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/const1.i_3.bplTransformedIcfg_BEv2_6.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b2fde6a [2018-09-28 10:24:42,732 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 10:24:42,734 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 10:24:42,745 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 10:24:42,746 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 10:24:42,747 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 10:24:42,748 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 10:24:42,750 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 10:24:42,752 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 10:24:42,753 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 10:24:42,754 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-28 10:24:42,778 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 [2018-09-28 10:24:42,793 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 10:24:42,793 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 10:24:42,794 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 10:24:42,795 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 10:24:42,795 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 10:24:42,795 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 10:24:42,796 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 10:24:42,796 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 10:24:42,796 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 10:24:42,796 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 10:24:42,796 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 10:24:42,797 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 10:24:42,797 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 10:24:42,797 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 10:24:42,797 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 10:24:42,797 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 10:24:42,798 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 10:24:42,798 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 10:24:42,798 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 10:24:42,798 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 10:24:42,798 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 10:24:42,799 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 10:24:42,799 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:24:42,799 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 10:24:42,799 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 10:24:42,799 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 10:24:42,800 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 10:24:42,800 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 10:24:42,800 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 10:24:42,800 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 10:24:42,800 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-28 10:24:42,865 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 10:24:42,884 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 10:24:42,889 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 10:24:42,890 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 10:24:42,891 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 10:24:42,892 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/const1.i_3.bplTransformedIcfg_BEv2_6.bpl [2018-09-28 10:24:42,892 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/const1.i_3.bplTransformedIcfg_BEv2_6.bpl' [2018-09-28 10:24:42,952 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 10:24:42,956 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 10:24:42,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 10:24:42,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 10:24:42,957 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 10:24:42,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:24:42" (1/1) ... [2018-09-28 10:24:42,993 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:24:42" (1/1) ... [2018-09-28 10:24:43,000 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 10:24:43,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 10:24:43,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 10:24:43,001 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 10:24:43,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:24:42" (1/1) ... [2018-09-28 10:24:43,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:24:42" (1/1) ... [2018-09-28 10:24:43,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:24:42" (1/1) ... [2018-09-28 10:24:43,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:24:42" (1/1) ... [2018-09-28 10:24:43,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:24:42" (1/1) ... [2018-09-28 10:24:43,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:24:42" (1/1) ... [2018-09-28 10:24:43,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:24:42" (1/1) ... [2018-09-28 10:24:43,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 10:24:43,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 10:24:43,018 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 10:24:43,019 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 10:24:43,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:24:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:24:43,092 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-28 10:24:43,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-28 10:24:43,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-28 10:24:43,289 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-28 10:24:43,291 INFO L202 PluginConnector]: Adding new model const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:24:43 BoogieIcfgContainer [2018-09-28 10:24:43,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 10:24:43,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 10:24:43,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 10:24:43,298 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 10:24:43,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:24:42" (1/2) ... [2018-09-28 10:24:43,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5375c64c and model type const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 10:24:43, skipping insertion in model container [2018-09-28 10:24:43,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:24:43" (2/2) ... [2018-09-28 10:24:43,302 INFO L112 eAbstractionObserver]: Analyzing ICFG const1.i_3.bplTransformedIcfg_BEv2_6.bpl [2018-09-28 10:24:43,314 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 10:24:43,322 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-28 10:24:43,382 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 10:24:43,383 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 10:24:43,383 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 10:24:43,384 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 10:24:43,384 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 10:24:43,384 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 10:24:43,384 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 10:24:43,384 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 10:24:43,385 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 10:24:43,399 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-28 10:24:43,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-28 10:24:43,405 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:43,406 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-28 10:24:43,408 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:43,417 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:43,417 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-09-28 10:24:43,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:43,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:43,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:43,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:24:43,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:43,559 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:24:43,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-28 10:24:43,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 10:24:43,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 10:24:43,577 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:43,579 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-28 10:24:43,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:43,660 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-28 10:24:43,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 10:24:43,661 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-28 10:24:43,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:43,671 INFO L225 Difference]: With dead ends: 9 [2018-09-28 10:24:43,671 INFO L226 Difference]: Without dead ends: 5 [2018-09-28 10:24:43,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:43,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-28 10:24:43,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-28 10:24:43,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-28 10:24:43,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-28 10:24:43,711 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-28 10:24:43,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:43,711 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-28 10:24:43,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 10:24:43,711 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-28 10:24:43,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-28 10:24:43,712 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:43,712 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-28 10:24:43,713 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:43,713 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:43,713 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2018-09-28 10:24:43,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:43,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:43,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:43,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:24:43,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:43,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:43,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-28 10:24:43,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:43,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:43,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:44,000 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:44,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-28 10:24:44,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-28 10:24:44,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-28 10:24:44,001 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:44,001 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-28 10:24:44,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:44,171 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-28 10:24:44,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:24:44,172 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-28 10:24:44,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:44,173 INFO L225 Difference]: With dead ends: 8 [2018-09-28 10:24:44,173 INFO L226 Difference]: Without dead ends: 6 [2018-09-28 10:24:44,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:44,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-28 10:24:44,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-28 10:24:44,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-28 10:24:44,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-28 10:24:44,176 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-28 10:24:44,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:44,176 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-28 10:24:44,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-28 10:24:44,177 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-28 10:24:44,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-28 10:24:44,177 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:44,177 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-28 10:24:44,178 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:44,178 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:44,178 INFO L82 PathProgramCache]: Analyzing trace with hash 28844579, now seen corresponding path program 2 times [2018-09-28 10:24:44,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:44,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:44,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:44,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:24:44,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:44,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:44,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:44,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:44,274 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:24:44,301 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:24:44,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:24:44,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:44,350 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:44,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:24:44,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:24:44,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:24:44,351 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:44,351 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-28 10:24:44,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:44,495 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-28 10:24:44,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:24:44,498 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-28 10:24:44,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:44,499 INFO L225 Difference]: With dead ends: 9 [2018-09-28 10:24:44,499 INFO L226 Difference]: Without dead ends: 7 [2018-09-28 10:24:44,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:44,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-28 10:24:44,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-28 10:24:44,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-28 10:24:44,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-28 10:24:44,503 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-28 10:24:44,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:44,503 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-28 10:24:44,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:24:44,504 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-28 10:24:44,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-28 10:24:44,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:44,504 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-28 10:24:44,505 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:44,505 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:44,505 INFO L82 PathProgramCache]: Analyzing trace with hash 894183756, now seen corresponding path program 3 times [2018-09-28 10:24:44,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:44,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:44,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:44,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:24:44,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:44,747 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:44,747 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:44,756 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:24:44,774 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-28 10:24:44,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:24:44,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:44,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:44,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:24:44,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:24:44,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:24:44,825 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:44,825 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-28 10:24:44,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:44,960 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-28 10:24:44,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:24:44,964 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-28 10:24:44,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:44,964 INFO L225 Difference]: With dead ends: 10 [2018-09-28 10:24:44,965 INFO L226 Difference]: Without dead ends: 8 [2018-09-28 10:24:44,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:44,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-28 10:24:44,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-28 10:24:44,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-28 10:24:44,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-28 10:24:44,968 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-28 10:24:44,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:44,969 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-28 10:24:44,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:24:44,969 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-28 10:24:44,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 10:24:44,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:44,970 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-28 10:24:44,970 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:44,970 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:44,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1949894467, now seen corresponding path program 4 times [2018-09-28 10:24:44,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:44,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:44,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:44,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:24:44,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:45,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:45,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:45,067 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:24:45,105 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:24:45,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:24:45,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:45,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:45,225 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:45,225 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:24:45,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:24:45,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:24:45,226 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:45,226 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-28 10:24:45,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:45,286 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-28 10:24:45,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:24:45,287 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-28 10:24:45,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:45,287 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:24:45,287 INFO L226 Difference]: Without dead ends: 9 [2018-09-28 10:24:45,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:45,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-28 10:24:45,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-28 10:24:45,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-28 10:24:45,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-28 10:24:45,291 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-28 10:24:45,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:45,291 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-28 10:24:45,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:24:45,291 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-28 10:24:45,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 10:24:45,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:45,292 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-28 10:24:45,292 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:45,293 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:45,293 INFO L82 PathProgramCache]: Analyzing trace with hash 317188140, now seen corresponding path program 5 times [2018-09-28 10:24:45,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:45,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:45,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:45,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:24:45,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:45,416 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:45,416 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:45,426 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:24:45,439 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-28 10:24:45,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:24:45,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:45,495 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:45,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:24:45,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:24:45,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:24:45,496 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:45,497 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-28 10:24:45,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:45,689 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-28 10:24:45,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:24:45,691 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-28 10:24:45,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:45,691 INFO L225 Difference]: With dead ends: 12 [2018-09-28 10:24:45,692 INFO L226 Difference]: Without dead ends: 10 [2018-09-28 10:24:45,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:45,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-28 10:24:45,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-28 10:24:45,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-28 10:24:45,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-28 10:24:45,695 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-28 10:24:45,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:45,696 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-28 10:24:45,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:24:45,696 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-28 10:24:45,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:24:45,697 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:45,697 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-28 10:24:45,697 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:45,697 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:45,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1242899555, now seen corresponding path program 6 times [2018-09-28 10:24:45,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:45,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:45,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:45,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:24:45,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:46,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:46,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:46,209 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:24:46,220 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-28 10:24:46,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:24:46,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:46,279 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:46,279 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:24:46,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:24:46,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:24:46,280 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:46,280 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-28 10:24:46,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:46,365 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-28 10:24:46,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:24:46,367 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-28 10:24:46,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:46,367 INFO L225 Difference]: With dead ends: 13 [2018-09-28 10:24:46,367 INFO L226 Difference]: Without dead ends: 11 [2018-09-28 10:24:46,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:46,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-28 10:24:46,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-28 10:24:46,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-28 10:24:46,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-28 10:24:46,371 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-28 10:24:46,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:46,371 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-28 10:24:46,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:24:46,371 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-28 10:24:46,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-28 10:24:46,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:46,372 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-28 10:24:46,372 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:46,373 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:46,373 INFO L82 PathProgramCache]: Analyzing trace with hash -124817652, now seen corresponding path program 7 times [2018-09-28 10:24:46,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:46,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:46,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:46,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:24:46,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:46,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:46,469 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:46,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:24:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:46,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:46,548 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:46,548 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:24:46,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:24:46,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:24:46,549 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:46,549 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-28 10:24:46,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:46,672 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-28 10:24:46,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:24:46,672 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-28 10:24:46,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:46,673 INFO L225 Difference]: With dead ends: 14 [2018-09-28 10:24:46,673 INFO L226 Difference]: Without dead ends: 12 [2018-09-28 10:24:46,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:46,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-28 10:24:46,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-28 10:24:46,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 10:24:46,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-28 10:24:46,678 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-28 10:24:46,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:46,678 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-28 10:24:46,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:24:46,678 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-28 10:24:46,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:24:46,679 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:46,679 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-28 10:24:46,679 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:46,679 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:46,679 INFO L82 PathProgramCache]: Analyzing trace with hash 425621891, now seen corresponding path program 8 times [2018-09-28 10:24:46,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:46,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:46,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:46,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:24:46,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:46,907 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:46,907 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:46,919 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:24:46,938 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:24:46,938 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:24:46,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:47,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:47,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:24:47,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:24:47,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:24:47,027 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:47,027 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-28 10:24:47,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:47,163 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-28 10:24:47,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:24:47,163 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-28 10:24:47,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:47,164 INFO L225 Difference]: With dead ends: 15 [2018-09-28 10:24:47,164 INFO L226 Difference]: Without dead ends: 13 [2018-09-28 10:24:47,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:47,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-28 10:24:47,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-28 10:24:47,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-28 10:24:47,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-28 10:24:47,168 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-28 10:24:47,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:47,168 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-28 10:24:47,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:24:47,168 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-28 10:24:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-28 10:24:47,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:47,169 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-28 10:24:47,169 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:47,169 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:47,170 INFO L82 PathProgramCache]: Analyzing trace with hash 309378540, now seen corresponding path program 9 times [2018-09-28 10:24:47,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:47,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:47,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:47,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:24:47,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:47,327 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:47,327 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:47,335 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:24:47,391 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-28 10:24:47,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:24:47,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:47,462 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:47,463 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-28 10:24:47,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 10:24:47,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 10:24:47,463 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:47,463 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-28 10:24:47,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:47,554 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-28 10:24:47,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 10:24:47,555 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-28 10:24:47,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:47,556 INFO L225 Difference]: With dead ends: 16 [2018-09-28 10:24:47,556 INFO L226 Difference]: Without dead ends: 14 [2018-09-28 10:24:47,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:47,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-28 10:24:47,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-28 10:24:47,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:24:47,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-28 10:24:47,560 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-28 10:24:47,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:47,561 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-28 10:24:47,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 10:24:47,561 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-28 10:24:47,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:24:47,561 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:47,561 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-28 10:24:47,562 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:47,562 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:47,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1000801955, now seen corresponding path program 10 times [2018-09-28 10:24:47,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:47,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:47,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:47,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:24:47,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:47,660 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:47,660 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:47,670 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:24:47,697 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:24:47,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:24:47,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:47,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:47,772 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-28 10:24:47,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 10:24:47,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 10:24:47,773 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:47,773 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-28 10:24:47,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:47,866 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-28 10:24:47,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 10:24:47,867 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-28 10:24:47,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:47,868 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:24:47,868 INFO L226 Difference]: Without dead ends: 15 [2018-09-28 10:24:47,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:47,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-28 10:24:47,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-28 10:24:47,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-28 10:24:47,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-28 10:24:47,872 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-28 10:24:47,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:47,873 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-28 10:24:47,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 10:24:47,873 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-28 10:24:47,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 10:24:47,873 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:47,874 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-28 10:24:47,874 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:47,874 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:47,874 INFO L82 PathProgramCache]: Analyzing trace with hash 960091340, now seen corresponding path program 11 times [2018-09-28 10:24:47,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:47,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:47,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:47,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:24:47,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:48,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:48,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:48,037 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:24:48,060 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:24:48,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:24:48,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:48,114 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:48,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:48,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-28 10:24:48,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 10:24:48,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 10:24:48,136 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:48,137 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-28 10:24:48,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:48,238 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-28 10:24:48,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-28 10:24:48,239 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-28 10:24:48,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:48,240 INFO L225 Difference]: With dead ends: 18 [2018-09-28 10:24:48,240 INFO L226 Difference]: Without dead ends: 16 [2018-09-28 10:24:48,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:48,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-28 10:24:48,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-28 10:24:48,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:24:48,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-28 10:24:48,243 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-28 10:24:48,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:48,244 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-28 10:24:48,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 10:24:48,244 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-28 10:24:48,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:24:48,245 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:48,245 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-28 10:24:48,245 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:48,245 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:48,245 INFO L82 PathProgramCache]: Analyzing trace with hash -301937725, now seen corresponding path program 12 times [2018-09-28 10:24:48,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:48,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:48,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:48,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:24:48,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:48,371 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:48,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:48,381 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:24:48,404 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:24:48,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:24:48,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:48,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:48,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-28 10:24:48,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 10:24:48,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 10:24:48,481 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:48,481 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-28 10:24:48,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:48,612 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-28 10:24:48,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 10:24:48,613 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-28 10:24:48,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:48,614 INFO L225 Difference]: With dead ends: 19 [2018-09-28 10:24:48,614 INFO L226 Difference]: Without dead ends: 17 [2018-09-28 10:24:48,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:48,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-28 10:24:48,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-28 10:24:48,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-28 10:24:48,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-28 10:24:48,619 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-28 10:24:48,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:48,619 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-28 10:24:48,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 10:24:48,619 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-28 10:24:48,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-28 10:24:48,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:48,620 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-28 10:24:48,620 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:48,620 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:48,620 INFO L82 PathProgramCache]: Analyzing trace with hash -770133076, now seen corresponding path program 13 times [2018-09-28 10:24:48,620 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:48,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:48,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:48,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:24:48,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:48,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:48,752 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:48,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:24:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:48,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:48,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:48,885 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-28 10:24:48,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 10:24:48,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 10:24:48,886 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:48,887 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-28 10:24:49,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:49,164 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-28 10:24:49,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 10:24:49,165 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-28 10:24:49,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:49,165 INFO L225 Difference]: With dead ends: 20 [2018-09-28 10:24:49,166 INFO L226 Difference]: Without dead ends: 18 [2018-09-28 10:24:49,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:49,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-28 10:24:49,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-28 10:24:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:24:49,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-28 10:24:49,170 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-28 10:24:49,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:49,170 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-28 10:24:49,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 10:24:49,171 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-28 10:24:49,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:24:49,171 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:49,171 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-28 10:24:49,172 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:49,172 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:49,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1895680227, now seen corresponding path program 14 times [2018-09-28 10:24:49,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:49,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:49,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:49,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:24:49,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:49,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:49,383 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:49,409 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:24:49,449 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:24:49,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:24:49,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:49,824 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:49,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:49,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-28 10:24:49,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 10:24:49,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 10:24:49,846 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:49,846 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-28 10:24:49,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:49,961 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-28 10:24:49,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:24:49,961 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-28 10:24:49,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:49,962 INFO L225 Difference]: With dead ends: 21 [2018-09-28 10:24:49,962 INFO L226 Difference]: Without dead ends: 19 [2018-09-28 10:24:49,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:49,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-28 10:24:49,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-28 10:24:49,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-28 10:24:49,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-28 10:24:49,966 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-28 10:24:49,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:49,966 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-28 10:24:49,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 10:24:49,966 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-28 10:24:49,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 10:24:49,967 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:49,967 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-28 10:24:49,967 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:49,967 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:49,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1363453300, now seen corresponding path program 15 times [2018-09-28 10:24:49,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:49,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:49,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:49,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:24:49,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:50,181 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:50,181 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:50,189 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:24:50,211 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:24:50,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:24:50,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:50,317 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:50,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-28 10:24:50,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 10:24:50,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 10:24:50,318 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:50,318 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-28 10:24:50,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:50,681 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-28 10:24:50,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-28 10:24:50,682 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-28 10:24:50,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:50,683 INFO L225 Difference]: With dead ends: 22 [2018-09-28 10:24:50,683 INFO L226 Difference]: Without dead ends: 20 [2018-09-28 10:24:50,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:50,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-28 10:24:50,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-28 10:24:50,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:24:50,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-28 10:24:50,688 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-28 10:24:50,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:50,689 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-28 10:24:50,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 10:24:50,689 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-28 10:24:50,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:24:50,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:50,690 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-28 10:24:50,690 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:50,690 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:50,690 INFO L82 PathProgramCache]: Analyzing trace with hash 682622467, now seen corresponding path program 16 times [2018-09-28 10:24:50,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:50,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:50,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:50,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:24:50,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:50,944 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:50,944 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:50,952 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:24:50,975 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:24:50,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:24:50,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:51,278 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:51,279 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-28 10:24:51,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-28 10:24:51,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-28 10:24:51,279 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:51,279 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-28 10:24:51,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:51,452 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-28 10:24:51,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 10:24:51,453 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-28 10:24:51,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:51,454 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:24:51,454 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 10:24:51,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:51,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 10:24:51,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-28 10:24:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-28 10:24:51,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-28 10:24:51,457 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-28 10:24:51,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:51,458 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-28 10:24:51,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-28 10:24:51,458 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-28 10:24:51,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-28 10:24:51,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:51,458 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-28 10:24:51,459 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:51,459 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:51,459 INFO L82 PathProgramCache]: Analyzing trace with hash -313538196, now seen corresponding path program 17 times [2018-09-28 10:24:51,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:51,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:51,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:51,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:24:51,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:51,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:51,625 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:51,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:51,633 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:24:51,653 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-28 10:24:51,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:24:51,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:51,779 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:51,779 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-28 10:24:51,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:24:51,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:24:51,780 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:51,780 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-28 10:24:51,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:51,940 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-28 10:24:51,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 10:24:51,941 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-28 10:24:51,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:51,942 INFO L225 Difference]: With dead ends: 24 [2018-09-28 10:24:51,942 INFO L226 Difference]: Without dead ends: 22 [2018-09-28 10:24:51,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:51,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-28 10:24:51,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-28 10:24:51,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:24:51,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-28 10:24:51,946 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-28 10:24:51,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:51,947 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-28 10:24:51,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 10:24:51,947 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-28 10:24:51,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-28 10:24:51,947 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:51,948 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-28 10:24:51,948 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:51,948 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:51,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1129747677, now seen corresponding path program 18 times [2018-09-28 10:24:51,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:51,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:51,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:51,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:24:51,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:52,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:52,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:52,091 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:24:52,121 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-28 10:24:52,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:24:52,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:52,302 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:52,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-28 10:24:52,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-28 10:24:52,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-28 10:24:52,303 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:52,303 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-28 10:24:52,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:52,463 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-28 10:24:52,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 10:24:52,464 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-28 10:24:52,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:52,465 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:24:52,465 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:24:52,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:52,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:24:52,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-28 10:24:52,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-28 10:24:52,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-28 10:24:52,469 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-28 10:24:52,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:52,470 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-28 10:24:52,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-28 10:24:52,470 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-28 10:24:52,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 10:24:52,471 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:52,471 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-28 10:24:52,471 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:52,471 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:52,472 INFO L82 PathProgramCache]: Analyzing trace with hash -662437812, now seen corresponding path program 19 times [2018-09-28 10:24:52,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:52,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:52,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:52,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:24:52,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:52,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:53,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:53,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:53,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:24:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:53,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:53,226 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:53,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-28 10:24:53,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-28 10:24:53,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-28 10:24:53,228 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:53,228 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-28 10:24:53,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:53,481 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-28 10:24:53,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-28 10:24:53,482 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-28 10:24:53,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:53,483 INFO L225 Difference]: With dead ends: 26 [2018-09-28 10:24:53,483 INFO L226 Difference]: Without dead ends: 24 [2018-09-28 10:24:53,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:53,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-28 10:24:53,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-28 10:24:53,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:24:53,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-28 10:24:53,486 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-28 10:24:53,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:53,486 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-28 10:24:53,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-28 10:24:53,487 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-28 10:24:53,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-28 10:24:53,487 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:53,487 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-28 10:24:53,487 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:53,488 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:53,488 INFO L82 PathProgramCache]: Analyzing trace with hash 939266115, now seen corresponding path program 20 times [2018-09-28 10:24:53,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:53,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:53,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:53,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:24:53,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:53,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:53,825 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:53,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:53,834 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:24:53,854 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:24:53,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:24:53,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:53,960 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:53,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-28 10:24:53,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-28 10:24:53,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-28 10:24:53,961 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:53,962 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-28 10:24:54,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:54,100 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-28 10:24:54,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:24:54,101 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-28 10:24:54,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:54,102 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:24:54,102 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:24:54,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:54,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:24:54,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-28 10:24:54,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-28 10:24:54,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-28 10:24:54,106 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-28 10:24:54,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:54,106 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-28 10:24:54,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-28 10:24:54,107 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-28 10:24:54,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-28 10:24:54,107 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:54,107 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-28 10:24:54,108 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:54,108 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:54,108 INFO L82 PathProgramCache]: Analyzing trace with hash -947519700, now seen corresponding path program 21 times [2018-09-28 10:24:54,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:54,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:54,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:54,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:24:54,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:54,253 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:54,253 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:54,253 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:54,261 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:24:54,286 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-28 10:24:54,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:24:54,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:54,574 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:54,612 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:54,612 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-28 10:24:54,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-28 10:24:54,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-28 10:24:54,613 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:54,614 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-28 10:24:55,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:55,020 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-28 10:24:55,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 10:24:55,024 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-28 10:24:55,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:55,025 INFO L225 Difference]: With dead ends: 28 [2018-09-28 10:24:55,025 INFO L226 Difference]: Without dead ends: 26 [2018-09-28 10:24:55,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:55,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-28 10:24:55,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-28 10:24:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:24:55,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-28 10:24:55,029 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-28 10:24:55,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:55,029 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-28 10:24:55,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-28 10:24:55,029 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-28 10:24:55,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-28 10:24:55,030 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:55,030 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-28 10:24:55,030 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:55,030 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:55,030 INFO L82 PathProgramCache]: Analyzing trace with hash 691662179, now seen corresponding path program 22 times [2018-09-28 10:24:55,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:55,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:55,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:55,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:24:55,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:55,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:55,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:55,200 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:24:55,219 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:24:55,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:24:55,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:55,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:55,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-28 10:24:55,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-28 10:24:55,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-28 10:24:55,422 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:55,422 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-28 10:24:55,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:55,667 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-28 10:24:55,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 10:24:55,667 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-28 10:24:55,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:55,668 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:24:55,668 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:24:55,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:55,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:24:55,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-28 10:24:55,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-28 10:24:55,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-28 10:24:55,673 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-28 10:24:55,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:55,674 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-28 10:24:55,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-28 10:24:55,674 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-28 10:24:55,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-28 10:24:55,674 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:55,674 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-28 10:24:55,675 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:55,675 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:55,675 INFO L82 PathProgramCache]: Analyzing trace with hash -33307124, now seen corresponding path program 23 times [2018-09-28 10:24:55,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:55,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:55,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:55,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:24:55,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:55,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:55,857 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:55,865 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:24:55,896 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-28 10:24:55,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:24:55,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:56,019 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:56,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-28 10:24:56,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-28 10:24:56,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-28 10:24:56,020 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:56,020 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-28 10:24:56,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:56,301 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-28 10:24:56,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-28 10:24:56,307 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-28 10:24:56,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:56,307 INFO L225 Difference]: With dead ends: 30 [2018-09-28 10:24:56,307 INFO L226 Difference]: Without dead ends: 28 [2018-09-28 10:24:56,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:56,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-28 10:24:56,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-28 10:24:56,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:24:56,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-28 10:24:56,311 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-28 10:24:56,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:56,311 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-28 10:24:56,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-28 10:24:56,312 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-28 10:24:56,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-28 10:24:56,312 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:56,312 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-28 10:24:56,313 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:56,313 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:56,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1032519037, now seen corresponding path program 24 times [2018-09-28 10:24:56,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:56,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:56,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:56,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:24:56,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:56,502 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:56,503 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:56,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:56,525 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:24:56,553 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-28 10:24:56,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:24:56,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:56,720 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:56,720 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-28 10:24:56,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-28 10:24:56,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-28 10:24:56,721 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:56,721 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-28 10:24:56,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:56,873 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-28 10:24:56,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 10:24:56,873 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-28 10:24:56,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:56,874 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:24:56,874 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:24:56,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:56,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:24:56,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-28 10:24:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-28 10:24:56,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-28 10:24:56,878 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-28 10:24:56,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:56,879 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-28 10:24:56,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-28 10:24:56,879 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-28 10:24:56,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-28 10:24:56,879 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:56,880 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-28 10:24:56,880 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:56,880 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:56,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1943317268, now seen corresponding path program 25 times [2018-09-28 10:24:56,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:56,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:56,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:56,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:24:56,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:57,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:57,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:57,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:24:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:57,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:57,677 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:57,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-28 10:24:57,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-28 10:24:57,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-28 10:24:57,678 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:57,678 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-28 10:24:57,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:57,860 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-28 10:24:57,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-28 10:24:57,860 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-28 10:24:57,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:57,861 INFO L225 Difference]: With dead ends: 32 [2018-09-28 10:24:57,861 INFO L226 Difference]: Without dead ends: 30 [2018-09-28 10:24:57,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:57,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-28 10:24:57,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-28 10:24:57,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:24:57,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-28 10:24:57,864 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-28 10:24:57,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:57,864 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-28 10:24:57,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-28 10:24:57,864 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-28 10:24:57,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-28 10:24:57,864 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:57,864 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-28 10:24:57,865 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:57,865 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:57,865 INFO L82 PathProgramCache]: Analyzing trace with hash -113291357, now seen corresponding path program 26 times [2018-09-28 10:24:57,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:57,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:57,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:57,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:24:57,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:58,380 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:58,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:58,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:24:58,409 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:24:58,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:24:58,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:58,464 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:58,485 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:58,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-28 10:24:58,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-28 10:24:58,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-28 10:24:58,486 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:58,486 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-28 10:24:58,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:58,707 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-28 10:24:58,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 10:24:58,708 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-28 10:24:58,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:58,708 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:24:58,708 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:24:58,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:58,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:24:58,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-28 10:24:58,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-28 10:24:58,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-28 10:24:58,711 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-28 10:24:58,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:58,712 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-28 10:24:58,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-28 10:24:58,712 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-28 10:24:58,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-28 10:24:58,712 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:58,712 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-28 10:24:58,713 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:58,713 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:58,713 INFO L82 PathProgramCache]: Analyzing trace with hash 782937036, now seen corresponding path program 27 times [2018-09-28 10:24:58,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:58,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:58,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:58,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:24:58,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:59,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:59,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:59,089 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:24:59,116 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-28 10:24:59,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:24:59,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:59,239 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:59,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-28 10:24:59,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-28 10:24:59,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-28 10:24:59,240 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:59,240 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-28 10:24:59,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:59,425 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-28 10:24:59,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-28 10:24:59,426 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-28 10:24:59,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:59,427 INFO L225 Difference]: With dead ends: 34 [2018-09-28 10:24:59,427 INFO L226 Difference]: Without dead ends: 32 [2018-09-28 10:24:59,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:59,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-28 10:24:59,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-28 10:24:59,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:24:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-28 10:24:59,431 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-28 10:24:59,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:59,431 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-28 10:24:59,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-28 10:24:59,432 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-28 10:24:59,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-28 10:24:59,432 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:59,432 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-28 10:24:59,432 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:59,432 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:59,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1498753853, now seen corresponding path program 28 times [2018-09-28 10:24:59,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:59,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:59,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:59,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:24:59,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:24:59,649 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:59,649 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:24:59,649 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:24:59,665 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:24:59,702 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:24:59,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:24:59,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:24:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:24:59,799 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:24:59,800 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-28 10:24:59,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-28 10:24:59,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-28 10:24:59,800 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:24:59,801 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-28 10:24:59,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:24:59,942 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-28 10:24:59,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-28 10:24:59,943 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-28 10:24:59,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:24:59,943 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:24:59,943 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:24:59,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:24:59,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:24:59,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-28 10:24:59,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-28 10:24:59,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-28 10:24:59,948 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-28 10:24:59,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:24:59,948 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-28 10:24:59,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-28 10:24:59,949 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-28 10:24:59,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-28 10:24:59,949 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:24:59,949 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-28 10:24:59,950 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:24:59,950 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:24:59,950 INFO L82 PathProgramCache]: Analyzing trace with hash 783272620, now seen corresponding path program 29 times [2018-09-28 10:24:59,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:24:59,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:24:59,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:59,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:24:59,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:24:59,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:00,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:00,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:00,137 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:25:00,164 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-28 10:25:00,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:00,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:00,229 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:00,250 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:00,250 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-28 10:25:00,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-28 10:25:00,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-28 10:25:00,251 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:00,251 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-28 10:25:00,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:00,467 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-28 10:25:00,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 10:25:00,467 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-28 10:25:00,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:00,468 INFO L225 Difference]: With dead ends: 36 [2018-09-28 10:25:00,468 INFO L226 Difference]: Without dead ends: 34 [2018-09-28 10:25:00,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:00,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-28 10:25:00,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-28 10:25:00,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:25:00,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-28 10:25:00,471 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-28 10:25:00,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:00,471 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-28 10:25:00,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-28 10:25:00,471 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-28 10:25:00,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 10:25:00,472 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:00,472 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-28 10:25:00,472 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:00,472 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:00,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1488350749, now seen corresponding path program 30 times [2018-09-28 10:25:00,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:00,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:00,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:00,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:00,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:00,681 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:00,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:00,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:00,692 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:25:00,724 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-28 10:25:00,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:00,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:00,856 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:00,856 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-28 10:25:00,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-28 10:25:00,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-28 10:25:00,857 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:00,857 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-28 10:25:01,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:01,074 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-28 10:25:01,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-28 10:25:01,074 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-28 10:25:01,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:01,075 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:25:01,075 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:25:01,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:01,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:25:01,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-28 10:25:01,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-28 10:25:01,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-28 10:25:01,078 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-28 10:25:01,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:01,078 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-28 10:25:01,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-28 10:25:01,078 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-28 10:25:01,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-28 10:25:01,078 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:01,078 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-28 10:25:01,078 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:01,079 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:01,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1105768844, now seen corresponding path program 31 times [2018-09-28 10:25:01,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:01,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:01,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:01,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:01,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:01,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:01,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:01,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:25:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:01,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:01,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:01,566 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-28 10:25:01,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-28 10:25:01,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-28 10:25:01,567 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:01,567 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-28 10:25:01,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:01,813 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-28 10:25:01,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 10:25:01,813 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-28 10:25:01,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:01,814 INFO L225 Difference]: With dead ends: 38 [2018-09-28 10:25:01,814 INFO L226 Difference]: Without dead ends: 36 [2018-09-28 10:25:01,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:01,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-28 10:25:01,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-28 10:25:01,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-28 10:25:01,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-28 10:25:01,818 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-28 10:25:01,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:01,818 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-28 10:25:01,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-28 10:25:01,818 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-28 10:25:01,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-28 10:25:01,819 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:01,819 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-28 10:25:01,820 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:01,820 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:01,820 INFO L82 PathProgramCache]: Analyzing trace with hash -80902397, now seen corresponding path program 32 times [2018-09-28 10:25:01,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:01,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:01,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:01,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:25:01,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:02,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:02,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:02,105 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:25:02,142 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:25:02,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:02,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:02,221 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:02,241 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:02,241 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-28 10:25:02,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-28 10:25:02,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-28 10:25:02,242 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:02,242 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-28 10:25:02,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:02,479 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-28 10:25:02,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 10:25:02,480 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-28 10:25:02,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:02,481 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:25:02,481 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:25:02,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:02,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:25:02,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-28 10:25:02,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-28 10:25:02,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-28 10:25:02,484 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-28 10:25:02,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:02,484 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-28 10:25:02,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-28 10:25:02,484 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-28 10:25:02,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-28 10:25:02,485 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:02,485 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-28 10:25:02,485 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:02,486 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:02,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1786994796, now seen corresponding path program 33 times [2018-09-28 10:25:02,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:02,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:02,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:02,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:02,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:03,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:03,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:03,009 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:25:03,042 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-28 10:25:03,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:03,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:03,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:03,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-28 10:25:03,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-28 10:25:03,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-28 10:25:03,310 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:03,310 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-28 10:25:03,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:03,480 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-28 10:25:03,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-28 10:25:03,481 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-28 10:25:03,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:03,482 INFO L225 Difference]: With dead ends: 40 [2018-09-28 10:25:03,482 INFO L226 Difference]: Without dead ends: 38 [2018-09-28 10:25:03,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:03,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-28 10:25:03,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-28 10:25:03,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-28 10:25:03,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-28 10:25:03,485 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-28 10:25:03,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:03,485 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-28 10:25:03,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-28 10:25:03,486 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-28 10:25:03,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-28 10:25:03,486 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:03,486 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-28 10:25:03,486 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:03,487 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:03,487 INFO L82 PathProgramCache]: Analyzing trace with hash -437734365, now seen corresponding path program 34 times [2018-09-28 10:25:03,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:03,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:03,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:03,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:03,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:03,716 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:03,716 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:03,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:03,724 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:25:03,759 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:25:03,759 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:03,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:03,967 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:03,967 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-28 10:25:03,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-28 10:25:03,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-28 10:25:03,968 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:03,968 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-28 10:25:04,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:04,196 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-28 10:25:04,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-28 10:25:04,196 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-28 10:25:04,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:04,197 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:25:04,197 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:25:04,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:04,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:25:04,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-28 10:25:04,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-28 10:25:04,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-28 10:25:04,201 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-28 10:25:04,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:04,201 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-28 10:25:04,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-28 10:25:04,202 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-28 10:25:04,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-28 10:25:04,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:04,202 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-28 10:25:04,203 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:04,203 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:04,203 INFO L82 PathProgramCache]: Analyzing trace with hash -684861620, now seen corresponding path program 35 times [2018-09-28 10:25:04,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:04,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:04,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:04,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:04,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:04,524 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:04,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:04,531 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:25:04,565 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-28 10:25:04,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:04,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:04,667 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:04,667 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-28 10:25:04,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-28 10:25:04,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-28 10:25:04,668 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:04,668 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-28 10:25:04,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:04,925 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-28 10:25:04,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-28 10:25:04,925 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-28 10:25:04,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:04,926 INFO L225 Difference]: With dead ends: 42 [2018-09-28 10:25:04,926 INFO L226 Difference]: Without dead ends: 40 [2018-09-28 10:25:04,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:04,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-28 10:25:04,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-28 10:25:04,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-28 10:25:04,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-28 10:25:04,928 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-28 10:25:04,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:04,929 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-28 10:25:04,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-28 10:25:04,929 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-28 10:25:04,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-28 10:25:04,929 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:04,930 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-28 10:25:04,930 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:04,930 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:04,930 INFO L82 PathProgramCache]: Analyzing trace with hash 244128067, now seen corresponding path program 36 times [2018-09-28 10:25:04,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:04,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:04,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:04,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:04,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:05,387 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:05,387 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:05,394 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:25:05,436 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-28 10:25:05,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:05,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:06,491 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:06,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-28 10:25:06,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-28 10:25:06,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-28 10:25:06,493 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:06,493 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-28 10:25:06,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:06,799 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-28 10:25:06,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-28 10:25:06,800 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-28 10:25:06,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:06,800 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:25:06,800 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:25:06,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:06,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:25:06,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-28 10:25:06,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-28 10:25:06,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-28 10:25:06,802 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-28 10:25:06,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:06,802 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-28 10:25:06,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-28 10:25:06,803 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-28 10:25:06,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-28 10:25:06,803 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:06,803 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-28 10:25:06,803 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:06,804 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:06,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1021962708, now seen corresponding path program 37 times [2018-09-28 10:25:06,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:06,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:06,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:06,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:06,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:07,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:07,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:07,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:25:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:07,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:07,193 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:07,193 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-28 10:25:07,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-28 10:25:07,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-28 10:25:07,194 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:07,194 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-28 10:25:07,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:07,453 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-28 10:25:07,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-28 10:25:07,454 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-28 10:25:07,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:07,454 INFO L225 Difference]: With dead ends: 44 [2018-09-28 10:25:07,454 INFO L226 Difference]: Without dead ends: 42 [2018-09-28 10:25:07,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:07,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-28 10:25:07,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-28 10:25:07,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-28 10:25:07,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-28 10:25:07,457 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-28 10:25:07,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:07,457 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-28 10:25:07,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-28 10:25:07,457 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-28 10:25:07,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-28 10:25:07,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:07,458 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-28 10:25:07,458 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:07,458 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:07,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1616071069, now seen corresponding path program 38 times [2018-09-28 10:25:07,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:07,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:07,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:07,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:25:07,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:07,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:07,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:07,741 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:25:07,773 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:25:07,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:07,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:07,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:07,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-28 10:25:07,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-28 10:25:07,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-28 10:25:07,894 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:07,894 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-28 10:25:08,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:08,163 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-28 10:25:08,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-28 10:25:08,163 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-28 10:25:08,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:08,164 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:25:08,164 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:25:08,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:08,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:25:08,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-28 10:25:08,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-28 10:25:08,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-28 10:25:08,167 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-28 10:25:08,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:08,167 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-28 10:25:08,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-28 10:25:08,168 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-28 10:25:08,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-28 10:25:08,168 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:08,168 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-28 10:25:08,168 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:08,169 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:08,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1441406220, now seen corresponding path program 39 times [2018-09-28 10:25:08,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:08,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:08,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:08,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:08,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:08,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:08,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:08,486 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:25:08,533 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-28 10:25:08,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:08,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:08,642 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:08,662 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:08,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-28 10:25:08,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-28 10:25:08,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-28 10:25:08,663 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:08,663 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-28 10:25:08,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:08,883 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-28 10:25:08,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-28 10:25:08,884 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-28 10:25:08,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:08,885 INFO L225 Difference]: With dead ends: 46 [2018-09-28 10:25:08,885 INFO L226 Difference]: Without dead ends: 44 [2018-09-28 10:25:08,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:08,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-28 10:25:08,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-28 10:25:08,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-28 10:25:08,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-28 10:25:08,887 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-28 10:25:08,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:08,887 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-28 10:25:08,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-28 10:25:08,887 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-28 10:25:08,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-28 10:25:08,887 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:08,887 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-28 10:25:08,888 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:08,888 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:08,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1733921667, now seen corresponding path program 40 times [2018-09-28 10:25:08,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:08,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:08,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:08,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:08,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:09,472 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:09,472 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:09,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:09,480 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:25:09,513 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:25:09,513 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:09,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:09,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:09,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-28 10:25:09,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-28 10:25:09,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-28 10:25:09,616 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:09,616 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-28 10:25:09,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:09,932 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-28 10:25:09,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-28 10:25:09,933 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-28 10:25:09,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:09,933 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:25:09,933 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:25:09,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:09,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:25:09,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-28 10:25:09,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-28 10:25:09,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-28 10:25:09,935 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-28 10:25:09,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:09,935 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-28 10:25:09,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-28 10:25:09,935 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-28 10:25:09,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-28 10:25:09,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:09,936 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-28 10:25:09,936 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:09,936 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:09,936 INFO L82 PathProgramCache]: Analyzing trace with hash -2083001364, now seen corresponding path program 41 times [2018-09-28 10:25:09,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:09,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:09,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:09,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:09,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:10,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:10,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:10,729 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:25:10,771 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-28 10:25:10,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:10,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:10,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:10,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-28 10:25:10,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-28 10:25:10,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-28 10:25:10,888 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:10,888 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-28 10:25:11,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:11,239 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-28 10:25:11,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-28 10:25:11,239 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-28 10:25:11,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:11,240 INFO L225 Difference]: With dead ends: 48 [2018-09-28 10:25:11,240 INFO L226 Difference]: Without dead ends: 46 [2018-09-28 10:25:11,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:11,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-28 10:25:11,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-28 10:25:11,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-28 10:25:11,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-28 10:25:11,241 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-28 10:25:11,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:11,242 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-28 10:25:11,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-28 10:25:11,242 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-28 10:25:11,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-28 10:25:11,242 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:11,242 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-28 10:25:11,242 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:11,242 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:11,242 INFO L82 PathProgramCache]: Analyzing trace with hash -148531037, now seen corresponding path program 42 times [2018-09-28 10:25:11,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:11,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:11,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:11,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:11,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:11,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:12,390 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:12,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:12,398 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:25:12,438 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-28 10:25:12,438 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:12,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:12,559 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:12,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-28 10:25:12,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-28 10:25:12,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-28 10:25:12,561 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:12,561 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-28 10:25:12,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:12,843 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-28 10:25:12,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-28 10:25:12,843 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-28 10:25:12,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:12,844 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:25:12,844 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:25:12,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:12,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:25:12,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-28 10:25:12,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-28 10:25:12,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-28 10:25:12,846 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-28 10:25:12,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:12,846 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-28 10:25:12,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-28 10:25:12,846 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-28 10:25:12,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-28 10:25:12,847 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:12,847 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-28 10:25:12,847 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:12,847 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:12,847 INFO L82 PathProgramCache]: Analyzing trace with hash -309493044, now seen corresponding path program 43 times [2018-09-28 10:25:12,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:12,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:12,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:12,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:12,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:12,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:13,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:13,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:13,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:25:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:13,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:13,418 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:13,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:13,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-28 10:25:13,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-28 10:25:13,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-28 10:25:13,438 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:13,439 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-28 10:25:13,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:13,771 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-28 10:25:13,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-28 10:25:13,772 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-28 10:25:13,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:13,772 INFO L225 Difference]: With dead ends: 50 [2018-09-28 10:25:13,772 INFO L226 Difference]: Without dead ends: 48 [2018-09-28 10:25:13,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:13,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-28 10:25:13,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-28 10:25:13,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-28 10:25:13,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-28 10:25:13,775 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-28 10:25:13,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:13,775 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-28 10:25:13,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-28 10:25:13,775 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-28 10:25:13,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-28 10:25:13,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:13,776 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-28 10:25:13,776 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:13,777 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:13,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1004347965, now seen corresponding path program 44 times [2018-09-28 10:25:13,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:13,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:13,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:13,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:25:13,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:14,002 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:14,002 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:14,009 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:25:14,046 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:25:14,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:14,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:14,153 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:14,172 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:14,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-28 10:25:14,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-28 10:25:14,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-28 10:25:14,173 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:14,173 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-28 10:25:14,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:14,472 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-28 10:25:14,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-28 10:25:14,472 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-28 10:25:14,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:14,473 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:25:14,473 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:25:14,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:14,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:25:14,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-28 10:25:14,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-28 10:25:14,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-28 10:25:14,476 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-28 10:25:14,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:14,476 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-28 10:25:14,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-28 10:25:14,477 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-28 10:25:14,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-28 10:25:14,477 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:14,477 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-28 10:25:14,478 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:14,478 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:14,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1070014036, now seen corresponding path program 45 times [2018-09-28 10:25:14,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:14,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:14,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:14,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:14,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:14,804 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:14,804 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:14,814 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:25:14,864 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-28 10:25:14,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:14,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:15,035 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:15,035 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-28 10:25:15,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-28 10:25:15,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-28 10:25:15,036 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:15,036 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-28 10:25:15,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:15,454 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-28 10:25:15,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-28 10:25:15,454 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-28 10:25:15,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:15,454 INFO L225 Difference]: With dead ends: 52 [2018-09-28 10:25:15,455 INFO L226 Difference]: Without dead ends: 50 [2018-09-28 10:25:15,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:15,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-28 10:25:15,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-28 10:25:15,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-28 10:25:15,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-28 10:25:15,457 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-28 10:25:15,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:15,457 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-28 10:25:15,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-28 10:25:15,458 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-28 10:25:15,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-28 10:25:15,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:15,458 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-28 10:25:15,459 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:15,459 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:15,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1189305059, now seen corresponding path program 46 times [2018-09-28 10:25:15,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:15,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:15,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:15,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:15,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:15,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:15,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:15,787 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:25:15,825 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:25:15,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:15,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:15,961 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:15,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-28 10:25:15,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-28 10:25:15,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-28 10:25:15,962 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:15,962 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-28 10:25:16,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:16,274 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-28 10:25:16,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-28 10:25:16,274 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-28 10:25:16,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:16,275 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:25:16,275 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:25:16,275 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:16,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:25:16,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-28 10:25:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-28 10:25:16,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-28 10:25:16,277 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-28 10:25:16,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:16,278 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-28 10:25:16,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-28 10:25:16,278 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-28 10:25:16,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-28 10:25:16,278 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:16,278 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-28 10:25:16,279 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:16,279 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:16,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1786247028, now seen corresponding path program 47 times [2018-09-28 10:25:16,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:16,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:16,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:16,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:16,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:16,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:16,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:16,624 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:25:16,688 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-28 10:25:16,689 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:16,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:16,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:16,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-28 10:25:16,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-28 10:25:16,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-28 10:25:16,903 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:16,903 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-28 10:25:17,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:17,233 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-28 10:25:17,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-28 10:25:17,233 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-28 10:25:17,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:17,234 INFO L225 Difference]: With dead ends: 54 [2018-09-28 10:25:17,234 INFO L226 Difference]: Without dead ends: 52 [2018-09-28 10:25:17,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:17,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-28 10:25:17,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-28 10:25:17,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-28 10:25:17,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-28 10:25:17,236 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-28 10:25:17,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:17,237 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-28 10:25:17,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-28 10:25:17,237 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-28 10:25:17,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-28 10:25:17,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:17,237 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-28 10:25:17,238 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:17,238 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:17,238 INFO L82 PathProgramCache]: Analyzing trace with hash 460918787, now seen corresponding path program 48 times [2018-09-28 10:25:17,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:17,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:17,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:17,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:17,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:17,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:17,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:17,675 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:17,682 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:25:17,729 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-28 10:25:17,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:17,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:17,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:17,867 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-28 10:25:17,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-28 10:25:17,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-28 10:25:17,867 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:17,868 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-28 10:25:18,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:18,113 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-28 10:25:18,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-28 10:25:18,114 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-28 10:25:18,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:18,114 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:25:18,114 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:25:18,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:18,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:25:18,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-28 10:25:18,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-28 10:25:18,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-28 10:25:18,117 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-28 10:25:18,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:18,117 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-28 10:25:18,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-28 10:25:18,117 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-28 10:25:18,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-28 10:25:18,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:18,118 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-28 10:25:18,118 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:18,118 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:18,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1403582316, now seen corresponding path program 49 times [2018-09-28 10:25:18,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:18,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:18,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:18,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:18,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:18,450 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:18,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:18,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:25:18,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:18,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:18,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:18,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:18,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-28 10:25:18,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-28 10:25:18,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-28 10:25:18,624 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:18,624 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-28 10:25:18,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:18,903 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-28 10:25:18,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-28 10:25:18,903 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-28 10:25:18,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:18,904 INFO L225 Difference]: With dead ends: 56 [2018-09-28 10:25:18,904 INFO L226 Difference]: Without dead ends: 54 [2018-09-28 10:25:18,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:18,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-28 10:25:18,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-28 10:25:18,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-28 10:25:18,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-28 10:25:18,906 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-28 10:25:18,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:18,906 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-28 10:25:18,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-28 10:25:18,907 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-28 10:25:18,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-28 10:25:18,907 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:18,907 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-28 10:25:18,907 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:18,908 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:18,908 INFO L82 PathProgramCache]: Analyzing trace with hash 561380643, now seen corresponding path program 50 times [2018-09-28 10:25:18,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:18,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:18,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:18,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:25:18,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:19,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:19,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:19,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:19,261 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:25:19,301 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:25:19,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:19,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:19,432 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:19,432 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-28 10:25:19,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-28 10:25:19,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-28 10:25:19,433 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:19,433 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-28 10:25:19,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:19,727 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-28 10:25:19,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-28 10:25:19,728 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-28 10:25:19,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:19,728 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:25:19,728 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:25:19,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:19,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:25:19,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-28 10:25:19,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-28 10:25:19,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-28 10:25:19,731 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-28 10:25:19,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:19,731 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-28 10:25:19,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-28 10:25:19,732 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-28 10:25:19,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-28 10:25:19,732 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:19,732 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-28 10:25:19,732 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:19,733 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:19,733 INFO L82 PathProgramCache]: Analyzing trace with hash 222932556, now seen corresponding path program 51 times [2018-09-28 10:25:19,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:19,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:19,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:19,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:19,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:20,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:20,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:20,037 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:25:20,095 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-28 10:25:20,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:20,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:20,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:20,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:20,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-28 10:25:20,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-28 10:25:20,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-28 10:25:20,316 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:20,316 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-28 10:25:20,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:20,748 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-28 10:25:20,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-28 10:25:20,748 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-28 10:25:20,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:20,749 INFO L225 Difference]: With dead ends: 58 [2018-09-28 10:25:20,749 INFO L226 Difference]: Without dead ends: 56 [2018-09-28 10:25:20,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:20,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-28 10:25:20,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-28 10:25:20,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-28 10:25:20,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-28 10:25:20,752 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-28 10:25:20,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:20,752 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-28 10:25:20,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-28 10:25:20,752 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-28 10:25:20,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-28 10:25:20,753 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:20,753 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-28 10:25:20,753 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:20,753 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:20,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1679023549, now seen corresponding path program 52 times [2018-09-28 10:25:20,753 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:20,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:20,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:20,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:20,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:21,075 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:21,075 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:21,083 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:25:21,126 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:25:21,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:21,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:21,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:21,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-28 10:25:21,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-28 10:25:21,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-28 10:25:21,249 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:21,249 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-28 10:25:21,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:21,609 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-28 10:25:21,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-28 10:25:21,609 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-28 10:25:21,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:21,610 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:25:21,610 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:25:21,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:21,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:25:21,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-28 10:25:21,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-28 10:25:21,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-28 10:25:21,612 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-28 10:25:21,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:21,613 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-28 10:25:21,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-28 10:25:21,613 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-28 10:25:21,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-28 10:25:21,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:21,613 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-28 10:25:21,613 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:21,614 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:21,614 INFO L82 PathProgramCache]: Analyzing trace with hash -510120660, now seen corresponding path program 53 times [2018-09-28 10:25:21,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:21,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:21,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:21,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:21,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:22,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:22,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:22,176 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:22,183 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:25:22,239 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-28 10:25:22,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:22,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:22,406 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:22,406 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-28 10:25:22,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-28 10:25:22,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-28 10:25:22,407 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:22,407 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-28 10:25:22,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:22,761 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-28 10:25:22,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-28 10:25:22,762 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-28 10:25:22,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:22,762 INFO L225 Difference]: With dead ends: 60 [2018-09-28 10:25:22,762 INFO L226 Difference]: Without dead ends: 58 [2018-09-28 10:25:22,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:22,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-28 10:25:22,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-28 10:25:22,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-28 10:25:22,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-28 10:25:22,764 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-28 10:25:22,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:22,765 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-28 10:25:22,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-28 10:25:22,765 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-28 10:25:22,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-28 10:25:22,765 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:22,765 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-28 10:25:22,765 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:22,766 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:22,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1366130531, now seen corresponding path program 54 times [2018-09-28 10:25:22,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:22,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:22,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:22,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:22,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:23,282 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:23,282 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:23,289 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:25:23,341 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-28 10:25:23,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:23,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:23,562 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:23,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-28 10:25:23,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-28 10:25:23,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-28 10:25:23,564 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:23,564 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-28 10:25:23,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:23,906 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-28 10:25:23,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-28 10:25:23,906 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-28 10:25:23,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:23,906 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:25:23,907 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:25:23,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:23,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:25:23,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-28 10:25:23,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-28 10:25:23,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-28 10:25:23,909 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-28 10:25:23,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:23,909 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-28 10:25:23,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-28 10:25:23,909 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-28 10:25:23,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-28 10:25:23,909 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:23,910 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-28 10:25:23,910 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:23,910 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:23,910 INFO L82 PathProgramCache]: Analyzing trace with hash -599624692, now seen corresponding path program 55 times [2018-09-28 10:25:23,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:23,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:23,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:23,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:23,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:24,183 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:24,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:24,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:25:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:24,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:24,372 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:24,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-28 10:25:24,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-28 10:25:24,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-28 10:25:24,373 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:24,373 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-28 10:25:24,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:24,765 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-28 10:25:24,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-28 10:25:24,766 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-28 10:25:24,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:24,766 INFO L225 Difference]: With dead ends: 62 [2018-09-28 10:25:24,766 INFO L226 Difference]: Without dead ends: 60 [2018-09-28 10:25:24,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:24,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-28 10:25:24,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-28 10:25:24,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-28 10:25:24,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-28 10:25:24,769 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-28 10:25:24,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:24,769 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-28 10:25:24,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-28 10:25:24,769 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-28 10:25:24,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-28 10:25:24,770 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:24,770 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-28 10:25:24,770 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:24,770 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:24,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1408494461, now seen corresponding path program 56 times [2018-09-28 10:25:24,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:24,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:24,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:24,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:25:24,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:25,075 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:25,075 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:25,082 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:25:25,134 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:25:25,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:25,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:25,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:25,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-28 10:25:25,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-28 10:25:25,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-28 10:25:25,315 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:25,315 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-28 10:25:25,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:25,674 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-28 10:25:25,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-28 10:25:25,674 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-28 10:25:25,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:25,675 INFO L225 Difference]: With dead ends: 63 [2018-09-28 10:25:25,675 INFO L226 Difference]: Without dead ends: 61 [2018-09-28 10:25:25,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:25,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-28 10:25:25,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-28 10:25:25,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-28 10:25:25,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-28 10:25:25,677 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-28 10:25:25,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:25,678 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-28 10:25:25,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-28 10:25:25,678 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-28 10:25:25,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-28 10:25:25,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:25,678 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-28 10:25:25,679 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:25,679 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:25,679 INFO L82 PathProgramCache]: Analyzing trace with hash -713653524, now seen corresponding path program 57 times [2018-09-28 10:25:25,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:25,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:25,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:25,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:25,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:26,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:26,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:26,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:26,020 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:25:26,085 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-28 10:25:26,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:26,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:26,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:26,225 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-28 10:25:26,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-28 10:25:26,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-28 10:25:26,225 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:26,226 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-28 10:25:26,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:26,626 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-28 10:25:26,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-28 10:25:26,626 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-28 10:25:26,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:26,627 INFO L225 Difference]: With dead ends: 64 [2018-09-28 10:25:26,627 INFO L226 Difference]: Without dead ends: 62 [2018-09-28 10:25:26,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:26,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-28 10:25:26,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-28 10:25:26,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-28 10:25:26,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-28 10:25:26,629 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-28 10:25:26,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:26,629 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-28 10:25:26,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-28 10:25:26,629 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-28 10:25:26,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-28 10:25:26,630 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:26,630 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-28 10:25:26,630 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:26,630 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:26,630 INFO L82 PathProgramCache]: Analyzing trace with hash -648420957, now seen corresponding path program 58 times [2018-09-28 10:25:26,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:26,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:26,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:26,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:26,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:27,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:27,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:27,237 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:25:27,282 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:25:27,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:27,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:27,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:27,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:27,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-28 10:25:27,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-28 10:25:27,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-28 10:25:27,414 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:27,414 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-28 10:25:27,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:27,827 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-28 10:25:27,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-28 10:25:27,827 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-28 10:25:27,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:27,827 INFO L225 Difference]: With dead ends: 65 [2018-09-28 10:25:27,827 INFO L226 Difference]: Without dead ends: 63 [2018-09-28 10:25:27,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:27,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-28 10:25:27,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-28 10:25:27,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-28 10:25:27,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-28 10:25:27,830 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-28 10:25:27,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:27,830 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-28 10:25:27,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-28 10:25:27,830 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-28 10:25:27,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-28 10:25:27,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:27,830 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-28 10:25:27,831 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:27,831 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:27,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1373788620, now seen corresponding path program 59 times [2018-09-28 10:25:27,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:27,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:27,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:27,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:27,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:30,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:30,655 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:30,662 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:25:30,724 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-28 10:25:30,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:30,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:30,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:30,940 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:30,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-28 10:25:30,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-28 10:25:30,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-28 10:25:30,942 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:30,942 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-28 10:25:31,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:31,378 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-28 10:25:31,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-28 10:25:31,378 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-28 10:25:31,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:31,379 INFO L225 Difference]: With dead ends: 66 [2018-09-28 10:25:31,379 INFO L226 Difference]: Without dead ends: 64 [2018-09-28 10:25:31,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:31,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-28 10:25:31,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-28 10:25:31,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-28 10:25:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-28 10:25:31,381 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-28 10:25:31,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:31,381 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-28 10:25:31,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-28 10:25:31,381 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-28 10:25:31,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-28 10:25:31,382 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:31,382 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-28 10:25:31,382 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:31,382 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:31,382 INFO L82 PathProgramCache]: Analyzing trace with hash -362223933, now seen corresponding path program 60 times [2018-09-28 10:25:31,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:31,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:31,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:31,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:31,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:32,362 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:32,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:32,370 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:25:32,428 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-28 10:25:32,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:32,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:32,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:32,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-28 10:25:32,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-28 10:25:32,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-28 10:25:32,579 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:32,579 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-28 10:25:32,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:32,952 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-28 10:25:32,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-28 10:25:32,952 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-28 10:25:32,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:32,953 INFO L225 Difference]: With dead ends: 67 [2018-09-28 10:25:32,953 INFO L226 Difference]: Without dead ends: 65 [2018-09-28 10:25:32,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:32,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-28 10:25:32,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-28 10:25:32,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-28 10:25:32,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-28 10:25:32,955 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-28 10:25:32,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:32,955 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-28 10:25:32,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-28 10:25:32,955 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-28 10:25:32,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-28 10:25:32,955 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:32,955 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-28 10:25:32,955 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:32,956 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:32,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1655961772, now seen corresponding path program 61 times [2018-09-28 10:25:32,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:32,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:32,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:32,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:32,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:33,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:33,857 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:33,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:25:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:33,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:34,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:34,058 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-28 10:25:34,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-28 10:25:34,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-28 10:25:34,059 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:34,059 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-28 10:25:34,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:34,396 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-28 10:25:34,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-28 10:25:34,396 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-28 10:25:34,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:34,397 INFO L225 Difference]: With dead ends: 68 [2018-09-28 10:25:34,397 INFO L226 Difference]: Without dead ends: 66 [2018-09-28 10:25:34,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:34,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-28 10:25:34,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-28 10:25:34,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-28 10:25:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-28 10:25:34,399 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-28 10:25:34,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:34,399 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-28 10:25:34,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-28 10:25:34,399 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-28 10:25:34,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-28 10:25:34,400 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:34,400 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-28 10:25:34,400 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:34,400 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:34,400 INFO L82 PathProgramCache]: Analyzing trace with hash -204790813, now seen corresponding path program 62 times [2018-09-28 10:25:34,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:34,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:34,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:34,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:25:34,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:34,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:36,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:36,678 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:36,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:36,688 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:25:36,738 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:25:36,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:36,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:36,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:36,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-28 10:25:36,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-28 10:25:36,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-28 10:25:36,895 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:36,895 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-28 10:25:37,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:37,512 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-28 10:25:37,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-28 10:25:37,513 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-28 10:25:37,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:37,513 INFO L225 Difference]: With dead ends: 69 [2018-09-28 10:25:37,513 INFO L226 Difference]: Without dead ends: 67 [2018-09-28 10:25:37,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:37,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-28 10:25:37,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-28 10:25:37,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-28 10:25:37,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-28 10:25:37,516 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-28 10:25:37,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:37,517 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-28 10:25:37,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-28 10:25:37,517 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-28 10:25:37,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-28 10:25:37,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:37,517 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-28 10:25:37,517 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:37,517 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:37,518 INFO L82 PathProgramCache]: Analyzing trace with hash -2053546100, now seen corresponding path program 63 times [2018-09-28 10:25:37,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:37,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:37,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:37,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:37,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:38,651 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:38,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:38,660 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:25:38,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-28 10:25:38,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:38,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:38,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:38,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:38,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-28 10:25:38,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-28 10:25:38,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-28 10:25:38,871 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:38,871 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-28 10:25:39,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:39,355 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-28 10:25:39,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-28 10:25:39,355 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-28 10:25:39,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:39,356 INFO L225 Difference]: With dead ends: 70 [2018-09-28 10:25:39,356 INFO L226 Difference]: Without dead ends: 68 [2018-09-28 10:25:39,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:39,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-28 10:25:39,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-28 10:25:39,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-28 10:25:39,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-28 10:25:39,359 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-28 10:25:39,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:39,359 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-28 10:25:39,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-28 10:25:39,359 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-28 10:25:39,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-28 10:25:39,360 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:39,360 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-28 10:25:39,360 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:39,360 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:39,360 INFO L82 PathProgramCache]: Analyzing trace with hash 764582147, now seen corresponding path program 64 times [2018-09-28 10:25:39,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:39,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:39,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:39,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:39,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:39,713 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:39,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:39,728 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:25:39,795 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:25:39,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:39,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:39,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:39,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-28 10:25:39,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-28 10:25:39,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-28 10:25:39,960 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:39,960 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-28 10:25:40,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:40,417 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-28 10:25:40,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-28 10:25:40,418 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-28 10:25:40,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:40,418 INFO L225 Difference]: With dead ends: 71 [2018-09-28 10:25:40,418 INFO L226 Difference]: Without dead ends: 69 [2018-09-28 10:25:40,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:40,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-28 10:25:40,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-28 10:25:40,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-28 10:25:40,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-28 10:25:40,420 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-28 10:25:40,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:40,421 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-28 10:25:40,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-28 10:25:40,421 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-28 10:25:40,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-28 10:25:40,421 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:40,421 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-28 10:25:40,421 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:40,421 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:40,422 INFO L82 PathProgramCache]: Analyzing trace with hash -2067755412, now seen corresponding path program 65 times [2018-09-28 10:25:40,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:40,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:40,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:40,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:40,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:40,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:40,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:40,745 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:25:40,814 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-28 10:25:40,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:40,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:41,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:41,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-28 10:25:41,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-28 10:25:41,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-28 10:25:41,065 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:41,065 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-28 10:25:41,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:41,526 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-28 10:25:41,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-28 10:25:41,526 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-28 10:25:41,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:41,527 INFO L225 Difference]: With dead ends: 72 [2018-09-28 10:25:41,527 INFO L226 Difference]: Without dead ends: 70 [2018-09-28 10:25:41,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:41,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-28 10:25:41,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-28 10:25:41,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-28 10:25:41,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-28 10:25:41,529 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-28 10:25:41,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:41,529 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-28 10:25:41,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-28 10:25:41,529 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-28 10:25:41,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-28 10:25:41,529 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:41,530 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-28 10:25:41,530 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:41,530 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:41,530 INFO L82 PathProgramCache]: Analyzing trace with hash 324093475, now seen corresponding path program 66 times [2018-09-28 10:25:41,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:41,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:41,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:41,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:41,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:41,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:41,844 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:41,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:41,851 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:25:41,927 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-28 10:25:41,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:41,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:42,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:42,252 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:42,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-28 10:25:42,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-28 10:25:42,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-28 10:25:42,253 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:42,253 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-09-28 10:25:42,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:42,696 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-28 10:25:42,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-28 10:25:42,696 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-09-28 10:25:42,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:42,697 INFO L225 Difference]: With dead ends: 73 [2018-09-28 10:25:42,697 INFO L226 Difference]: Without dead ends: 71 [2018-09-28 10:25:42,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:42,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-28 10:25:42,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-28 10:25:42,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-28 10:25:42,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-28 10:25:42,699 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-28 10:25:42,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:42,699 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-28 10:25:42,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-28 10:25:42,699 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-28 10:25:42,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-28 10:25:42,700 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:42,700 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-28 10:25:42,700 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:42,700 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:42,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1456964940, now seen corresponding path program 67 times [2018-09-28 10:25:42,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:42,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:42,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:42,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:42,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:43,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:43,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:43,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:25:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:43,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:43,884 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:43,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-28 10:25:43,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-28 10:25:43,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-28 10:25:43,885 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:43,886 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-09-28 10:25:44,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:44,403 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-28 10:25:44,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-28 10:25:44,404 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-28 10:25:44,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:44,404 INFO L225 Difference]: With dead ends: 74 [2018-09-28 10:25:44,404 INFO L226 Difference]: Without dead ends: 72 [2018-09-28 10:25:44,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:44,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-28 10:25:44,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-28 10:25:44,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-28 10:25:44,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-28 10:25:44,406 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-28 10:25:44,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:44,407 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-28 10:25:44,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-28 10:25:44,407 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-28 10:25:44,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-28 10:25:44,407 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:44,407 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-28 10:25:44,407 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:44,407 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:44,407 INFO L82 PathProgramCache]: Analyzing trace with hash -2078725309, now seen corresponding path program 68 times [2018-09-28 10:25:44,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:44,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:44,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:44,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:25:44,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:44,760 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:44,760 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:44,767 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:25:44,820 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:25:44,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:44,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:44,977 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:44,977 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-28 10:25:44,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-28 10:25:44,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-28 10:25:44,979 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:44,979 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-09-28 10:25:45,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:45,337 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-28 10:25:45,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-28 10:25:45,337 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-09-28 10:25:45,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:45,338 INFO L225 Difference]: With dead ends: 75 [2018-09-28 10:25:45,338 INFO L226 Difference]: Without dead ends: 73 [2018-09-28 10:25:45,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:45,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-28 10:25:45,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-28 10:25:45,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-28 10:25:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-28 10:25:45,340 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-28 10:25:45,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:45,340 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-28 10:25:45,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-28 10:25:45,341 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-28 10:25:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-28 10:25:45,341 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:45,341 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-28 10:25:45,341 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:45,342 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:45,342 INFO L82 PathProgramCache]: Analyzing trace with hash -15973332, now seen corresponding path program 69 times [2018-09-28 10:25:45,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:45,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:45,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:45,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:45,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:45,677 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:45,677 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:45,684 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:25:45,766 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-28 10:25:45,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:45,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:46,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:46,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:46,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-28 10:25:46,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-28 10:25:46,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-28 10:25:46,216 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:46,217 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-09-28 10:25:46,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:46,739 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-28 10:25:46,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-28 10:25:46,740 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-09-28 10:25:46,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:46,740 INFO L225 Difference]: With dead ends: 76 [2018-09-28 10:25:46,740 INFO L226 Difference]: Without dead ends: 74 [2018-09-28 10:25:46,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:46,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-28 10:25:46,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-28 10:25:46,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-28 10:25:46,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-28 10:25:46,743 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-28 10:25:46,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:46,743 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-28 10:25:46,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-28 10:25:46,743 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-28 10:25:46,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-28 10:25:46,744 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:46,744 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-28 10:25:46,744 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:46,744 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:46,744 INFO L82 PathProgramCache]: Analyzing trace with hash -495171485, now seen corresponding path program 70 times [2018-09-28 10:25:46,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:46,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:46,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:46,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:46,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:47,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:47,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:47,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:47,816 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:25:47,879 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:25:47,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:47,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:48,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:48,042 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-28 10:25:48,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-28 10:25:48,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-28 10:25:48,044 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:48,044 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-09-28 10:25:48,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:48,469 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-28 10:25:48,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-28 10:25:48,469 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-09-28 10:25:48,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:48,470 INFO L225 Difference]: With dead ends: 77 [2018-09-28 10:25:48,470 INFO L226 Difference]: Without dead ends: 75 [2018-09-28 10:25:48,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:48,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-28 10:25:48,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-28 10:25:48,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-28 10:25:48,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-28 10:25:48,472 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-28 10:25:48,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:48,473 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-28 10:25:48,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-28 10:25:48,473 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-28 10:25:48,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-28 10:25:48,473 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:48,473 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-28 10:25:48,474 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:48,474 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:48,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1829554956, now seen corresponding path program 71 times [2018-09-28 10:25:48,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:48,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:48,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:48,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:48,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:48,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:48,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:48,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:48,853 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:25:48,933 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-28 10:25:48,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:48,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:49,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:49,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-28 10:25:49,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-28 10:25:49,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-28 10:25:49,313 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:49,313 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-09-28 10:25:49,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:49,851 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-28 10:25:49,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-28 10:25:49,851 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-28 10:25:49,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:49,852 INFO L225 Difference]: With dead ends: 78 [2018-09-28 10:25:49,852 INFO L226 Difference]: Without dead ends: 76 [2018-09-28 10:25:49,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:49,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-28 10:25:49,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-28 10:25:49,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-28 10:25:49,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-28 10:25:49,857 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-28 10:25:49,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:49,857 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-28 10:25:49,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-28 10:25:49,857 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-28 10:25:49,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-28 10:25:49,858 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:49,858 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-28 10:25:49,858 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:49,858 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:49,859 INFO L82 PathProgramCache]: Analyzing trace with hash 881630595, now seen corresponding path program 72 times [2018-09-28 10:25:49,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:49,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:49,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:49,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:49,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:50,345 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:50,345 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:50,353 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:25:50,426 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-28 10:25:50,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:50,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:50,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:50,646 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:50,646 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-28 10:25:50,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-28 10:25:50,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-28 10:25:50,647 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:50,647 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-09-28 10:25:51,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:51,209 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-28 10:25:51,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-28 10:25:51,209 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-09-28 10:25:51,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:51,210 INFO L225 Difference]: With dead ends: 79 [2018-09-28 10:25:51,210 INFO L226 Difference]: Without dead ends: 77 [2018-09-28 10:25:51,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:51,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-28 10:25:51,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-28 10:25:51,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-28 10:25:51,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-28 10:25:51,213 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-28 10:25:51,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:51,213 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-28 10:25:51,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-28 10:25:51,213 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-28 10:25:51,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-28 10:25:51,214 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:51,214 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-28 10:25:51,214 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:51,214 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:51,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1560746476, now seen corresponding path program 73 times [2018-09-28 10:25:51,214 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:51,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:51,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:51,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:51,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:51,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:51,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:51,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:25:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:52,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:52,191 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:52,192 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-28 10:25:52,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-28 10:25:52,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-28 10:25:52,193 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:52,193 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-09-28 10:25:52,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:52,879 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-28 10:25:52,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-28 10:25:52,879 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-09-28 10:25:52,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:52,880 INFO L225 Difference]: With dead ends: 80 [2018-09-28 10:25:52,880 INFO L226 Difference]: Without dead ends: 78 [2018-09-28 10:25:52,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:52,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-28 10:25:52,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-28 10:25:52,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-28 10:25:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-28 10:25:52,882 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-28 10:25:52,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:52,883 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-28 10:25:52,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-28 10:25:52,883 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-28 10:25:52,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-28 10:25:52,883 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:52,883 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-28 10:25:52,884 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:52,884 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:52,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1138502307, now seen corresponding path program 74 times [2018-09-28 10:25:52,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:52,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:52,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:52,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:25:52,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:53,283 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:53,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:53,291 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:25:53,349 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:25:53,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:53,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:53,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:53,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:53,527 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-28 10:25:53,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-28 10:25:53,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-28 10:25:53,529 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:53,529 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-09-28 10:25:54,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:54,102 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-28 10:25:54,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-28 10:25:54,103 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-09-28 10:25:54,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:54,103 INFO L225 Difference]: With dead ends: 81 [2018-09-28 10:25:54,103 INFO L226 Difference]: Without dead ends: 79 [2018-09-28 10:25:54,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:54,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-28 10:25:54,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-28 10:25:54,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-28 10:25:54,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-28 10:25:54,106 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-28 10:25:54,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:54,107 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-28 10:25:54,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-28 10:25:54,107 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-28 10:25:54,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-28 10:25:54,107 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:54,107 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-28 10:25:54,107 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:54,107 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:54,108 INFO L82 PathProgramCache]: Analyzing trace with hash 933834956, now seen corresponding path program 75 times [2018-09-28 10:25:54,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:54,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:54,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:54,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:54,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:54,463 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:54,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:54,470 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:25:54,549 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-28 10:25:54,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:54,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:55,159 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:55,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-28 10:25:55,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-28 10:25:55,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-28 10:25:55,162 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:55,162 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-09-28 10:25:56,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:56,500 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-28 10:25:56,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-28 10:25:56,500 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-09-28 10:25:56,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:56,500 INFO L225 Difference]: With dead ends: 82 [2018-09-28 10:25:56,500 INFO L226 Difference]: Without dead ends: 80 [2018-09-28 10:25:56,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:56,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-28 10:25:56,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-28 10:25:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-28 10:25:56,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-28 10:25:56,502 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-28 10:25:56,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:56,503 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-28 10:25:56,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-28 10:25:56,503 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-28 10:25:56,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-28 10:25:56,503 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:56,503 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-28 10:25:56,503 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:56,503 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:56,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1115885629, now seen corresponding path program 76 times [2018-09-28 10:25:56,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:56,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:56,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:56,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:56,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:56,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:56,888 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:56,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:56,896 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:25:56,963 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:25:56,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:56,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:57,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:57,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-28 10:25:57,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-28 10:25:57,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-28 10:25:57,182 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:57,182 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-09-28 10:25:58,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:58,062 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-28 10:25:58,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-28 10:25:58,062 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-09-28 10:25:58,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:58,063 INFO L225 Difference]: With dead ends: 83 [2018-09-28 10:25:58,063 INFO L226 Difference]: Without dead ends: 81 [2018-09-28 10:25:58,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:58,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-28 10:25:58,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-28 10:25:58,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-28 10:25:58,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-28 10:25:58,065 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-28 10:25:58,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:58,065 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-28 10:25:58,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-28 10:25:58,065 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-28 10:25:58,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-28 10:25:58,066 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:58,066 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-28 10:25:58,066 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:58,066 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:58,066 INFO L82 PathProgramCache]: Analyzing trace with hash -232714324, now seen corresponding path program 77 times [2018-09-28 10:25:58,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:58,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:58,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:58,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:58,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:58,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:58,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:58,521 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:58,528 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:25:58,674 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-28 10:25:58,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:25:58,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:25:58,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:58,846 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:25:58,846 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-28 10:25:58,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-28 10:25:58,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-28 10:25:58,848 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:25:58,848 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-09-28 10:25:59,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:25:59,455 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-28 10:25:59,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-28 10:25:59,455 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-09-28 10:25:59,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:25:59,456 INFO L225 Difference]: With dead ends: 84 [2018-09-28 10:25:59,456 INFO L226 Difference]: Without dead ends: 82 [2018-09-28 10:25:59,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:25:59,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-28 10:25:59,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-28 10:25:59,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-28 10:25:59,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-28 10:25:59,458 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-28 10:25:59,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:25:59,458 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-28 10:25:59,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-28 10:25:59,459 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-28 10:25:59,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-28 10:25:59,459 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:25:59,459 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-28 10:25:59,459 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:25:59,460 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:25:59,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1375792355, now seen corresponding path program 78 times [2018-09-28 10:25:59,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:25:59,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:25:59,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:59,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:25:59,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:25:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:25:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:25:59,841 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:25:59,841 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:25:59,848 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:26:00,294 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-28 10:26:00,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:00,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:00,709 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:00,709 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-28 10:26:00,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-28 10:26:00,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-28 10:26:00,711 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:00,711 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-09-28 10:26:01,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:01,149 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-28 10:26:01,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-28 10:26:01,149 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-09-28 10:26:01,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:01,150 INFO L225 Difference]: With dead ends: 85 [2018-09-28 10:26:01,150 INFO L226 Difference]: Without dead ends: 83 [2018-09-28 10:26:01,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:01,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-28 10:26:01,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-28 10:26:01,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-28 10:26:01,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-28 10:26:01,153 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-28 10:26:01,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:01,153 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-28 10:26:01,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-28 10:26:01,153 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-28 10:26:01,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-28 10:26:01,153 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:01,154 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-28 10:26:01,154 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:01,154 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:01,154 INFO L82 PathProgramCache]: Analyzing trace with hash -300108148, now seen corresponding path program 79 times [2018-09-28 10:26:01,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:01,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:01,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:01,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:01,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:01,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:01,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:01,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:01,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:26:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:01,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:01,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:01,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-28 10:26:01,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-28 10:26:01,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-28 10:26:01,940 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:01,940 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-09-28 10:26:02,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:02,530 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-28 10:26:02,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-28 10:26:02,530 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-09-28 10:26:02,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:02,530 INFO L225 Difference]: With dead ends: 86 [2018-09-28 10:26:02,531 INFO L226 Difference]: Without dead ends: 84 [2018-09-28 10:26:02,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:02,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-28 10:26:02,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-28 10:26:02,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-28 10:26:02,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-28 10:26:02,533 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-28 10:26:02,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:02,533 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-28 10:26:02,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-28 10:26:02,534 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-28 10:26:02,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-28 10:26:02,534 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:02,534 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-28 10:26:02,534 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:02,534 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:02,534 INFO L82 PathProgramCache]: Analyzing trace with hash -713416189, now seen corresponding path program 80 times [2018-09-28 10:26:02,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:02,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:02,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:02,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:26:02,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:03,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:03,257 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:03,264 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:26:03,326 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:26:03,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:03,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:03,526 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:03,527 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-28 10:26:03,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-28 10:26:03,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-28 10:26:03,528 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:03,528 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-09-28 10:26:04,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:04,185 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-28 10:26:04,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-28 10:26:04,185 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-09-28 10:26:04,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:04,186 INFO L225 Difference]: With dead ends: 87 [2018-09-28 10:26:04,186 INFO L226 Difference]: Without dead ends: 85 [2018-09-28 10:26:04,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:04,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-28 10:26:04,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-28 10:26:04,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-28 10:26:04,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-28 10:26:04,188 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-28 10:26:04,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:04,188 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-28 10:26:04,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-28 10:26:04,188 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-28 10:26:04,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-28 10:26:04,189 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:04,189 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-28 10:26:04,189 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:04,189 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:04,189 INFO L82 PathProgramCache]: Analyzing trace with hash -641063572, now seen corresponding path program 81 times [2018-09-28 10:26:04,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:04,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:04,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:04,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:04,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:04,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:04,848 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:04,856 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:26:04,942 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-28 10:26:04,943 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:04,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:05,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:05,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-28 10:26:05,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-28 10:26:05,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-28 10:26:05,153 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:05,153 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-09-28 10:26:05,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:05,700 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-28 10:26:05,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-28 10:26:05,700 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-09-28 10:26:05,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:05,701 INFO L225 Difference]: With dead ends: 88 [2018-09-28 10:26:05,701 INFO L226 Difference]: Without dead ends: 86 [2018-09-28 10:26:05,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:05,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-28 10:26:05,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-28 10:26:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-28 10:26:05,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-28 10:26:05,703 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-28 10:26:05,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:05,703 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-28 10:26:05,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-28 10:26:05,704 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-28 10:26:05,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-28 10:26:05,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:05,704 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-28 10:26:05,705 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:05,705 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:05,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1601867555, now seen corresponding path program 82 times [2018-09-28 10:26:05,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:05,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:05,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:05,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:05,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:06,270 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:06,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:06,278 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:26:06,341 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:26:06,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:06,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:06,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:06,684 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:06,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-28 10:26:06,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-28 10:26:06,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-28 10:26:06,687 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:06,687 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-09-28 10:26:07,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:07,608 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-28 10:26:07,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-28 10:26:07,608 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-09-28 10:26:07,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:07,608 INFO L225 Difference]: With dead ends: 89 [2018-09-28 10:26:07,609 INFO L226 Difference]: Without dead ends: 87 [2018-09-28 10:26:07,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:07,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-28 10:26:07,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-28 10:26:07,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-28 10:26:07,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-28 10:26:07,611 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-28 10:26:07,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:07,611 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-28 10:26:07,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-28 10:26:07,611 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-28 10:26:07,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-28 10:26:07,612 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:07,612 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-28 10:26:07,612 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:07,612 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:07,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1881711540, now seen corresponding path program 83 times [2018-09-28 10:26:07,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:07,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:07,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:07,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:07,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:08,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:08,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:08,266 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:26:08,360 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-28 10:26:08,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:08,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:08,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:08,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-28 10:26:08,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-28 10:26:08,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-28 10:26:08,557 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:08,558 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-09-28 10:26:09,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:09,255 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-28 10:26:09,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-28 10:26:09,255 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-09-28 10:26:09,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:09,256 INFO L225 Difference]: With dead ends: 90 [2018-09-28 10:26:09,256 INFO L226 Difference]: Without dead ends: 88 [2018-09-28 10:26:09,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:09,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-28 10:26:09,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-28 10:26:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-28 10:26:09,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-28 10:26:09,259 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-28 10:26:09,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:09,259 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-28 10:26:09,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-28 10:26:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-28 10:26:09,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-28 10:26:09,260 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:09,260 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-28 10:26:09,260 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:09,260 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:09,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1796486211, now seen corresponding path program 84 times [2018-09-28 10:26:09,260 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:09,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:09,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:09,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:09,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:09,701 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:09,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:09,711 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:26:09,800 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-28 10:26:09,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:09,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:09,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:09,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-28 10:26:09,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-28 10:26:09,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-28 10:26:09,994 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:09,994 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-09-28 10:26:10,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:10,567 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-28 10:26:10,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-28 10:26:10,568 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-09-28 10:26:10,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:10,568 INFO L225 Difference]: With dead ends: 91 [2018-09-28 10:26:10,568 INFO L226 Difference]: Without dead ends: 89 [2018-09-28 10:26:10,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:10,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-28 10:26:10,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-28 10:26:10,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-28 10:26:10,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-28 10:26:10,571 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-28 10:26:10,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:10,571 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-28 10:26:10,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-28 10:26:10,571 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-28 10:26:10,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-28 10:26:10,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:10,572 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-28 10:26:10,572 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:10,572 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:10,572 INFO L82 PathProgramCache]: Analyzing trace with hash -143500500, now seen corresponding path program 85 times [2018-09-28 10:26:10,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:10,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:10,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:10,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:10,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:10,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:10,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:11,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:26:11,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:11,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:11,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:11,269 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:11,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-28 10:26:11,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-28 10:26:11,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-28 10:26:11,271 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:11,271 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-09-28 10:26:11,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:11,804 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-28 10:26:11,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-28 10:26:11,804 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-09-28 10:26:11,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:11,805 INFO L225 Difference]: With dead ends: 92 [2018-09-28 10:26:11,805 INFO L226 Difference]: Without dead ends: 90 [2018-09-28 10:26:11,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:11,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-28 10:26:11,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-28 10:26:11,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-28 10:26:11,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-28 10:26:11,808 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-28 10:26:11,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:11,808 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-28 10:26:11,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-28 10:26:11,808 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-28 10:26:11,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-28 10:26:11,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:11,809 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-28 10:26:11,809 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:11,809 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:11,809 INFO L82 PathProgramCache]: Analyzing trace with hash -153546397, now seen corresponding path program 86 times [2018-09-28 10:26:11,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:11,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:11,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:11,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:26:11,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:12,396 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:12,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:12,403 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:26:12,470 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:26:12,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:12,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:12,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:12,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-28 10:26:12,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-28 10:26:12,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-28 10:26:12,681 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:12,681 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-09-28 10:26:13,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:13,348 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-28 10:26:13,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-28 10:26:13,349 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-09-28 10:26:13,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:13,349 INFO L225 Difference]: With dead ends: 93 [2018-09-28 10:26:13,349 INFO L226 Difference]: Without dead ends: 91 [2018-09-28 10:26:13,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:13,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-28 10:26:13,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-28 10:26:13,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-28 10:26:13,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-28 10:26:13,351 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-28 10:26:13,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:13,352 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-28 10:26:13,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-28 10:26:13,352 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-28 10:26:13,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-28 10:26:13,352 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:13,352 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-28 10:26:13,352 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:13,352 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:13,353 INFO L82 PathProgramCache]: Analyzing trace with hash -464969204, now seen corresponding path program 87 times [2018-09-28 10:26:13,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:13,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:13,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:13,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:13,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:13,791 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:13,791 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:13,802 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:26:13,898 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-28 10:26:13,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:13,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:14,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:14,097 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:14,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-28 10:26:14,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-28 10:26:14,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-28 10:26:14,099 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:14,100 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-09-28 10:26:14,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:14,614 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-28 10:26:14,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-28 10:26:14,615 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-09-28 10:26:14,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:14,615 INFO L225 Difference]: With dead ends: 94 [2018-09-28 10:26:14,615 INFO L226 Difference]: Without dead ends: 92 [2018-09-28 10:26:14,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:14,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-28 10:26:14,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-28 10:26:14,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-28 10:26:14,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-28 10:26:14,617 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-28 10:26:14,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:14,617 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-28 10:26:14,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-28 10:26:14,618 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-28 10:26:14,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-28 10:26:14,618 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:14,618 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-28 10:26:14,618 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:14,618 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:14,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1529141629, now seen corresponding path program 88 times [2018-09-28 10:26:14,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:14,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:14,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:14,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:14,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:15,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:15,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:15,098 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:26:15,167 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:26:15,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:15,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:15,376 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:15,376 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-28 10:26:15,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-28 10:26:15,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-28 10:26:15,378 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:15,378 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-09-28 10:26:15,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:15,909 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-28 10:26:15,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-28 10:26:15,909 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-09-28 10:26:15,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:15,910 INFO L225 Difference]: With dead ends: 95 [2018-09-28 10:26:15,910 INFO L226 Difference]: Without dead ends: 93 [2018-09-28 10:26:15,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:15,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-28 10:26:15,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-28 10:26:15,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-28 10:26:15,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-28 10:26:15,912 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-28 10:26:15,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:15,912 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-28 10:26:15,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-28 10:26:15,912 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-28 10:26:15,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-28 10:26:15,913 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:15,913 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-28 10:26:15,913 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:15,913 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:15,913 INFO L82 PathProgramCache]: Analyzing trace with hash -158748436, now seen corresponding path program 89 times [2018-09-28 10:26:15,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:15,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:15,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:15,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:15,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:16,382 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:16,382 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:16,389 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:26:16,489 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-28 10:26:16,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:16,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:16,701 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:16,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-28 10:26:16,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-28 10:26:16,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-28 10:26:16,703 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:16,703 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-09-28 10:26:17,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:17,263 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-28 10:26:17,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-28 10:26:17,263 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-09-28 10:26:17,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:17,264 INFO L225 Difference]: With dead ends: 96 [2018-09-28 10:26:17,264 INFO L226 Difference]: Without dead ends: 94 [2018-09-28 10:26:17,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:17,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-28 10:26:17,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-28 10:26:17,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-28 10:26:17,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-28 10:26:17,266 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-28 10:26:17,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:17,266 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-28 10:26:17,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-28 10:26:17,266 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-28 10:26:17,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-28 10:26:17,267 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:17,267 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-28 10:26:17,267 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:17,267 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:17,267 INFO L82 PathProgramCache]: Analyzing trace with hash -626232413, now seen corresponding path program 90 times [2018-09-28 10:26:17,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:17,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:17,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:17,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:17,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:17,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:17,730 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:17,737 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:26:17,830 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-28 10:26:17,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:17,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:18,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:18,065 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-28 10:26:18,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-28 10:26:18,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-28 10:26:18,066 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:18,066 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-09-28 10:26:18,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:18,907 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-28 10:26:18,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-28 10:26:18,907 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-09-28 10:26:18,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:18,908 INFO L225 Difference]: With dead ends: 97 [2018-09-28 10:26:18,908 INFO L226 Difference]: Without dead ends: 95 [2018-09-28 10:26:18,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:18,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-28 10:26:18,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-28 10:26:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-28 10:26:18,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-28 10:26:18,911 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-28 10:26:18,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:18,911 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-28 10:26:18,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-28 10:26:18,911 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-28 10:26:18,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-28 10:26:18,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:18,912 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-28 10:26:18,912 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:18,912 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:18,912 INFO L82 PathProgramCache]: Analyzing trace with hash 2061633484, now seen corresponding path program 91 times [2018-09-28 10:26:18,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:18,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:18,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:18,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:18,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:19,396 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:19,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:19,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:26:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:19,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:19,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:19,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-28 10:26:19,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-28 10:26:19,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-28 10:26:19,695 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:19,696 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-09-28 10:26:20,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:20,492 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-28 10:26:20,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-28 10:26:20,492 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-09-28 10:26:20,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:20,493 INFO L225 Difference]: With dead ends: 98 [2018-09-28 10:26:20,493 INFO L226 Difference]: Without dead ends: 96 [2018-09-28 10:26:20,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:20,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-28 10:26:20,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-28 10:26:20,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-28 10:26:20,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-28 10:26:20,495 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-28 10:26:20,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:20,495 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-28 10:26:20,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-28 10:26:20,495 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-28 10:26:20,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-28 10:26:20,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:20,496 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-28 10:26:20,496 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:20,496 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:20,496 INFO L82 PathProgramCache]: Analyzing trace with hash -513869629, now seen corresponding path program 92 times [2018-09-28 10:26:20,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:20,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:20,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:20,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:26:20,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:20,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:20,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:20,996 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:26:21,071 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:26:21,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:21,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:21,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:21,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:21,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-28 10:26:21,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-28 10:26:21,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-28 10:26:21,343 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:21,343 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-09-28 10:26:21,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:21,918 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-28 10:26:21,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-28 10:26:21,918 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-09-28 10:26:21,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:21,919 INFO L225 Difference]: With dead ends: 99 [2018-09-28 10:26:21,919 INFO L226 Difference]: Without dead ends: 97 [2018-09-28 10:26:21,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:21,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-28 10:26:21,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-28 10:26:21,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-28 10:26:21,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-28 10:26:21,921 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-28 10:26:21,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:21,921 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-28 10:26:21,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-28 10:26:21,921 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-28 10:26:21,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-28 10:26:21,922 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:21,922 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-28 10:26:21,922 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:21,922 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:21,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1249912492, now seen corresponding path program 93 times [2018-09-28 10:26:21,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:21,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:21,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:21,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:21,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:22,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:22,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:22,713 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:26:22,815 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-28 10:26:22,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:22,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:23,039 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:23,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-28 10:26:23,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-28 10:26:23,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-28 10:26:23,042 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:23,042 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-09-28 10:26:23,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:23,895 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-28 10:26:23,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-28 10:26:23,895 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-09-28 10:26:23,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:23,896 INFO L225 Difference]: With dead ends: 100 [2018-09-28 10:26:23,896 INFO L226 Difference]: Without dead ends: 98 [2018-09-28 10:26:23,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:23,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-28 10:26:23,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-28 10:26:23,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-28 10:26:23,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-28 10:26:23,898 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-28 10:26:23,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:23,898 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-28 10:26:23,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-28 10:26:23,898 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-28 10:26:23,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-28 10:26:23,898 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:23,899 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-28 10:26:23,899 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:23,899 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:23,899 INFO L82 PathProgramCache]: Analyzing trace with hash 92583395, now seen corresponding path program 94 times [2018-09-28 10:26:23,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:23,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:23,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:23,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:23,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:24,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:24,392 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:24,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:24,399 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:26:24,471 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:26:24,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:24,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:24,695 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:24,695 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-28 10:26:24,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-28 10:26:24,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-28 10:26:24,697 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:24,697 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-09-28 10:26:25,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:25,320 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-28 10:26:25,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-28 10:26:25,320 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-09-28 10:26:25,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:25,320 INFO L225 Difference]: With dead ends: 101 [2018-09-28 10:26:25,321 INFO L226 Difference]: Without dead ends: 99 [2018-09-28 10:26:25,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:25,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-28 10:26:25,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-28 10:26:25,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-28 10:26:25,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-28 10:26:25,323 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-28 10:26:25,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:25,323 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-28 10:26:25,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-28 10:26:25,323 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-28 10:26:25,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-28 10:26:25,323 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:25,324 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-28 10:26:25,324 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:25,324 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:25,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1424880244, now seen corresponding path program 95 times [2018-09-28 10:26:25,324 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:25,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:25,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:25,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:25,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:25,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:25,843 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:25,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:25,851 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:26:25,970 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-28 10:26:25,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:25,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:26,194 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:26,194 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-28 10:26:26,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-28 10:26:26,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-28 10:26:26,196 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:26,196 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-09-28 10:26:27,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:27,035 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-28 10:26:27,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-28 10:26:27,036 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-09-28 10:26:27,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:27,036 INFO L225 Difference]: With dead ends: 102 [2018-09-28 10:26:27,036 INFO L226 Difference]: Without dead ends: 100 [2018-09-28 10:26:27,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:27,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-28 10:26:27,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-28 10:26:27,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-28 10:26:27,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-28 10:26:27,038 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-28 10:26:27,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:27,039 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-28 10:26:27,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-28 10:26:27,039 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-28 10:26:27,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-28 10:26:27,039 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:27,039 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-28 10:26:27,039 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:27,040 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:27,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1221612797, now seen corresponding path program 96 times [2018-09-28 10:26:27,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:27,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:27,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:27,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:27,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:27,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:27,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:27,591 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:26:27,699 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-28 10:26:27,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:27,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:27,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:27,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-28 10:26:27,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-28 10:26:27,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-28 10:26:27,931 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:27,931 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-09-28 10:26:28,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:28,746 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-28 10:26:28,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-28 10:26:28,747 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-09-28 10:26:28,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:28,747 INFO L225 Difference]: With dead ends: 103 [2018-09-28 10:26:28,747 INFO L226 Difference]: Without dead ends: 101 [2018-09-28 10:26:28,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:28,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-28 10:26:28,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-28 10:26:28,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-28 10:26:28,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-28 10:26:28,750 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-28 10:26:28,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:28,750 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-28 10:26:28,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-28 10:26:28,751 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-28 10:26:28,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-28 10:26:28,751 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:28,751 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-28 10:26:28,751 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:28,751 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:28,751 INFO L82 PathProgramCache]: Analyzing trace with hash 784710764, now seen corresponding path program 97 times [2018-09-28 10:26:28,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:28,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:28,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:28,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:28,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:29,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:29,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:29,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:26:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:29,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:29,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:29,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-28 10:26:29,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-28 10:26:29,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-28 10:26:29,745 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:29,745 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-09-28 10:26:30,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:30,446 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-28 10:26:30,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-28 10:26:30,447 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-09-28 10:26:30,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:30,448 INFO L225 Difference]: With dead ends: 104 [2018-09-28 10:26:30,448 INFO L226 Difference]: Without dead ends: 102 [2018-09-28 10:26:30,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:30,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-28 10:26:30,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-28 10:26:30,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-28 10:26:30,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-28 10:26:30,451 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-28 10:26:30,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:30,451 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-28 10:26:30,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-28 10:26:30,451 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-28 10:26:30,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-28 10:26:30,451 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:30,452 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-28 10:26:30,452 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:30,452 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:30,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1443768285, now seen corresponding path program 98 times [2018-09-28 10:26:30,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:30,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:30,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:30,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:26:30,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:30,976 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:30,976 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:30,983 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:26:31,059 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:26:31,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:31,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:31,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:31,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-28 10:26:31,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-28 10:26:31,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-28 10:26:31,291 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:31,291 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-09-28 10:26:32,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:32,269 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-28 10:26:32,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-28 10:26:32,269 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-09-28 10:26:32,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:32,270 INFO L225 Difference]: With dead ends: 105 [2018-09-28 10:26:32,270 INFO L226 Difference]: Without dead ends: 103 [2018-09-28 10:26:32,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:32,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-28 10:26:32,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-28 10:26:32,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-28 10:26:32,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-28 10:26:32,273 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-28 10:26:32,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:32,273 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-28 10:26:32,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-28 10:26:32,273 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-28 10:26:32,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-28 10:26:32,273 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:32,274 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-28 10:26:32,274 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:32,274 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:32,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1807142068, now seen corresponding path program 99 times [2018-09-28 10:26:32,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:32,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:32,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:32,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:32,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:32,836 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:32,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:32,843 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:26:32,959 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-28 10:26:32,960 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:32,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:33,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:33,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-28 10:26:33,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-28 10:26:33,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-28 10:26:33,199 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:33,199 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-09-28 10:26:34,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:34,321 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-28 10:26:34,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-28 10:26:34,321 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-09-28 10:26:34,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:34,322 INFO L225 Difference]: With dead ends: 106 [2018-09-28 10:26:34,322 INFO L226 Difference]: Without dead ends: 104 [2018-09-28 10:26:34,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:34,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-28 10:26:34,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-28 10:26:34,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-28 10:26:34,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-28 10:26:34,325 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-28 10:26:34,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:34,325 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-28 10:26:34,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-28 10:26:34,325 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-28 10:26:34,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-28 10:26:34,325 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:34,326 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-28 10:26:34,326 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:34,326 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:34,326 INFO L82 PathProgramCache]: Analyzing trace with hash -186827453, now seen corresponding path program 100 times [2018-09-28 10:26:34,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:34,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:34,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:34,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:34,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:34,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:34,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:34,911 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:26:34,991 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:26:34,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:34,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:35,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:35,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-28 10:26:35,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-28 10:26:35,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-28 10:26:35,235 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:35,235 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-09-28 10:26:36,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:36,265 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-28 10:26:36,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-28 10:26:36,265 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-09-28 10:26:36,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:36,266 INFO L225 Difference]: With dead ends: 107 [2018-09-28 10:26:36,266 INFO L226 Difference]: Without dead ends: 105 [2018-09-28 10:26:36,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:36,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-28 10:26:36,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-28 10:26:36,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-28 10:26:36,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-28 10:26:36,276 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-28 10:26:36,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:36,276 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-28 10:26:36,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-28 10:26:36,277 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-28 10:26:36,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-28 10:26:36,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:36,277 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-28 10:26:36,278 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:36,278 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:36,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1496681940, now seen corresponding path program 101 times [2018-09-28 10:26:36,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:36,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:36,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:36,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:36,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:36,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:36,894 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:36,901 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:26:37,035 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-28 10:26:37,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:37,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:37,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:37,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:37,286 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-28 10:26:37,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-28 10:26:37,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-28 10:26:37,289 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:37,289 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-09-28 10:26:38,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:38,267 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-28 10:26:38,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-28 10:26:38,268 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-09-28 10:26:38,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:38,269 INFO L225 Difference]: With dead ends: 108 [2018-09-28 10:26:38,269 INFO L226 Difference]: Without dead ends: 106 [2018-09-28 10:26:38,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:38,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-28 10:26:38,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-28 10:26:38,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-28 10:26:38,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-28 10:26:38,281 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-28 10:26:38,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:38,281 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-28 10:26:38,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-28 10:26:38,281 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-28 10:26:38,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-28 10:26:38,282 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:38,282 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-28 10:26:38,282 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:38,282 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:38,283 INFO L82 PathProgramCache]: Analyzing trace with hash 847501923, now seen corresponding path program 102 times [2018-09-28 10:26:38,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:38,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:38,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:38,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:38,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:39,183 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:39,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:39,190 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:26:39,302 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-28 10:26:39,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:39,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:39,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:39,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:39,548 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-28 10:26:39,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-28 10:26:39,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-28 10:26:39,550 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:39,550 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-09-28 10:26:40,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:40,611 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-28 10:26:40,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-28 10:26:40,612 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-09-28 10:26:40,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:40,612 INFO L225 Difference]: With dead ends: 109 [2018-09-28 10:26:40,612 INFO L226 Difference]: Without dead ends: 107 [2018-09-28 10:26:40,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:40,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-28 10:26:40,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-28 10:26:40,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-28 10:26:40,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-28 10:26:40,615 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-28 10:26:40,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:40,616 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-28 10:26:40,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-28 10:26:40,616 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-28 10:26:40,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-28 10:26:40,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:40,617 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-28 10:26:40,617 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:40,617 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:40,617 INFO L82 PathProgramCache]: Analyzing trace with hash 502757644, now seen corresponding path program 103 times [2018-09-28 10:26:40,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:40,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:40,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:40,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:40,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:41,227 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:41,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:41,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:26:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:41,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:41,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:41,644 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:41,644 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-28 10:26:41,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-28 10:26:41,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-28 10:26:41,647 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:41,647 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-09-28 10:26:42,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:42,402 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-28 10:26:42,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-28 10:26:42,402 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-09-28 10:26:42,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:42,403 INFO L225 Difference]: With dead ends: 110 [2018-09-28 10:26:42,403 INFO L226 Difference]: Without dead ends: 108 [2018-09-28 10:26:42,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:42,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-28 10:26:42,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-28 10:26:42,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-28 10:26:42,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-28 10:26:42,405 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-28 10:26:42,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:42,405 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-28 10:26:42,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-28 10:26:42,406 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-28 10:26:42,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-28 10:26:42,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:42,406 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-28 10:26:42,406 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:42,406 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:42,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1594380413, now seen corresponding path program 104 times [2018-09-28 10:26:42,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:42,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:42,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:42,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:26:42,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:43,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:43,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:43,014 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:26:43,096 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:26:43,097 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:43,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:43,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:43,448 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-28 10:26:43,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-28 10:26:43,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-28 10:26:43,450 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:43,450 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-09-28 10:26:44,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:44,457 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-28 10:26:44,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-28 10:26:44,458 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-09-28 10:26:44,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:44,458 INFO L225 Difference]: With dead ends: 111 [2018-09-28 10:26:44,458 INFO L226 Difference]: Without dead ends: 109 [2018-09-28 10:26:44,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:44,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-28 10:26:44,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-28 10:26:44,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-28 10:26:44,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-28 10:26:44,461 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-28 10:26:44,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:44,461 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-28 10:26:44,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-28 10:26:44,461 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-28 10:26:44,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-28 10:26:44,462 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:44,462 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-28 10:26:44,462 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:44,462 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:44,462 INFO L82 PathProgramCache]: Analyzing trace with hash 2113816556, now seen corresponding path program 105 times [2018-09-28 10:26:44,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:44,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:44,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:44,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:44,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:45,047 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:45,047 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:45,055 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:26:45,175 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-28 10:26:45,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:45,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:45,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:45,422 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-28 10:26:45,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-28 10:26:45,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-28 10:26:45,424 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:45,424 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-09-28 10:26:46,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:46,539 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-28 10:26:46,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-28 10:26:46,540 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-09-28 10:26:46,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:46,540 INFO L225 Difference]: With dead ends: 112 [2018-09-28 10:26:46,540 INFO L226 Difference]: Without dead ends: 110 [2018-09-28 10:26:46,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:46,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-28 10:26:46,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-28 10:26:46,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-28 10:26:46,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-28 10:26:46,542 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-28 10:26:46,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:46,543 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-28 10:26:46,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-28 10:26:46,543 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-28 10:26:46,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-28 10:26:46,543 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:46,543 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-28 10:26:46,544 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:46,544 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:46,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1103805603, now seen corresponding path program 106 times [2018-09-28 10:26:46,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:46,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:46,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:46,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:46,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:47,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:47,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:47,163 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:26:47,247 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:26:47,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:47,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:47,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:47,504 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-28 10:26:47,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-28 10:26:47,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-28 10:26:47,506 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:47,506 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-09-28 10:26:48,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:48,515 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-28 10:26:48,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-28 10:26:48,516 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-09-28 10:26:48,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:48,516 INFO L225 Difference]: With dead ends: 113 [2018-09-28 10:26:48,516 INFO L226 Difference]: Without dead ends: 111 [2018-09-28 10:26:48,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:48,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-28 10:26:48,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-28 10:26:48,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-28 10:26:48,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-28 10:26:48,519 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-28 10:26:48,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:48,519 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-28 10:26:48,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-28 10:26:48,519 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-28 10:26:48,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-28 10:26:48,519 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:48,519 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-28 10:26:48,520 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:48,520 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:48,520 INFO L82 PathProgramCache]: Analyzing trace with hash -141762868, now seen corresponding path program 107 times [2018-09-28 10:26:48,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:48,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:48,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:48,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:48,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:49,389 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:49,389 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:49,397 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:26:49,531 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-28 10:26:49,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:49,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:49,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:49,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-28 10:26:49,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-28 10:26:49,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-28 10:26:49,789 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:49,789 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-09-28 10:26:50,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:50,891 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-09-28 10:26:50,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-28 10:26:50,891 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-09-28 10:26:50,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:50,891 INFO L225 Difference]: With dead ends: 114 [2018-09-28 10:26:50,891 INFO L226 Difference]: Without dead ends: 112 [2018-09-28 10:26:50,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:50,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-28 10:26:50,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-28 10:26:50,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-28 10:26:50,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-28 10:26:50,894 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-09-28 10:26:50,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:50,894 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-28 10:26:50,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-28 10:26:50,895 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-28 10:26:50,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-28 10:26:50,895 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:50,895 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-09-28 10:26:50,895 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:50,896 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:50,896 INFO L82 PathProgramCache]: Analyzing trace with hash -99679805, now seen corresponding path program 108 times [2018-09-28 10:26:50,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:50,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:50,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:50,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:50,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:50,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:51,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:51,507 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:51,507 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:51,515 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:26:51,637 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-28 10:26:51,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:51,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:51,889 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:51,889 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-28 10:26:51,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-28 10:26:51,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-28 10:26:51,892 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:51,892 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-09-28 10:26:52,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:52,799 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-28 10:26:52,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-28 10:26:52,800 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-09-28 10:26:52,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:52,800 INFO L225 Difference]: With dead ends: 115 [2018-09-28 10:26:52,800 INFO L226 Difference]: Without dead ends: 113 [2018-09-28 10:26:52,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:52,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-28 10:26:52,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-28 10:26:52,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-28 10:26:52,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-28 10:26:52,803 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-09-28 10:26:52,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:52,804 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-28 10:26:52,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-28 10:26:52,804 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-28 10:26:52,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-28 10:26:52,804 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:52,805 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-09-28 10:26:52,805 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:52,805 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:52,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1204895148, now seen corresponding path program 109 times [2018-09-28 10:26:52,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:52,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:52,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:52,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:52,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:53,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:53,414 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:53,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:26:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:53,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:53,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:53,768 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-28 10:26:53,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-28 10:26:53,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-28 10:26:53,771 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:53,771 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-09-28 10:26:55,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:55,133 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-09-28 10:26:55,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-28 10:26:55,133 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-09-28 10:26:55,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:55,134 INFO L225 Difference]: With dead ends: 116 [2018-09-28 10:26:55,134 INFO L226 Difference]: Without dead ends: 114 [2018-09-28 10:26:55,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:55,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-28 10:26:55,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-28 10:26:55,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-28 10:26:55,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-28 10:26:55,136 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-09-28 10:26:55,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:55,137 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-28 10:26:55,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-28 10:26:55,137 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-28 10:26:55,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-28 10:26:55,137 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:55,138 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-09-28 10:26:55,138 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:55,138 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:55,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1302954269, now seen corresponding path program 110 times [2018-09-28 10:26:55,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:55,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:55,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:55,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:26:55,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:55,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:55,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:55,816 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:26:55,901 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:26:55,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:55,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:56,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:56,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-28 10:26:56,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-28 10:26:56,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-28 10:26:56,173 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:56,173 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-09-28 10:26:57,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:57,344 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-28 10:26:57,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-28 10:26:57,344 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-09-28 10:26:57,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:57,345 INFO L225 Difference]: With dead ends: 117 [2018-09-28 10:26:57,345 INFO L226 Difference]: Without dead ends: 115 [2018-09-28 10:26:57,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:57,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-28 10:26:57,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-28 10:26:57,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-28 10:26:57,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-28 10:26:57,347 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-09-28 10:26:57,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:57,348 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-28 10:26:57,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-28 10:26:57,348 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-28 10:26:57,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-28 10:26:57,348 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:57,349 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-09-28 10:26:57,349 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:57,349 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:57,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1736874868, now seen corresponding path program 111 times [2018-09-28 10:26:57,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:57,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:57,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:57,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:57,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:26:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:58,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:26:58,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:26:58,064 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:26:58,236 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-09-28 10:26:58,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:26:58,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:26:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:26:58,519 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:26:58,519 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-28 10:26:58,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-28 10:26:58,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-28 10:26:58,522 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:26:58,522 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 114 states. [2018-09-28 10:26:59,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:26:59,660 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-09-28 10:26:59,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-28 10:26:59,660 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-09-28 10:26:59,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:26:59,660 INFO L225 Difference]: With dead ends: 118 [2018-09-28 10:26:59,660 INFO L226 Difference]: Without dead ends: 116 [2018-09-28 10:26:59,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:26:59,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-28 10:26:59,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-28 10:26:59,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-28 10:26:59,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-28 10:26:59,663 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-09-28 10:26:59,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:26:59,663 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-28 10:26:59,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-28 10:26:59,664 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-28 10:26:59,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-28 10:26:59,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:26:59,664 INFO L375 BasicCegarLoop]: trace histogram [112, 1, 1, 1] [2018-09-28 10:26:59,664 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:26:59,664 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:26:59,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1991455747, now seen corresponding path program 112 times [2018-09-28 10:26:59,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:26:59,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:26:59,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:59,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:26:59,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:26:59,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:00,327 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:27:00,327 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:27:00,334 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:27:00,418 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:27:00,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:27:00,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:27:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:00,737 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:27:00,737 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-09-28 10:27:00,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-09-28 10:27:00,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-09-28 10:27:00,741 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:27:00,741 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 115 states. [2018-09-28 10:27:01,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:27:01,788 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-28 10:27:01,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-28 10:27:01,788 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 115 [2018-09-28 10:27:01,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:27:01,789 INFO L225 Difference]: With dead ends: 119 [2018-09-28 10:27:01,789 INFO L226 Difference]: Without dead ends: 117 [2018-09-28 10:27:01,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:27:01,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-28 10:27:01,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-28 10:27:01,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-28 10:27:01,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-28 10:27:01,791 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2018-09-28 10:27:01,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:27:01,791 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-28 10:27:01,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-09-28 10:27:01,791 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-28 10:27:01,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-28 10:27:01,791 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:27:01,792 INFO L375 BasicCegarLoop]: trace histogram [113, 1, 1, 1] [2018-09-28 10:27:01,792 INFO L423 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:27:01,792 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:27:01,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1605587820, now seen corresponding path program 113 times [2018-09-28 10:27:01,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:27:01,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:27:01,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:01,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:27:01,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:02,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:02,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:27:02,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:27:02,584 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:27:02,730 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-09-28 10:27:02,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:27:02,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:27:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:03,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:27:03,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 115 [2018-09-28 10:27:03,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-28 10:27:03,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-28 10:27:03,164 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:27:03,165 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 116 states. [2018-09-28 10:27:04,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:27:04,202 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-09-28 10:27:04,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-28 10:27:04,202 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 116 [2018-09-28 10:27:04,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:27:04,203 INFO L225 Difference]: With dead ends: 120 [2018-09-28 10:27:04,203 INFO L226 Difference]: Without dead ends: 118 [2018-09-28 10:27:04,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:27:04,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-28 10:27:04,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-28 10:27:04,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-28 10:27:04,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-28 10:27:04,205 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2018-09-28 10:27:04,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:27:04,205 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-28 10:27:04,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-28 10:27:04,205 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-28 10:27:04,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-28 10:27:04,206 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:27:04,206 INFO L375 BasicCegarLoop]: trace histogram [114, 1, 1, 1] [2018-09-28 10:27:04,206 INFO L423 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:27:04,206 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:27:04,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1766383325, now seen corresponding path program 114 times [2018-09-28 10:27:04,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:27:04,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:27:04,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:04,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:27:04,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:05,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:27:05,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:27:05,014 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:27:05,143 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2018-09-28 10:27:05,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:27:05,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:27:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:05,420 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:27:05,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 116 [2018-09-28 10:27:05,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-09-28 10:27:05,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-09-28 10:27:05,423 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:27:05,423 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 117 states. [2018-09-28 10:27:06,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:27:06,580 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-28 10:27:06,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-28 10:27:06,580 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 117 [2018-09-28 10:27:06,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:27:06,580 INFO L225 Difference]: With dead ends: 121 [2018-09-28 10:27:06,581 INFO L226 Difference]: Without dead ends: 119 [2018-09-28 10:27:06,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:27:06,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-28 10:27:06,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-28 10:27:06,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-28 10:27:06,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-28 10:27:06,583 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2018-09-28 10:27:06,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:27:06,583 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-28 10:27:06,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-09-28 10:27:06,583 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-28 10:27:06,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-28 10:27:06,584 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:27:06,584 INFO L375 BasicCegarLoop]: trace histogram [115, 1, 1, 1] [2018-09-28 10:27:06,584 INFO L423 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:27:06,584 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:27:06,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1076693580, now seen corresponding path program 115 times [2018-09-28 10:27:06,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:27:06,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:27:06,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:06,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:27:06,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:07,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:27:07,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:27:07,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:27:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:07,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:27:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:07,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:27:07,655 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 117 [2018-09-28 10:27:07,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-28 10:27:07,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-28 10:27:07,658 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:27:07,658 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 118 states. [2018-09-28 10:27:08,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:27:08,860 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-09-28 10:27:08,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-28 10:27:08,861 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 118 [2018-09-28 10:27:08,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:27:08,861 INFO L225 Difference]: With dead ends: 122 [2018-09-28 10:27:08,861 INFO L226 Difference]: Without dead ends: 120 [2018-09-28 10:27:08,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:27:08,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-28 10:27:08,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-28 10:27:08,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-28 10:27:08,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-28 10:27:08,863 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2018-09-28 10:27:08,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:27:08,864 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-28 10:27:08,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-28 10:27:08,864 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-28 10:27:08,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-28 10:27:08,864 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:27:08,864 INFO L375 BasicCegarLoop]: trace histogram [116, 1, 1, 1] [2018-09-28 10:27:08,865 INFO L423 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:27:08,865 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:27:08,865 INFO L82 PathProgramCache]: Analyzing trace with hash -982235581, now seen corresponding path program 116 times [2018-09-28 10:27:08,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:27:08,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:27:08,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:08,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:27:08,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:09,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:27:09,768 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:27:09,776 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:27:09,865 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:27:09,865 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:27:09,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:27:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:10,146 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:27:10,146 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 118 [2018-09-28 10:27:10,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-28 10:27:10,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-28 10:27:10,149 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:27:10,149 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 119 states. [2018-09-28 10:27:11,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:27:11,176 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-28 10:27:11,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-28 10:27:11,176 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 119 [2018-09-28 10:27:11,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:27:11,177 INFO L225 Difference]: With dead ends: 123 [2018-09-28 10:27:11,177 INFO L226 Difference]: Without dead ends: 121 [2018-09-28 10:27:11,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:27:11,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-28 10:27:11,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-28 10:27:11,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-28 10:27:11,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-28 10:27:11,179 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2018-09-28 10:27:11,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:27:11,179 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-28 10:27:11,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-28 10:27:11,179 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-28 10:27:11,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-28 10:27:11,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:27:11,180 INFO L375 BasicCegarLoop]: trace histogram [117, 1, 1, 1] [2018-09-28 10:27:11,180 INFO L423 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:27:11,180 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:27:11,180 INFO L82 PathProgramCache]: Analyzing trace with hash -384530132, now seen corresponding path program 117 times [2018-09-28 10:27:11,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:27:11,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:27:11,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:11,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:27:11,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:11,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:11,889 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:27:11,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:27:11,897 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:27:12,035 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-09-28 10:27:12,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:27:12,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:27:12,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:12,323 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:27:12,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 119 [2018-09-28 10:27:12,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-28 10:27:12,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-28 10:27:12,326 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:27:12,326 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 120 states. [2018-09-28 10:27:13,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:27:13,441 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-09-28 10:27:13,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-28 10:27:13,442 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 120 [2018-09-28 10:27:13,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:27:13,442 INFO L225 Difference]: With dead ends: 124 [2018-09-28 10:27:13,442 INFO L226 Difference]: Without dead ends: 122 [2018-09-28 10:27:13,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:27:13,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-28 10:27:13,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-28 10:27:13,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-28 10:27:13,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-28 10:27:13,445 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 120 [2018-09-28 10:27:13,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:27:13,445 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-28 10:27:13,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-28 10:27:13,445 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-28 10:27:13,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-28 10:27:13,445 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:27:13,446 INFO L375 BasicCegarLoop]: trace histogram [118, 1, 1, 1] [2018-09-28 10:27:13,446 INFO L423 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:27:13,446 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:27:13,446 INFO L82 PathProgramCache]: Analyzing trace with hash 964469603, now seen corresponding path program 118 times [2018-09-28 10:27:13,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:27:13,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:27:13,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:13,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:27:13,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:14,159 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:27:14,159 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:27:14,167 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:27:14,259 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:27:14,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:27:14,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:27:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:14,744 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:27:14,744 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 120 [2018-09-28 10:27:14,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-09-28 10:27:14,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-09-28 10:27:14,747 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:27:14,747 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 121 states. [2018-09-28 10:27:16,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:27:16,017 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-28 10:27:16,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-28 10:27:16,017 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 121 [2018-09-28 10:27:16,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:27:16,017 INFO L225 Difference]: With dead ends: 125 [2018-09-28 10:27:16,018 INFO L226 Difference]: Without dead ends: 123 [2018-09-28 10:27:16,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:27:16,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-28 10:27:16,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-28 10:27:16,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-28 10:27:16,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-28 10:27:16,020 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 121 [2018-09-28 10:27:16,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:27:16,021 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-28 10:27:16,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-09-28 10:27:16,021 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-28 10:27:16,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-28 10:27:16,021 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:27:16,022 INFO L375 BasicCegarLoop]: trace histogram [119, 1, 1, 1] [2018-09-28 10:27:16,022 INFO L423 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:27:16,022 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:27:16,022 INFO L82 PathProgramCache]: Analyzing trace with hash -166211572, now seen corresponding path program 119 times [2018-09-28 10:27:16,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:27:16,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:27:16,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:16,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:27:16,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:16,778 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:27:16,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:27:16,786 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:27:16,938 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-28 10:27:16,939 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:27:16,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:27:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:17,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:27:17,231 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 121 [2018-09-28 10:27:17,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-28 10:27:17,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-28 10:27:17,234 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:27:17,235 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 122 states. [2018-09-28 10:27:18,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:27:18,203 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-09-28 10:27:18,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-28 10:27:18,203 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 122 [2018-09-28 10:27:18,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:27:18,203 INFO L225 Difference]: With dead ends: 126 [2018-09-28 10:27:18,203 INFO L226 Difference]: Without dead ends: 124 [2018-09-28 10:27:18,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:27:18,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-28 10:27:18,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-28 10:27:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-28 10:27:18,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-28 10:27:18,206 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 122 [2018-09-28 10:27:18,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:27:18,206 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-28 10:27:18,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-28 10:27:18,207 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-28 10:27:18,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-28 10:27:18,207 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:27:18,207 INFO L375 BasicCegarLoop]: trace histogram [120, 1, 1, 1] [2018-09-28 10:27:18,208 INFO L423 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:27:18,208 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:27:18,208 INFO L82 PathProgramCache]: Analyzing trace with hash -857589629, now seen corresponding path program 120 times [2018-09-28 10:27:18,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:27:18,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:27:18,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:18,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:27:18,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:18,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:27:18,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:27:18,967 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:27:19,113 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-28 10:27:19,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:27:19,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:27:19,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:19,410 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:27:19,410 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 122 [2018-09-28 10:27:19,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-09-28 10:27:19,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-09-28 10:27:19,413 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:27:19,414 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 123 states. [2018-09-28 10:27:20,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:27:20,792 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-28 10:27:20,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-09-28 10:27:20,792 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 123 [2018-09-28 10:27:20,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:27:20,793 INFO L225 Difference]: With dead ends: 127 [2018-09-28 10:27:20,793 INFO L226 Difference]: Without dead ends: 125 [2018-09-28 10:27:20,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:27:20,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-28 10:27:20,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-28 10:27:20,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-28 10:27:20,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-28 10:27:20,795 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 123 [2018-09-28 10:27:20,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:27:20,795 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-28 10:27:20,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-09-28 10:27:20,795 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-28 10:27:20,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-28 10:27:20,796 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:27:20,796 INFO L375 BasicCegarLoop]: trace histogram [121, 1, 1, 1] [2018-09-28 10:27:20,796 INFO L423 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:27:20,796 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:27:20,796 INFO L82 PathProgramCache]: Analyzing trace with hash -815472916, now seen corresponding path program 121 times [2018-09-28 10:27:20,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:27:20,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:27:20,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:20,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:27:20,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:21,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:27:21,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:27:21,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:27:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:21,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:27:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:21,932 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:27:21,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 123 [2018-09-28 10:27:21,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-28 10:27:21,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-28 10:27:21,935 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:27:21,936 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 124 states. [2018-09-28 10:27:23,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:27:23,097 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-09-28 10:27:23,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-09-28 10:27:23,097 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 124 [2018-09-28 10:27:23,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:27:23,098 INFO L225 Difference]: With dead ends: 128 [2018-09-28 10:27:23,098 INFO L226 Difference]: Without dead ends: 126 [2018-09-28 10:27:23,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:27:23,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-28 10:27:23,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-28 10:27:23,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-28 10:27:23,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-28 10:27:23,101 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 124 [2018-09-28 10:27:23,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:27:23,101 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-28 10:27:23,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-28 10:27:23,101 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-28 10:27:23,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-28 10:27:23,102 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:27:23,102 INFO L375 BasicCegarLoop]: trace histogram [122, 1, 1, 1] [2018-09-28 10:27:23,102 INFO L423 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:27:23,102 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:27:23,102 INFO L82 PathProgramCache]: Analyzing trace with hash 490145187, now seen corresponding path program 122 times [2018-09-28 10:27:23,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:27:23,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:27:23,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:23,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:27:23,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:23,898 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:27:23,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:27:23,905 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:27:23,999 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:27:23,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:27:24,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:27:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:24,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:27:24,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 124 [2018-09-28 10:27:24,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-28 10:27:24,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-28 10:27:24,303 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:27:24,303 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 125 states. [2018-09-28 10:27:25,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:27:25,625 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-28 10:27:25,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-28 10:27:25,625 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 125 [2018-09-28 10:27:25,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:27:25,626 INFO L225 Difference]: With dead ends: 129 [2018-09-28 10:27:25,626 INFO L226 Difference]: Without dead ends: 127 [2018-09-28 10:27:25,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:27:25,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-28 10:27:25,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-28 10:27:25,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-28 10:27:25,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-28 10:27:25,628 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 125 [2018-09-28 10:27:25,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:27:25,628 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-28 10:27:25,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-28 10:27:25,628 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-28 10:27:25,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-28 10:27:25,629 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:27:25,629 INFO L375 BasicCegarLoop]: trace histogram [123, 1, 1, 1] [2018-09-28 10:27:25,629 INFO L423 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:27:25,629 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:27:25,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1985366580, now seen corresponding path program 123 times [2018-09-28 10:27:25,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:27:25,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:27:25,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:25,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:27:25,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:26,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:27:26,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:27:26,417 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:27:26,567 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-09-28 10:27:26,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:27:26,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:27:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:26,863 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:27:26,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 125 [2018-09-28 10:27:26,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-28 10:27:26,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-28 10:27:26,866 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:27:26,866 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 126 states. [2018-09-28 10:27:28,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:27:28,220 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-09-28 10:27:28,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-09-28 10:27:28,220 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 126 [2018-09-28 10:27:28,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:27:28,221 INFO L225 Difference]: With dead ends: 130 [2018-09-28 10:27:28,221 INFO L226 Difference]: Without dead ends: 128 [2018-09-28 10:27:28,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:27:28,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-28 10:27:28,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-28 10:27:28,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-28 10:27:28,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-28 10:27:28,223 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 126 [2018-09-28 10:27:28,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:27:28,223 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-28 10:27:28,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-28 10:27:28,223 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-28 10:27:28,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-28 10:27:28,223 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:27:28,224 INFO L375 BasicCegarLoop]: trace histogram [124, 1, 1, 1] [2018-09-28 10:27:28,224 INFO L423 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:27:28,224 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:27:28,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1416820029, now seen corresponding path program 124 times [2018-09-28 10:27:28,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:27:28,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:27:28,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:28,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:27:28,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:28,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:27:28,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:27:28,977 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:27:29,074 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:27:29,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:27:29,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:27:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:29,400 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:27:29,401 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 126 [2018-09-28 10:27:29,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-09-28 10:27:29,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-09-28 10:27:29,403 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:27:29,403 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 127 states. [2018-09-28 10:27:30,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:27:30,698 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-28 10:27:30,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-28 10:27:30,698 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 127 [2018-09-28 10:27:30,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:27:30,698 INFO L225 Difference]: With dead ends: 131 [2018-09-28 10:27:30,699 INFO L226 Difference]: Without dead ends: 129 [2018-09-28 10:27:30,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:27:30,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-28 10:27:30,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-28 10:27:30,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-28 10:27:30,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-28 10:27:30,701 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 127 [2018-09-28 10:27:30,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:27:30,701 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-28 10:27:30,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-09-28 10:27:30,701 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-28 10:27:30,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-28 10:27:30,702 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:27:30,702 INFO L375 BasicCegarLoop]: trace histogram [125, 1, 1, 1] [2018-09-28 10:27:30,702 INFO L423 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:27:30,702 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:27:30,702 INFO L82 PathProgramCache]: Analyzing trace with hash -971746132, now seen corresponding path program 125 times [2018-09-28 10:27:30,702 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:27:30,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:27:30,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:30,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:27:30,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:31,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:27:31,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:27:31,498 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:27:31,664 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-09-28 10:27:31,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:27:31,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:27:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:31,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:27:31,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 127 [2018-09-28 10:27:31,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-28 10:27:31,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-28 10:27:31,976 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:27:31,976 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 128 states. [2018-09-28 10:27:33,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:27:33,249 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-09-28 10:27:33,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-28 10:27:33,249 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 128 [2018-09-28 10:27:33,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:27:33,250 INFO L225 Difference]: With dead ends: 132 [2018-09-28 10:27:33,250 INFO L226 Difference]: Without dead ends: 130 [2018-09-28 10:27:33,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:27:33,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-28 10:27:33,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-28 10:27:33,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-28 10:27:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-28 10:27:33,252 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 128 [2018-09-28 10:27:33,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:27:33,252 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-28 10:27:33,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-28 10:27:33,252 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-28 10:27:33,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-28 10:27:33,253 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:27:33,253 INFO L375 BasicCegarLoop]: trace histogram [126, 1, 1, 1] [2018-09-28 10:27:33,253 INFO L423 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:27:33,253 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:27:33,253 INFO L82 PathProgramCache]: Analyzing trace with hash -59357213, now seen corresponding path program 126 times [2018-09-28 10:27:33,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:27:33,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:27:33,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:33,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:27:33,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:34,060 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:27:34,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:27:34,067 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:27:34,219 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2018-09-28 10:27:34,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:27:34,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:27:34,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:34,531 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:27:34,531 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 128 [2018-09-28 10:27:34,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-09-28 10:27:34,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-09-28 10:27:34,534 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:27:34,534 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 129 states. [2018-09-28 10:27:35,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:27:35,864 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-28 10:27:35,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-28 10:27:35,865 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 129 [2018-09-28 10:27:35,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:27:35,865 INFO L225 Difference]: With dead ends: 133 [2018-09-28 10:27:35,865 INFO L226 Difference]: Without dead ends: 131 [2018-09-28 10:27:35,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:27:35,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-28 10:27:35,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-28 10:27:35,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-28 10:27:35,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-28 10:27:35,868 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 129 [2018-09-28 10:27:35,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:27:35,868 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-28 10:27:35,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-09-28 10:27:35,869 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-28 10:27:35,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-28 10:27:35,869 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:27:35,869 INFO L375 BasicCegarLoop]: trace histogram [127, 1, 1, 1] [2018-09-28 10:27:35,870 INFO L423 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:27:35,870 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:27:35,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1840071796, now seen corresponding path program 127 times [2018-09-28 10:27:35,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:27:35,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:27:35,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:35,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:27:35,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:36,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:36,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:27:36,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:27:36,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:27:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:36,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:27:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:37,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:27:37,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 129 [2018-09-28 10:27:37,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-28 10:27:37,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-28 10:27:37,132 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:27:37,132 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 130 states. [2018-09-28 10:27:38,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:27:38,478 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-09-28 10:27:38,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-09-28 10:27:38,478 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 130 [2018-09-28 10:27:38,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:27:38,479 INFO L225 Difference]: With dead ends: 134 [2018-09-28 10:27:38,479 INFO L226 Difference]: Without dead ends: 132 [2018-09-28 10:27:38,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:27:38,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-28 10:27:38,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-28 10:27:38,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-28 10:27:38,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-28 10:27:38,482 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 130 [2018-09-28 10:27:38,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:27:38,483 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-28 10:27:38,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-28 10:27:38,483 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-28 10:27:38,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-28 10:27:38,483 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:27:38,483 INFO L375 BasicCegarLoop]: trace histogram [128, 1, 1, 1] [2018-09-28 10:27:38,484 INFO L423 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:27:38,484 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:27:38,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1207649021, now seen corresponding path program 128 times [2018-09-28 10:27:38,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:27:38,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:27:38,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:38,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:27:38,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:38,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:39,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:27:39,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:27:39,322 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:27:39,419 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:27:39,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:27:39,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:27:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:39,755 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:27:39,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 130 [2018-09-28 10:27:39,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-28 10:27:39,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-28 10:27:39,758 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:27:39,758 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 131 states. [2018-09-28 10:27:41,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:27:41,330 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-28 10:27:41,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-28 10:27:41,331 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 131 [2018-09-28 10:27:41,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:27:41,331 INFO L225 Difference]: With dead ends: 135 [2018-09-28 10:27:41,331 INFO L226 Difference]: Without dead ends: 133 [2018-09-28 10:27:41,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:27:41,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-28 10:27:41,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-28 10:27:41,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-28 10:27:41,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-28 10:27:41,334 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 131 [2018-09-28 10:27:41,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:27:41,334 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-28 10:27:41,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-28 10:27:41,335 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-28 10:27:41,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-28 10:27:41,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:27:41,335 INFO L375 BasicCegarLoop]: trace histogram [129, 1, 1, 1] [2018-09-28 10:27:41,335 INFO L423 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:27:41,336 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:27:41,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1217587820, now seen corresponding path program 129 times [2018-09-28 10:27:41,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:27:41,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:27:41,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:41,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:27:41,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:41,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:42,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:27:42,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:27:42,268 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:27:42,432 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2018-09-28 10:27:42,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:27:42,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:27:42,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:42,753 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:27:42,753 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 131 [2018-09-28 10:27:42,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-28 10:27:42,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-28 10:27:42,756 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:27:42,756 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 132 states. [2018-09-28 10:27:44,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:27:44,196 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-09-28 10:27:44,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-09-28 10:27:44,196 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 132 [2018-09-28 10:27:44,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:27:44,197 INFO L225 Difference]: With dead ends: 136 [2018-09-28 10:27:44,197 INFO L226 Difference]: Without dead ends: 134 [2018-09-28 10:27:44,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:27:44,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-28 10:27:44,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-28 10:27:44,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-28 10:27:44,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-28 10:27:44,200 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 132 [2018-09-28 10:27:44,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:27:44,200 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-28 10:27:44,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-28 10:27:44,200 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-28 10:27:44,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-28 10:27:44,200 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:27:44,201 INFO L375 BasicCegarLoop]: trace histogram [130, 1, 1, 1] [2018-09-28 10:27:44,201 INFO L423 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:27:44,201 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:27:44,201 INFO L82 PathProgramCache]: Analyzing trace with hash -909481437, now seen corresponding path program 130 times [2018-09-28 10:27:44,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:27:44,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:27:44,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:44,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:27:44,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:45,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:27:45,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:27:45,050 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:27:45,150 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:27:45,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:27:45,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:27:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:45,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:27:45,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 132 [2018-09-28 10:27:45,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-09-28 10:27:45,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-09-28 10:27:45,630 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:27:45,630 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 133 states. [2018-09-28 10:27:47,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:27:47,039 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-28 10:27:47,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-09-28 10:27:47,039 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 133 [2018-09-28 10:27:47,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:27:47,040 INFO L225 Difference]: With dead ends: 137 [2018-09-28 10:27:47,040 INFO L226 Difference]: Without dead ends: 135 [2018-09-28 10:27:47,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:27:47,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-28 10:27:47,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-28 10:27:47,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-28 10:27:47,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-28 10:27:47,042 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 133 [2018-09-28 10:27:47,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:27:47,043 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-28 10:27:47,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-09-28 10:27:47,043 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-28 10:27:47,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-28 10:27:47,043 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:27:47,043 INFO L375 BasicCegarLoop]: trace histogram [131, 1, 1, 1] [2018-09-28 10:27:47,043 INFO L423 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:27:47,043 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:27:47,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1870848332, now seen corresponding path program 131 times [2018-09-28 10:27:47,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:27:47,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:27:47,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:47,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:27:47,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:47,914 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:27:47,915 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:27:47,922 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:27:48,107 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-28 10:27:48,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:27:48,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:27:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:48,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:27:48,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 133 [2018-09-28 10:27:48,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-28 10:27:48,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-28 10:27:48,441 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:27:48,441 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 134 states. [2018-09-28 10:27:49,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:27:49,777 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-09-28 10:27:49,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-09-28 10:27:49,778 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 134 [2018-09-28 10:27:49,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:27:49,778 INFO L225 Difference]: With dead ends: 138 [2018-09-28 10:27:49,778 INFO L226 Difference]: Without dead ends: 136 [2018-09-28 10:27:49,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:27:49,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-28 10:27:49,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-28 10:27:49,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-28 10:27:49,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-28 10:27:49,780 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 134 [2018-09-28 10:27:49,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:27:49,781 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-28 10:27:49,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-28 10:27:49,781 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-28 10:27:49,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-28 10:27:49,781 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:27:49,782 INFO L375 BasicCegarLoop]: trace histogram [132, 1, 1, 1] [2018-09-28 10:27:49,782 INFO L423 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:27:49,782 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:27:49,782 INFO L82 PathProgramCache]: Analyzing trace with hash -2133242045, now seen corresponding path program 132 times [2018-09-28 10:27:49,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:27:49,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:27:49,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:49,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:27:49,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:50,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:50,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:27:50,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:27:50,873 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:27:51,035 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-28 10:27:51,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:27:51,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:27:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:51,372 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:27:51,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 134 [2018-09-28 10:27:51,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-09-28 10:27:51,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-09-28 10:27:51,375 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:27:51,376 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 135 states. [2018-09-28 10:27:52,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:27:52,597 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-28 10:27:52,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-09-28 10:27:52,597 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 135 [2018-09-28 10:27:52,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:27:52,598 INFO L225 Difference]: With dead ends: 139 [2018-09-28 10:27:52,598 INFO L226 Difference]: Without dead ends: 137 [2018-09-28 10:27:52,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:27:52,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-28 10:27:52,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-28 10:27:52,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-28 10:27:52,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-28 10:27:52,600 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 135 [2018-09-28 10:27:52,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:27:52,600 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-28 10:27:52,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-09-28 10:27:52,600 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-28 10:27:52,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-28 10:27:52,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:27:52,601 INFO L375 BasicCegarLoop]: trace histogram [133, 1, 1, 1] [2018-09-28 10:27:52,601 INFO L423 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:27:52,601 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:27:52,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1705992148, now seen corresponding path program 133 times [2018-09-28 10:27:52,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:27:52,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:27:52,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:52,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:27:52,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:53,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:27:53,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:27:53,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:27:53,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:53,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:27:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:53,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:27:53,915 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135] total 135 [2018-09-28 10:27:53,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-28 10:27:53,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-28 10:27:53,918 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:27:53,918 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 136 states. [2018-09-28 10:27:55,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:27:55,664 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2018-09-28 10:27:55,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-09-28 10:27:55,664 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 136 [2018-09-28 10:27:55,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:27:55,664 INFO L225 Difference]: With dead ends: 140 [2018-09-28 10:27:55,665 INFO L226 Difference]: Without dead ends: 138 [2018-09-28 10:27:55,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:27:55,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-28 10:27:55,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-28 10:27:55,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-28 10:27:55,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-28 10:27:55,667 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 136 [2018-09-28 10:27:55,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:27:55,667 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-28 10:27:55,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-28 10:27:55,667 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-28 10:27:55,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-28 10:27:55,667 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:27:55,668 INFO L375 BasicCegarLoop]: trace histogram [134, 1, 1, 1] [2018-09-28 10:27:55,668 INFO L423 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:27:55,668 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:27:55,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1346147229, now seen corresponding path program 134 times [2018-09-28 10:27:55,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:27:55,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:27:55,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:55,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:27:55,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:56,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:27:56,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:27:56,548 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:27:56,652 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:27:56,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:27:56,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:27:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:57,005 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:27:57,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136] total 136 [2018-09-28 10:27:57,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-28 10:27:57,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-28 10:27:57,008 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:27:57,008 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 137 states. [2018-09-28 10:27:58,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:27:58,689 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-28 10:27:58,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-28 10:27:58,689 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 137 [2018-09-28 10:27:58,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:27:58,690 INFO L225 Difference]: With dead ends: 141 [2018-09-28 10:27:58,690 INFO L226 Difference]: Without dead ends: 139 [2018-09-28 10:27:58,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:27:58,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-28 10:27:58,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-28 10:27:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-28 10:27:58,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-28 10:27:58,692 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 137 [2018-09-28 10:27:58,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:27:58,692 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-28 10:27:58,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-28 10:27:58,692 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-28 10:27:58,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-28 10:27:58,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:27:58,693 INFO L375 BasicCegarLoop]: trace histogram [135, 1, 1, 1] [2018-09-28 10:27:58,693 INFO L423 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:27:58,693 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:27:58,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1219110668, now seen corresponding path program 135 times [2018-09-28 10:27:58,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:27:58,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:27:58,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:58,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:27:58,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:27:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:27:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:27:59,624 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:27:59,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:27:59,631 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:27:59,812 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2018-09-28 10:27:59,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:27:59,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:00,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:00,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137] total 137 [2018-09-28 10:28:00,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-28 10:28:00,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-28 10:28:00,173 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:00,173 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 138 states. [2018-09-28 10:28:01,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:01,614 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-09-28 10:28:01,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-09-28 10:28:01,614 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 138 [2018-09-28 10:28:01,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:01,615 INFO L225 Difference]: With dead ends: 142 [2018-09-28 10:28:01,615 INFO L226 Difference]: Without dead ends: 140 [2018-09-28 10:28:01,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:01,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-28 10:28:01,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-28 10:28:01,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-28 10:28:01,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-28 10:28:01,618 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 138 [2018-09-28 10:28:01,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:01,618 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-28 10:28:01,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-28 10:28:01,618 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-28 10:28:01,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-28 10:28:01,619 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:01,619 INFO L375 BasicCegarLoop]: trace histogram [136, 1, 1, 1] [2018-09-28 10:28:01,619 INFO L423 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:01,619 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:01,619 INFO L82 PathProgramCache]: Analyzing trace with hash -862273149, now seen corresponding path program 136 times [2018-09-28 10:28:01,620 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:01,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:01,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:01,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:01,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:01,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:02,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:02,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:02,599 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:28:02,706 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:28:02,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:02,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:03,104 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:03,104 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 138] total 138 [2018-09-28 10:28:03,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-09-28 10:28:03,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-09-28 10:28:03,107 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:03,107 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 139 states. [2018-09-28 10:28:04,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:04,889 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-28 10:28:04,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-09-28 10:28:04,890 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 139 [2018-09-28 10:28:04,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:04,890 INFO L225 Difference]: With dead ends: 143 [2018-09-28 10:28:04,890 INFO L226 Difference]: Without dead ends: 141 [2018-09-28 10:28:04,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:04,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-28 10:28:04,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-28 10:28:04,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-28 10:28:04,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-28 10:28:04,893 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 139 [2018-09-28 10:28:04,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:04,893 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-28 10:28:04,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-09-28 10:28:04,893 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-28 10:28:04,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-28 10:28:04,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:04,893 INFO L375 BasicCegarLoop]: trace histogram [137, 1, 1, 1] [2018-09-28 10:28:04,893 INFO L423 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:04,894 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:04,894 INFO L82 PathProgramCache]: Analyzing trace with hash -960662036, now seen corresponding path program 137 times [2018-09-28 10:28:04,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:04,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:04,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:04,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:04,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:06,034 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:06,034 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:06,042 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:28:06,247 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2018-09-28 10:28:06,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:06,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:06,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:06,608 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139] total 139 [2018-09-28 10:28:06,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-28 10:28:06,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-28 10:28:06,611 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:06,611 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 140 states. [2018-09-28 10:28:08,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:08,171 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2018-09-28 10:28:08,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-09-28 10:28:08,172 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 140 [2018-09-28 10:28:08,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:08,172 INFO L225 Difference]: With dead ends: 144 [2018-09-28 10:28:08,172 INFO L226 Difference]: Without dead ends: 142 [2018-09-28 10:28:08,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:08,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-28 10:28:08,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-28 10:28:08,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-28 10:28:08,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-28 10:28:08,175 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 140 [2018-09-28 10:28:08,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:08,175 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-28 10:28:08,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-28 10:28:08,175 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-28 10:28:08,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-28 10:28:08,175 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:08,175 INFO L375 BasicCegarLoop]: trace histogram [138, 1, 1, 1] [2018-09-28 10:28:08,176 INFO L423 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:08,176 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:08,176 INFO L82 PathProgramCache]: Analyzing trace with hash 284249763, now seen corresponding path program 138 times [2018-09-28 10:28:08,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:08,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:08,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:08,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:08,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:09,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:09,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:09,150 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:28:09,329 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2018-09-28 10:28:09,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:09,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:09,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:09,685 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:09,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 140] total 140 [2018-09-28 10:28:09,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-09-28 10:28:09,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-09-28 10:28:09,689 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:09,689 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 141 states. [2018-09-28 10:28:11,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:11,534 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-28 10:28:11,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-09-28 10:28:11,535 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 141 [2018-09-28 10:28:11,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:11,535 INFO L225 Difference]: With dead ends: 145 [2018-09-28 10:28:11,535 INFO L226 Difference]: Without dead ends: 143 [2018-09-28 10:28:11,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:11,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-28 10:28:11,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-28 10:28:11,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-28 10:28:11,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-28 10:28:11,538 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 141 [2018-09-28 10:28:11,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:11,538 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-28 10:28:11,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-09-28 10:28:11,538 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-28 10:28:11,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-28 10:28:11,539 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:11,539 INFO L375 BasicCegarLoop]: trace histogram [139, 1, 1, 1] [2018-09-28 10:28:11,539 INFO L423 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:11,539 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:11,539 INFO L82 PathProgramCache]: Analyzing trace with hash 221809868, now seen corresponding path program 139 times [2018-09-28 10:28:11,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:11,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:11,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:11,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:11,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:12,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:12,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:12,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:28:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:12,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:12,962 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:12,962 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141, 141] total 141 [2018-09-28 10:28:12,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-28 10:28:12,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-28 10:28:12,965 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:12,966 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 142 states. [2018-09-28 10:28:14,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:14,628 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-09-28 10:28:14,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-09-28 10:28:14,629 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 142 [2018-09-28 10:28:14,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:14,629 INFO L225 Difference]: With dead ends: 146 [2018-09-28 10:28:14,629 INFO L226 Difference]: Without dead ends: 144 [2018-09-28 10:28:14,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:14,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-28 10:28:14,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-09-28 10:28:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-28 10:28:14,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-09-28 10:28:14,632 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 142 [2018-09-28 10:28:14,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:14,632 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-09-28 10:28:14,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-28 10:28:14,632 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-09-28 10:28:14,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-28 10:28:14,633 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:14,633 INFO L375 BasicCegarLoop]: trace histogram [140, 1, 1, 1] [2018-09-28 10:28:14,633 INFO L423 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:14,633 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:14,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1713826877, now seen corresponding path program 140 times [2018-09-28 10:28:14,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:14,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:14,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:14,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:28:14,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:15,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:15,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:15,599 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:28:15,710 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:28:15,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:15,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:16,333 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:16,333 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [142, 142] total 142 [2018-09-28 10:28:16,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-09-28 10:28:16,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-09-28 10:28:16,337 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:16,337 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 143 states. [2018-09-28 10:28:18,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:18,107 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-28 10:28:18,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-09-28 10:28:18,107 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 143 [2018-09-28 10:28:18,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:18,108 INFO L225 Difference]: With dead ends: 147 [2018-09-28 10:28:18,108 INFO L226 Difference]: Without dead ends: 145 [2018-09-28 10:28:18,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:18,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-28 10:28:18,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-28 10:28:18,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-28 10:28:18,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-28 10:28:18,110 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 143 [2018-09-28 10:28:18,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:18,110 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-28 10:28:18,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-09-28 10:28:18,110 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-28 10:28:18,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-28 10:28:18,111 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:18,111 INFO L375 BasicCegarLoop]: trace histogram [141, 1, 1, 1] [2018-09-28 10:28:18,111 INFO L423 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:18,111 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:18,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1589023828, now seen corresponding path program 141 times [2018-09-28 10:28:18,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:18,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:18,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:18,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:18,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:19,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:19,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:19,078 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:28:19,264 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2018-09-28 10:28:19,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:19,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:19,623 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:19,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:19,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143, 143] total 143 [2018-09-28 10:28:19,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-28 10:28:19,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-28 10:28:19,647 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:19,647 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 144 states. [2018-09-28 10:28:21,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:21,110 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-09-28 10:28:21,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-09-28 10:28:21,110 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 144 [2018-09-28 10:28:21,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:21,111 INFO L225 Difference]: With dead ends: 148 [2018-09-28 10:28:21,111 INFO L226 Difference]: Without dead ends: 146 [2018-09-28 10:28:21,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:21,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-28 10:28:21,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-28 10:28:21,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-28 10:28:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-09-28 10:28:21,113 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 144 [2018-09-28 10:28:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:21,113 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-09-28 10:28:21,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-28 10:28:21,113 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-09-28 10:28:21,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-28 10:28:21,114 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:21,114 INFO L375 BasicCegarLoop]: trace histogram [142, 1, 1, 1] [2018-09-28 10:28:21,114 INFO L423 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:21,114 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:21,114 INFO L82 PathProgramCache]: Analyzing trace with hash -2015096605, now seen corresponding path program 142 times [2018-09-28 10:28:21,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:21,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:21,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:21,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:21,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:22,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:22,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:22,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:22,163 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:28:22,284 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:28:22,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:22,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:22,662 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:22,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144, 144] total 144 [2018-09-28 10:28:22,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-09-28 10:28:22,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-09-28 10:28:22,666 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:22,667 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 145 states. [2018-09-28 10:28:24,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:24,478 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-28 10:28:24,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-09-28 10:28:24,478 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 145 [2018-09-28 10:28:24,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:24,479 INFO L225 Difference]: With dead ends: 149 [2018-09-28 10:28:24,479 INFO L226 Difference]: Without dead ends: 147 [2018-09-28 10:28:24,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:24,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-28 10:28:24,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-28 10:28:24,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-28 10:28:24,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-28 10:28:24,481 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 145 [2018-09-28 10:28:24,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:24,481 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-28 10:28:24,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-09-28 10:28:24,481 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-28 10:28:24,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-28 10:28:24,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:24,482 INFO L375 BasicCegarLoop]: trace histogram [143, 1, 1, 1] [2018-09-28 10:28:24,482 INFO L423 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:24,482 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:24,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1956516492, now seen corresponding path program 143 times [2018-09-28 10:28:24,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:24,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:24,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:24,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:24,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:25,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:25,452 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:25,452 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:25,459 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:28:25,672 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-09-28 10:28:25,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:25,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:26,050 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:26,050 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 145] total 145 [2018-09-28 10:28:26,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-28 10:28:26,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-28 10:28:26,054 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:26,054 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 146 states. [2018-09-28 10:28:27,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:27,962 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2018-09-28 10:28:27,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-09-28 10:28:27,962 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 146 [2018-09-28 10:28:27,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:27,963 INFO L225 Difference]: With dead ends: 150 [2018-09-28 10:28:27,963 INFO L226 Difference]: Without dead ends: 148 [2018-09-28 10:28:27,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:27,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-28 10:28:27,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-28 10:28:27,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-28 10:28:27,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-09-28 10:28:27,965 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 146 [2018-09-28 10:28:27,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:27,965 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-09-28 10:28:27,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-28 10:28:27,966 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-09-28 10:28:27,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-28 10:28:27,966 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:27,966 INFO L375 BasicCegarLoop]: trace histogram [144, 1, 1, 1] [2018-09-28 10:28:27,966 INFO L423 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:27,966 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:27,966 INFO L82 PathProgramCache]: Analyzing trace with hash 522470915, now seen corresponding path program 144 times [2018-09-28 10:28:27,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:27,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:27,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:27,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:27,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:28,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:28,963 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:28,970 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:28:29,156 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-28 10:28:29,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:29,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:29,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:29,538 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:29,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 146] total 146 [2018-09-28 10:28:29,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-09-28 10:28:29,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-09-28 10:28:29,542 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:29,542 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 147 states. [2018-09-28 10:28:31,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:31,007 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-28 10:28:31,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-09-28 10:28:31,007 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 147 [2018-09-28 10:28:31,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:31,008 INFO L225 Difference]: With dead ends: 151 [2018-09-28 10:28:31,008 INFO L226 Difference]: Without dead ends: 149 [2018-09-28 10:28:31,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:31,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-28 10:28:31,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-28 10:28:31,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-28 10:28:31,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-28 10:28:31,010 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 147 [2018-09-28 10:28:31,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:31,010 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-28 10:28:31,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-09-28 10:28:31,010 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-28 10:28:31,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-28 10:28:31,010 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:31,011 INFO L375 BasicCegarLoop]: trace histogram [145, 1, 1, 1] [2018-09-28 10:28:31,011 INFO L423 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:31,011 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:31,011 INFO L82 PathProgramCache]: Analyzing trace with hash -983269012, now seen corresponding path program 145 times [2018-09-28 10:28:31,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:31,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:31,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:31,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:31,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:32,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:32,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:32,257 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:32,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:28:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:32,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:32,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:32,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:32,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 147] total 147 [2018-09-28 10:28:32,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-28 10:28:32,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-28 10:28:32,745 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:32,745 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 148 states. [2018-09-28 10:28:34,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:34,770 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2018-09-28 10:28:34,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-09-28 10:28:34,770 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 148 [2018-09-28 10:28:34,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:34,770 INFO L225 Difference]: With dead ends: 152 [2018-09-28 10:28:34,770 INFO L226 Difference]: Without dead ends: 150 [2018-09-28 10:28:34,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:34,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-09-28 10:28:34,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-09-28 10:28:34,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-28 10:28:34,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-09-28 10:28:34,773 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 148 [2018-09-28 10:28:34,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:34,773 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-09-28 10:28:34,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-28 10:28:34,773 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-09-28 10:28:34,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-28 10:28:34,773 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:34,773 INFO L375 BasicCegarLoop]: trace histogram [146, 1, 1, 1] [2018-09-28 10:28:34,774 INFO L423 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:34,774 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:34,774 INFO L82 PathProgramCache]: Analyzing trace with hash -416566493, now seen corresponding path program 146 times [2018-09-28 10:28:34,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:34,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:34,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:34,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:28:34,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:35,784 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:35,784 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:35,791 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:28:35,907 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:28:35,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:35,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:36,303 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:36,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148, 148] total 148 [2018-09-28 10:28:36,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-09-28 10:28:36,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-09-28 10:28:36,308 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:36,308 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 149 states. [2018-09-28 10:28:38,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:38,458 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-28 10:28:38,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-09-28 10:28:38,458 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 149 [2018-09-28 10:28:38,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:38,458 INFO L225 Difference]: With dead ends: 153 [2018-09-28 10:28:38,458 INFO L226 Difference]: Without dead ends: 151 [2018-09-28 10:28:38,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:38,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-28 10:28:38,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-28 10:28:38,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-28 10:28:38,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-28 10:28:38,461 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 149 [2018-09-28 10:28:38,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:38,461 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-28 10:28:38,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-09-28 10:28:38,461 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-28 10:28:38,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-28 10:28:38,461 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:38,461 INFO L375 BasicCegarLoop]: trace histogram [147, 1, 1, 1] [2018-09-28 10:28:38,462 INFO L423 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:38,462 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:38,462 INFO L82 PathProgramCache]: Analyzing trace with hash -28657588, now seen corresponding path program 147 times [2018-09-28 10:28:38,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:38,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:38,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:38,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:38,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:39,501 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:39,501 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:39,508 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:28:39,699 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 75 check-sat command(s) [2018-09-28 10:28:39,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:39,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:40,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:40,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:40,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149, 149] total 149 [2018-09-28 10:28:40,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-28 10:28:40,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-28 10:28:40,089 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:40,089 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 150 states. [2018-09-28 10:28:42,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:42,086 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-09-28 10:28:42,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-09-28 10:28:42,086 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 150 [2018-09-28 10:28:42,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:42,086 INFO L225 Difference]: With dead ends: 154 [2018-09-28 10:28:42,087 INFO L226 Difference]: Without dead ends: 152 [2018-09-28 10:28:42,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:42,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-28 10:28:42,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-28 10:28:42,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-28 10:28:42,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-09-28 10:28:42,089 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 150 [2018-09-28 10:28:42,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:42,090 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-09-28 10:28:42,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-28 10:28:42,090 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-09-28 10:28:42,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-28 10:28:42,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:42,091 INFO L375 BasicCegarLoop]: trace histogram [148, 1, 1, 1] [2018-09-28 10:28:42,091 INFO L423 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:42,091 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:42,091 INFO L82 PathProgramCache]: Analyzing trace with hash -888383421, now seen corresponding path program 148 times [2018-09-28 10:28:42,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:42,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:42,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:42,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:42,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:43,173 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:43,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:43,180 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:28:43,289 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:28:43,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:43,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:43,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:43,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [150, 150] total 150 [2018-09-28 10:28:43,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 151 states [2018-09-28 10:28:43,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2018-09-28 10:28:43,680 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:43,680 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 151 states. [2018-09-28 10:28:45,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:45,592 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-28 10:28:45,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-09-28 10:28:45,592 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 151 [2018-09-28 10:28:45,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:45,593 INFO L225 Difference]: With dead ends: 155 [2018-09-28 10:28:45,593 INFO L226 Difference]: Without dead ends: 153 [2018-09-28 10:28:45,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:45,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-28 10:28:45,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-28 10:28:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-28 10:28:45,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-28 10:28:45,595 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 151 [2018-09-28 10:28:45,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:45,595 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-28 10:28:45,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 151 states. [2018-09-28 10:28:45,596 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-28 10:28:45,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-28 10:28:45,596 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:45,596 INFO L375 BasicCegarLoop]: trace histogram [149, 1, 1, 1] [2018-09-28 10:28:45,596 INFO L423 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:45,596 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:45,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1770080468, now seen corresponding path program 149 times [2018-09-28 10:28:45,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:45,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:45,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:45,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:45,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-28 10:28:46,595 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-28 10:28:46,599 WARN L206 ceAbstractionStarter]: Timeout [2018-09-28 10:28:46,599 INFO L202 PluginConnector]: Adding new model const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.09 10:28:46 BoogieIcfgContainer [2018-09-28 10:28:46,599 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-28 10:28:46,600 INFO L168 Benchmark]: Toolchain (without parser) took 243647.85 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 271.6 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -13.2 MB). Peak memory consumption was 903.2 MB. Max. memory is 7.1 GB. [2018-09-28 10:28:46,602 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:28:46,602 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.97 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:28:46,603 INFO L168 Benchmark]: Boogie Preprocessor took 16.81 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:28:46,603 INFO L168 Benchmark]: RCFGBuilder took 273.07 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:28:46,603 INFO L168 Benchmark]: TraceAbstraction took 243305.02 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 271.6 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -34.4 MB). Peak memory consumption was 882.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:28:46,606 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 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.97 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 16.81 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 273.07 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 243305.02 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 271.6 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -34.4 MB). Peak memory consumption was 882.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 37]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 37). Cancelled while BasicCegarLoop was analyzing trace of length 153 with TraceHistMax 149, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 151 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 243.2s OverallTime, 150 OverallIterations, 149 TraceHistogramMax, 107.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 448 SDtfs, 0 SDslu, 6558 SDs, 0 SdLazy, 17881 SolverSat, 252 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22646 GetRequests, 11471 SyntacticMatches, 0 SemanticMatches, 11175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=153occurred in iteration=149, 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, 149 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.8s SsaConstructionTime, 11.0s SatisfiabilityAnalysisTime, 112.0s InterpolantComputationTime, 22943 NumberOfCodeBlocks, 22943 NumberOfCodeBlocksAsserted, 3097 NumberOfCheckSat, 22646 ConstructedInterpolants, 0 QuantifiedInterpolants, 6772340 SizeOfPredicates, 148 NumberOfNonLiveVariables, 68820 ConjunctsInSsa, 11322 ConjunctsInUnsatCore, 297 InterpolantComputations, 1 PerfectInterpolantSequences, 0/1102600 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/const1.i_3.bplTransformedIcfg_BEv2_6.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-28_10-28-46-615.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/const1.i_3.bplTransformedIcfg_BEv2_6.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-28_10-28-46-615.csv Completed graceful shutdown