:45,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 10:44:45,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 10:44:45,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 10:44:45,429 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-30 10:44:45,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:44:45,430 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 10:44:45,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 10:44:45,430 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 10:44:45,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 10:44:45,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:44:45,430 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-30 10:44:45,430 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:44:45,431 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:44:45,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1065973288, now seen corresponding path program 25 times [2018-09-30 10:44:45,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:44:45,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:44:45,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:44:45,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:44:45,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:44:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:44:47,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:44:47,170 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:44:47,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:44:47,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:44:47,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:44:47,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:44:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:44:47,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:44:47,682 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2018-09-30 10:44:47,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 10:44:47,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 10:44:47,683 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:44:47,683 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-09-30 10:44:52,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:44:52,941 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-30 10:44:52,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 10:44:52,941 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-09-30 10:44:52,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:44:52,942 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:44:52,942 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:44:52,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:44:52,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:44:52,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 10:44:52,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 10:44:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 10:44:52,953 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-30 10:44:52,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:44:52,954 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 10:44:52,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 10:44:52,954 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 10:44:52,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 10:44:52,954 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:44:52,955 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-30 10:44:52,955 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:44:52,955 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:44:52,955 INFO L82 PathProgramCache]: Analyzing trace with hash -2096917176, now seen corresponding path program 26 times [2018-09-30 10:44:52,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:44:52,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:44:52,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:44:52,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:44:52,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:44:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:44:54,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:44:54,885 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:44:54,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:44:54,892 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:44:55,097 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:44:55,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:44:55,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:44:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:44:55,561 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:44:55,561 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2018-09-30 10:44:55,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 10:44:55,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 10:44:55,562 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:44:55,562 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-09-30 10:45:01,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:45:01,668 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-09-30 10:45:01,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:45:01,668 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-09-30 10:45:01,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:45:01,669 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:45:01,669 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:45:01,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:45:01,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:45:01,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 10:45:01,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 10:45:01,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 10:45:01,680 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-30 10:45:01,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:45:01,680 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 10:45:01,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 10:45:01,680 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 10:45:01,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 10:45:01,681 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:45:01,681 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-30 10:45:01,681 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:45:01,682 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:45:01,682 INFO L82 PathProgramCache]: Analyzing trace with hash -797807512, now seen corresponding path program 27 times [2018-09-30 10:45:01,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:45:01,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:45:01,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:45:01,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:45:01,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:45:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:45:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:45:03,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:45:03,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:45:03,741 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:45:03,776 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 10:45:03,776 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:45:03,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:45:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:45:04,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:45:04,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2018-09-30 10:45:04,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 10:45:04,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 10:45:04,028 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:45:04,028 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-09-30 10:45:10,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:45:10,369 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-30 10:45:10,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 10:45:10,369 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-09-30 10:45:10,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:45:10,370 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:45:10,370 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:45:10,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:45:10,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:45:10,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 10:45:10,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 10:45:10,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 10:45:10,380 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-30 10:45:10,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:45:10,380 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 10:45:10,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 10:45:10,380 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 10:45:10,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 10:45:10,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:45:10,381 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-30 10:45:10,381 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:45:10,381 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:45:10,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2106063752, now seen corresponding path program 28 times [2018-09-30 10:45:10,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:45:10,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:45:10,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:45:10,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:45:10,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:45:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:45:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:45:12,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:45:12,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:45:12,743 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:45:12,989 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:45:12,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:45:13,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:45:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:45:13,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:45:13,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2018-09-30 10:45:13,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 10:45:13,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 10:45:13,384 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:45:13,384 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-09-30 10:45:20,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:45:20,509 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-09-30 10:45:20,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 10:45:20,509 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-09-30 10:45:20,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:45:20,510 INFO L225 Difference]: With dead ends: 63 [2018-09-30 10:45:20,510 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 10:45:20,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:45:20,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 10:45:20,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 10:45:20,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 10:45:20,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 10:45:20,523 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-30 10:45:20,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:45:20,523 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 10:45:20,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 10:45:20,523 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 10:45:20,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 10:45:20,524 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:45:20,524 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-30 10:45:20,524 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:45:20,524 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:45:20,525 INFO L82 PathProgramCache]: Analyzing trace with hash 997606056, now seen corresponding path program 29 times [2018-09-30 10:45:20,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:45:20,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:45:20,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:45:20,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:45:20,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:45:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:45:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:45:23,100 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:45:23,100 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:45:23,107 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:45:23,334 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 10:45:23,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:45:23,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:45:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:45:23,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:45:23,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2018-09-30 10:45:23,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 10:45:23,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 10:45:23,618 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:45:23,618 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-09-30 10:45:31,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:45:31,759 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-30 10:45:31,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 10:45:31,760 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-09-30 10:45:31,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:45:31,760 INFO L225 Difference]: With dead ends: 65 [2018-09-30 10:45:31,760 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 10:45:31,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:45:31,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 10:45:31,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 10:45:31,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 10:45:31,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 10:45:31,772 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-30 10:45:31,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:45:31,772 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 10:45:31,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 10:45:31,772 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 10:45:31,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 10:45:31,772 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:45:31,773 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-30 10:45:31,773 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:45:31,773 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:45:31,773 INFO L82 PathProgramCache]: Analyzing trace with hash 921649608, now seen corresponding path program 30 times [2018-09-30 10:45:31,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:45:31,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:45:31,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:45:31,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:45:31,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:45:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:45:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:45:34,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:45:34,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:45:34,280 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:45:34,327 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 10:45:34,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:45:34,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:45:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:45:34,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:45:34,580 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2018-09-30 10:45:34,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 10:45:34,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 10:45:34,581 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:45:34,581 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-09-30 10:45:42,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:45:42,374 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-09-30 10:45:42,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 10:45:42,374 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-09-30 10:45:42,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:45:42,375 INFO L225 Difference]: With dead ends: 67 [2018-09-30 10:45:42,375 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 10:45:42,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:45:42,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 10:45:42,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 10:45:42,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 10:45:42,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 10:45:42,385 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-09-30 10:45:42,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:45:42,385 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 10:45:42,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 10:45:42,385 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 10:45:42,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 10:45:42,385 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:45:42,386 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-30 10:45:42,386 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:45:42,386 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:45:42,386 INFO L82 PathProgramCache]: Analyzing trace with hash 941947112, now seen corresponding path program 31 times [2018-09-30 10:45:42,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:45:42,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:45:42,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:45:42,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:45:42,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:45:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:45:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:45:45,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:45:45,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:45:45,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:45:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:45:45,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:45:45,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:45:45,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:45:45,797 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2018-09-30 10:45:45,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 10:45:45,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 10:45:45,798 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:45:45,798 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-09-30 10:45:54,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:45:54,801 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-30 10:45:54,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 10:45:54,801 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-09-30 10:45:54,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:45:54,802 INFO L225 Difference]: With dead ends: 69 [2018-09-30 10:45:54,802 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 10:45:54,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:45:54,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 10:45:54,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 10:45:54,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 10:45:54,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 10:45:54,816 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-09-30 10:45:54,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:45:54,816 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 10:45:54,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 10:45:54,816 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 10:45:54,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 10:45:54,817 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:45:54,817 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-30 10:45:54,817 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:45:54,817 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:45:54,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1026988024, now seen corresponding path program 32 times [2018-09-30 10:45:54,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:45:54,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:45:54,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:45:54,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:45:54,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:45:55,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:45:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:45:57,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:45:57,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:45:57,820 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:45:58,190 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:45:58,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:45:58,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:45:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:45:58,871 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:45:58,871 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2018-09-30 10:45:58,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 10:45:58,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 10:45:58,872 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:45:58,872 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-09-30 10:46:08,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:46:08,486 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2018-09-30 10:46:08,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 10:46:08,487 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-09-30 10:46:08,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:46:08,487 INFO L225 Difference]: With dead ends: 71 [2018-09-30 10:46:08,487 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 10:46:08,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:46:08,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 10:46:08,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 10:46:08,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 10:46:08,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 10:46:08,499 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-09-30 10:46:08,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:46:08,500 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 10:46:08,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 10:46:08,500 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 10:46:08,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 10:46:08,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:46:08,501 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-30 10:46:08,501 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:46:08,501 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:46:08,501 INFO L82 PathProgramCache]: Analyzing trace with hash 906923816, now seen corresponding path program 33 times [2018-09-30 10:46:08,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:46:08,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:46:08,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:08,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:46:08,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:46:11,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:11,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:46:11,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:46:11,631 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:46:11,675 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 10:46:11,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:46:11,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:46:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:11,942 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:46:11,942 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2018-09-30 10:46:11,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 10:46:11,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 10:46:11,943 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:46:11,943 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-09-30 10:46:22,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:46:22,748 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-30 10:46:22,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 10:46:22,748 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-09-30 10:46:22,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:46:22,749 INFO L225 Difference]: With dead ends: 73 [2018-09-30 10:46:22,749 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 10:46:22,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:46:22,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 10:46:22,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 10:46:22,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 10:46:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 10:46:22,763 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-09-30 10:46:22,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:46:22,763 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 10:46:22,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 10:46:22,763 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 10:46:22,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 10:46:22,764 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:46:22,764 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-30 10:46:22,764 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:46:22,764 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:46:22,765 INFO L82 PathProgramCache]: Analyzing trace with hash -324637112, now seen corresponding path program 34 times [2018-09-30 10:46:22,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:46:22,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:46:22,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:22,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:46:22,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:23,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:46:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:26,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:46:26,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:46:26,049 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:46:26,492 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:46:26,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:46:26,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:46:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:27,014 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:46:27,015 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2018-09-30 10:46:27,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 10:46:27,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 10:46:27,015 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:46:27,015 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-09-30 10:46:37,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:46:37,999 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-09-30 10:46:37,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 10:46:37,999 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-09-30 10:46:37,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:46:38,000 INFO L225 Difference]: With dead ends: 75 [2018-09-30 10:46:38,000 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 10:46:38,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:46:38,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 10:46:38,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 10:46:38,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 10:46:38,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 10:46:38,016 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-09-30 10:46:38,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:46:38,016 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 10:46:38,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 10:46:38,016 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 10:46:38,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 10:46:38,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:46:38,017 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-30 10:46:38,017 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:46:38,017 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:46:38,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1556284776, now seen corresponding path program 35 times [2018-09-30 10:46:38,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:46:38,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:46:38,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:38,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:46:38,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:46:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:41,430 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:46:41,430 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:46:41,446 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:46:41,857 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 10:46:41,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:46:41,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:46:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:42,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:46:42,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2018-09-30 10:46:42,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 10:46:42,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 10:46:42,187 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:46:42,187 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-09-30 10:46:54,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:46:54,018 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-30 10:46:54,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 10:46:54,018 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-09-30 10:46:54,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:46:54,019 INFO L225 Difference]: With dead ends: 77 [2018-09-30 10:46:54,019 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 10:46:54,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:46:54,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 10:46:54,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 10:46:54,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 10:46:54,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 10:46:54,037 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-09-30 10:46:54,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:46:54,037 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 10:46:54,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 10:46:54,038 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 10:46:54,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 10:46:54,038 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:46:54,038 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-30 10:46:54,038 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:46:54,039 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:46:54,039 INFO L82 PathProgramCache]: Analyzing trace with hash 940987528, now seen corresponding path program 36 times [2018-09-30 10:46:54,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:46:54,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:46:54,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:54,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:46:54,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:46:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:58,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:46:58,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:46:58,020 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:46:58,091 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 10:46:58,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:46:58,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:46:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:58,539 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:46:58,539 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2018-09-30 10:46:58,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 10:46:58,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 10:46:58,540 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:46:58,540 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-09-30 10:47:11,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:11,477 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-09-30 10:47:11,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 10:47:11,477 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-09-30 10:47:11,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:11,478 INFO L225 Difference]: With dead ends: 79 [2018-09-30 10:47:11,478 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 10:47:11,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:11,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 10:47:11,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 10:47:11,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 10:47:11,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 10:47:11,497 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-09-30 10:47:11,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:11,497 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 10:47:11,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 10:47:11,497 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 10:47:11,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 10:47:11,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:11,498 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-30 10:47:11,498 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:11,498 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:11,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1949148248, now seen corresponding path program 37 times [2018-09-30 10:47:11,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:11,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:11,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:11,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:11,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:11,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:15,570 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:15,570 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:15,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:16,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:16,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:16,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2018-09-30 10:47:16,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 10:47:16,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 10:47:16,763 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:16,763 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-09-30 10:47:30,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:30,331 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-30 10:47:30,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 10:47:30,331 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-09-30 10:47:30,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:30,332 INFO L225 Difference]: With dead ends: 81 [2018-09-30 10:47:30,332 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 10:47:30,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:30,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 10:47:30,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 10:47:30,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 10:47:30,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 10:47:30,348 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-09-30 10:47:30,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:30,348 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 10:47:30,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 10:47:30,348 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 10:47:30,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 10:47:30,349 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:30,349 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-30 10:47:30,349 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:30,349 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:30,349 INFO L82 PathProgramCache]: Analyzing trace with hash -525788472, now seen corresponding path program 38 times [2018-09-30 10:47:30,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:30,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:30,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:30,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:30,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:34,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:34,743 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:34,751 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:47:35,336 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:47:35,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:35,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:36,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:36,112 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:36,112 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2018-09-30 10:47:36,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 10:47:36,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 10:47:36,113 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:36,113 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-09-30 10:47:50,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:50,775 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2018-09-30 10:47:50,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 10:47:50,775 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-09-30 10:47:50,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:50,776 INFO L225 Difference]: With dead ends: 83 [2018-09-30 10:47:50,776 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 10:47:50,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:50,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 10:47:50,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 10:47:50,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 10:47:50,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 10:47:50,794 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-09-30 10:47:50,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:50,795 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 10:47:50,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 10:47:50,795 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 10:47:50,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 10:47:50,795 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:50,795 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-30 10:47:50,796 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:50,796 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:50,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1523356136, now seen corresponding path program 39 times [2018-09-30 10:47:50,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:50,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:50,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:50,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:50,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-30 10:47:51,450 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 10:47:51,455 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 10:47:51,455 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 10:47:51 BoogieIcfgContainer [2018-09-30 10:47:51,455 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 10:47:51,458 INFO L168 Benchmark]: Toolchain (without parser) took 261582.27 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -240.6 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 409.6 MB). Peak memory consumption was 168.9 MB. Max. memory is 7.1 GB. [2018-09-30 10:47:51,461 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.28 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:47:51,461 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.59 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:47:51,462 INFO L168 Benchmark]: Boogie Preprocessor took 20.40 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:47:51,462 INFO L168 Benchmark]: RCFGBuilder took 319.57 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 10:47:51,463 INFO L168 Benchmark]: TraceAbstraction took 261192.66 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -240.6 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 388.4 MB). Peak memory consumption was 147.8 MB. Max. memory is 7.1 GB. [2018-09-30 10:47:51,469 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 0.28 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 39.59 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.40 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 319.57 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 261192.66 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -240.6 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 388.4 MB). Peak memory consumption was 147.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 39]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 39). Cancelled while BasicCegarLoop was analyzing trace of length 81 with TraceHistMax 77, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 79 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 261.1s OverallTime, 40 OverallIterations, 77 TraceHistogramMax, 181.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 117 SDtfs, 0 SDslu, 1506 SDs, 0 SdLazy, 3203 SolverSat, 1444 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4485 GetRequests, 1521 SyntacticMatches, 0 SemanticMatches, 2964 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 39 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 8.8s SatisfiabilityAnalysisTime, 67.4s InterpolantComputationTime, 3119 NumberOfCodeBlocks, 3119 NumberOfCodeBlocksAsserted, 444 NumberOfCheckSat, 3042 ConstructedInterpolants, 0 QuantifiedInterpolants, 781694 SizeOfPredicates, 76 NumberOfNonLiveVariables, 4978 ConjunctsInSsa, 1584 ConjunctsInUnsatCore, 77 InterpolantComputations, 1 PerfectInterpolantSequences, 0/74594 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_10-47-51-496.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_10-47-51-496.csv Completed graceful shutdown