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/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-00a8621 [2018-09-30 10:47:29,978 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:47:29,980 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:47:29,997 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:47:29,997 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:47:29,998 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:47:29,999 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:47:30,005 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:47:30,006 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:47:30,007 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:47:30,008 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 10:47:30,048 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-30 10:47:30,066 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:47:30,066 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:47:30,070 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:47:30,070 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:47:30,071 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:47:30,071 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:47:30,071 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:47:30,071 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:47:30,072 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:47:30,072 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:47:30,072 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:47:30,072 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:47:30,074 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:47:30,074 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:47:30,074 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:47:30,074 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:47:30,075 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:47:30,075 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:47:30,075 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:47:30,075 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:47:30,077 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:47:30,077 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:47:30,077 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:47:30,077 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:47:30,078 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:47:30,078 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:47:30,078 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:47:30,078 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:47:30,078 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:47:30,079 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:47:30,079 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 10:47:30,154 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:47:30,168 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:47:30,174 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:47:30,176 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:47:30,176 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:47:30,177 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl [2018-09-30 10:47:30,178 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl' [2018-09-30 10:47:30,234 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:47:30,237 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:47:30,238 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:47:30,238 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:47:30,238 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:47:30,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:47:30" (1/1) ... [2018-09-30 10:47:30,272 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:47:30" (1/1) ... [2018-09-30 10:47:30,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:47:30,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:47:30,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:47:30,280 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:47:30,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:47:30" (1/1) ... [2018-09-30 10:47:30,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:47:30" (1/1) ... [2018-09-30 10:47:30,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:47:30" (1/1) ... [2018-09-30 10:47:30,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:47:30" (1/1) ... [2018-09-30 10:47:30,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:47:30" (1/1) ... [2018-09-30 10:47:30,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:47:30" (1/1) ... [2018-09-30 10:47:30,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:47:30" (1/1) ... [2018-09-30 10:47:30,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:47:30,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:47:30,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:47:30,303 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:47:30,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:47:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:47:30,369 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-30 10:47:30,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 10:47:30,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 10:47:30,590 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 10:47:30,590 INFO L202 PluginConnector]: Adding new model overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:47:30 BoogieIcfgContainer [2018-09-30 10:47:30,590 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:47:30,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:47:30,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:47:30,596 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:47:30,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:47:30" (1/2) ... [2018-09-30 10:47:30,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42eff141 and model type overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:47:30, skipping insertion in model container [2018-09-30 10:47:30,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:47:30" (2/2) ... [2018-09-30 10:47:30,599 INFO L112 eAbstractionObserver]: Analyzing ICFG overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl [2018-09-30 10:47:30,610 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:47:30,618 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 10:47:30,677 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:47:30,678 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:47:30,678 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:47:30,678 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:47:30,678 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:47:30,679 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:47:30,679 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:47:30,679 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:47:30,679 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:47:30,698 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 10:47:30,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 10:47:30,717 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:30,718 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 10:47:30,721 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:30,730 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:30,731 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-09-30 10:47:30,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:30,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:30,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:30,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:30,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:30,992 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:47:30,992 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 10:47:30,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:47:31,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:47:31,016 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:31,019 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 10:47:31,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:31,171 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-30 10:47:31,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:47:31,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 10:47:31,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:31,189 INFO L225 Difference]: With dead ends: 9 [2018-09-30 10:47:31,189 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 10:47:31,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:31,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 10:47:31,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 10:47:31,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 10:47:31,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 10:47:31,231 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 10:47:31,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:31,231 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 10:47:31,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:47:31,232 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 10:47:31,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 10:47:31,232 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:31,232 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 10:47:31,233 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:31,233 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:31,233 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-09-30 10:47:31,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:31,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:31,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:31,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:31,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:31,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:31,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:31,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:31,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:31,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:31,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:31,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:31,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 10:47:31,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 10:47:31,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 10:47:31,509 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:31,509 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-30 10:47:31,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:31,859 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-30 10:47:31,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:47:31,860 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-30 10:47:31,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:31,861 INFO L225 Difference]: With dead ends: 8 [2018-09-30 10:47:31,861 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 10:47:31,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:31,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 10:47:31,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 10:47:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 10:47:31,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 10:47:31,868 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 10:47:31,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:31,868 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 10:47:31,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 10:47:31,868 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 10:47:31,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 10:47:31,869 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:31,869 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-30 10:47:31,869 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:31,869 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:31,870 INFO L82 PathProgramCache]: Analyzing trace with hash 28783137, now seen corresponding path program 2 times [2018-09-30 10:47:31,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:31,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:31,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:31,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:31,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:31,963 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:31,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:31,983 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:47:32,002 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:47:32,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:32,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:32,052 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:32,052 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 10:47:32,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:47:32,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:47:32,053 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:32,053 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-30 10:47:32,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:32,214 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 10:47:32,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:47:32,216 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-30 10:47:32,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:32,216 INFO L225 Difference]: With dead ends: 9 [2018-09-30 10:47:32,216 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 10:47:32,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:32,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 10:47:32,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 10:47:32,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 10:47:32,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 10:47:32,223 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 10:47:32,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:32,225 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 10:47:32,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:47:32,225 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 10:47:32,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 10:47:32,226 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:32,226 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-30 10:47:32,227 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:32,227 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:32,228 INFO L82 PathProgramCache]: Analyzing trace with hash 892275272, now seen corresponding path program 3 times [2018-09-30 10:47:32,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:32,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:32,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:32,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:32,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:32,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:32,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:32,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:32,453 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:47:32,465 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 10:47:32,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:32,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:32,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:32,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:32,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:47:32,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:47:32,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:47:32,512 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:32,512 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-30 10:47:32,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:32,650 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 10:47:32,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:47:32,652 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-30 10:47:32,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:32,653 INFO L225 Difference]: With dead ends: 10 [2018-09-30 10:47:32,653 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 10:47:32,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:32,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 10:47:32,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 10:47:32,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 10:47:32,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 10:47:32,657 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-30 10:47:32,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:32,657 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 10:47:32,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:47:32,657 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 10:47:32,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:47:32,658 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:32,658 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-30 10:47:32,658 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:32,658 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:32,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1890727681, now seen corresponding path program 4 times [2018-09-30 10:47:32,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:32,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:32,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:32,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:32,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:32,718 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:32,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:32,726 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:47:32,767 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:47:32,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:32,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:32,906 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:32,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:47:32,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:47:32,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:47:32,907 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:32,907 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-30 10:47:32,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:32,970 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 10:47:32,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:47:32,971 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-30 10:47:32,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:32,972 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:47:32,972 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 10:47:32,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:32,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 10:47:32,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 10:47:32,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 10:47:32,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 10:47:32,975 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-30 10:47:32,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:32,976 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 10:47:32,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:47:32,976 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 10:47:32,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 10:47:32,977 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:32,977 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-30 10:47:32,977 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:32,977 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:32,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1516986008, now seen corresponding path program 5 times [2018-09-30 10:47:32,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:32,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:32,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:32,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:32,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:33,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:33,080 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:33,095 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:47:33,105 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 10:47:33,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:33,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:33,165 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:33,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:47:33,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:47:33,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:47:33,167 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:33,167 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-30 10:47:33,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:33,324 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 10:47:33,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:47:33,325 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-30 10:47:33,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:33,326 INFO L225 Difference]: With dead ends: 12 [2018-09-30 10:47:33,327 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 10:47:33,327 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:33,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 10:47:33,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 10:47:33,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 10:47:33,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 10:47:33,330 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-30 10:47:33,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:33,331 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 10:47:33,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:47:33,331 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 10:47:33,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:47:33,331 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:33,332 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-30 10:47:33,332 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:33,332 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:33,332 INFO L82 PathProgramCache]: Analyzing trace with hash 218072033, now seen corresponding path program 6 times [2018-09-30 10:47:33,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:33,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:33,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:33,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:33,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:33,850 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:33,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:33,858 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:47:33,872 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 10:47:33,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:33,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:33,962 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:33,962 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:47:33,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:47:33,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:47:33,963 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:33,964 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-30 10:47:34,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:34,079 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 10:47:34,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:47:34,080 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-30 10:47:34,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:34,081 INFO L225 Difference]: With dead ends: 13 [2018-09-30 10:47:34,081 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 10:47:34,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:34,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 10:47:34,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 10:47:34,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 10:47:34,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 10:47:34,085 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-30 10:47:34,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:34,085 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 10:47:34,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:47:34,086 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 10:47:34,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:47:34,086 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:34,087 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-30 10:47:34,087 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:34,087 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:34,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1829703544, now seen corresponding path program 7 times [2018-09-30 10:47:34,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:34,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:34,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:34,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:34,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:34,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:34,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:34,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:34,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:34,300 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:34,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:34,331 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:47:34,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:47:34,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:47:34,332 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:34,332 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-30 10:47:34,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:34,478 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 10:47:34,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:47:34,479 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-30 10:47:34,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:34,480 INFO L225 Difference]: With dead ends: 14 [2018-09-30 10:47:34,480 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 10:47:34,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:34,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 10:47:34,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 10:47:34,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 10:47:34,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 10:47:34,484 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-30 10:47:34,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:34,484 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 10:47:34,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:47:34,484 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 10:47:34,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:47:34,485 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:34,485 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-30 10:47:34,485 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:34,485 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:34,486 INFO L82 PathProgramCache]: Analyzing trace with hash -886236991, now seen corresponding path program 8 times [2018-09-30 10:47:34,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:34,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:34,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:34,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:34,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:34,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:34,655 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:34,666 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:47:34,696 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:47:34,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:34,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:34,767 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:34,768 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:47:34,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:47:34,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:47:34,769 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:34,769 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-30 10:47:34,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:34,922 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 10:47:34,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:47:34,927 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-30 10:47:34,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:34,928 INFO L225 Difference]: With dead ends: 15 [2018-09-30 10:47:34,928 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 10:47:34,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:34,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 10:47:34,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 10:47:34,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 10:47:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 10:47:34,931 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-30 10:47:34,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:34,931 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 10:47:34,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:47:34,931 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 10:47:34,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 10:47:34,932 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:34,932 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-30 10:47:34,932 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:34,933 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:34,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1703544920, now seen corresponding path program 9 times [2018-09-30 10:47:34,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:34,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:34,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:34,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:34,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:35,068 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:35,068 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:35,079 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:47:35,099 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 10:47:35,100 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:35,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:35,204 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:35,204 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 10:47:35,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:47:35,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:47:35,205 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:35,205 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-30 10:47:35,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:35,311 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 10:47:35,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 10:47:35,311 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-30 10:47:35,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:35,312 INFO L225 Difference]: With dead ends: 16 [2018-09-30 10:47:35,313 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 10:47:35,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:35,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 10:47:35,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 10:47:35,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:47:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 10:47:35,316 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-30 10:47:35,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:35,316 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 10:47:35,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:47:35,316 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 10:47:35,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:47:35,317 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:35,317 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-30 10:47:35,317 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:35,317 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:35,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1270286943, now seen corresponding path program 10 times [2018-09-30 10:47:35,317 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:35,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:35,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:35,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:35,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:35,444 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:35,444 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:35,452 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:47:35,462 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:47:35,462 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:35,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:35,531 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:35,532 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 10:47:35,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:47:35,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:47:35,533 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:35,533 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-30 10:47:35,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:35,627 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 10:47:35,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:47:35,627 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-30 10:47:35,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:35,628 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:47:35,629 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 10:47:35,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:35,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 10:47:35,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 10:47:35,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 10:47:35,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 10:47:35,633 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-30 10:47:35,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:35,633 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 10:47:35,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:47:35,633 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 10:47:35,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:47:35,634 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:35,634 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-30 10:47:35,634 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:35,634 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:35,635 INFO L82 PathProgramCache]: Analyzing trace with hash -724191544, now seen corresponding path program 11 times [2018-09-30 10:47:35,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:35,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:35,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:35,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:35,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:35,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:35,768 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:35,768 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:35,777 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:47:35,799 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:47:35,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:35,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:35,882 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:35,883 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 10:47:35,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:47:35,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:47:35,884 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:35,884 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-30 10:47:35,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:35,995 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 10:47:35,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 10:47:35,995 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 10:47:35,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:35,996 INFO L225 Difference]: With dead ends: 18 [2018-09-30 10:47:35,997 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 10:47:35,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:35,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 10:47:36,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 10:47:36,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:47:36,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 10:47:36,001 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-30 10:47:36,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:36,001 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 10:47:36,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:47:36,002 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 10:47:36,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:47:36,002 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:36,002 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-30 10:47:36,002 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:36,003 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:36,003 INFO L82 PathProgramCache]: Analyzing trace with hash -975103359, now seen corresponding path program 12 times [2018-09-30 10:47:36,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:36,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:36,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:36,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:36,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:36,114 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:36,114 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:36,123 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:47:36,138 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:47:36,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:36,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:36,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:36,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 10:47:36,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:47:36,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:47:36,221 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:36,221 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-30 10:47:36,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:36,359 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 10:47:36,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 10:47:36,360 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-30 10:47:36,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:36,361 INFO L225 Difference]: With dead ends: 19 [2018-09-30 10:47:36,361 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 10:47:36,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:36,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 10:47:36,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 10:47:36,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 10:47:36,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 10:47:36,367 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-30 10:47:36,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:36,367 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 10:47:36,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:47:36,367 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 10:47:36,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 10:47:36,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:36,368 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-30 10:47:36,368 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:36,368 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:36,369 INFO L82 PathProgramCache]: Analyzing trace with hash -163435032, now seen corresponding path program 13 times [2018-09-30 10:47:36,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:36,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:36,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:36,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:36,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:36,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:36,479 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:36,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:36,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:36,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:36,629 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 10:47:36,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:47:36,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:47:36,630 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:36,630 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-30 10:47:36,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:36,902 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 10:47:36,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 10:47:36,902 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-30 10:47:36,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:36,903 INFO L225 Difference]: With dead ends: 20 [2018-09-30 10:47:36,903 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 10:47:36,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:36,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 10:47:36,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 10:47:36,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:47:36,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 10:47:36,909 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-30 10:47:36,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:36,910 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 10:47:36,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:47:36,910 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 10:47:36,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:47:36,910 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:36,910 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-30 10:47:36,911 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:36,911 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:36,911 INFO L82 PathProgramCache]: Analyzing trace with hash -771520671, now seen corresponding path program 14 times [2018-09-30 10:47:36,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:36,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:36,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:36,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:36,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:37,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:37,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:37,104 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:47:37,128 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:47:37,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:37,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:37,225 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:37,226 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 10:47:37,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:47:37,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:47:37,226 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:37,227 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-30 10:47:37,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:37,353 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 10:47:37,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:47:37,353 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-30 10:47:37,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:37,354 INFO L225 Difference]: With dead ends: 21 [2018-09-30 10:47:37,354 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 10:47:37,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:37,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 10:47:37,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 10:47:37,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 10:47:37,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 10:47:37,359 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-30 10:47:37,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:37,359 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 10:47:37,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:47:37,359 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 10:47:37,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:47:37,360 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:37,360 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-30 10:47:37,360 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:37,360 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:37,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1852661000, now seen corresponding path program 15 times [2018-09-30 10:47:37,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:37,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:37,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:37,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:37,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:37,596 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:37,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:37,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:37,604 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:47:37,618 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:47:37,619 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:37,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:37,674 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:37,695 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:37,695 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 10:47:37,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:47:37,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:47:37,696 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:37,696 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-30 10:47:38,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:38,076 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 10:47:38,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:47:38,076 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-30 10:47:38,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:38,077 INFO L225 Difference]: With dead ends: 22 [2018-09-30 10:47:38,077 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 10:47:38,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:38,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 10:47:38,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 10:47:38,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:47:38,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 10:47:38,082 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-30 10:47:38,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:38,082 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 10:47:38,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:47:38,082 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 10:47:38,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:47:38,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:38,083 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-30 10:47:38,083 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:38,083 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:38,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1597914177, now seen corresponding path program 16 times [2018-09-30 10:47:38,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:38,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:38,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:38,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:38,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:38,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:38,266 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:38,274 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:47:38,290 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:47:38,291 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:38,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:38,595 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:38,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 10:47:38,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 10:47:38,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 10:47:38,596 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:38,596 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-30 10:47:38,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:38,802 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 10:47:38,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 10:47:38,803 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-30 10:47:38,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:38,804 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:47:38,804 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 10:47:38,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:38,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 10:47:38,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 10:47:38,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 10:47:38,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 10:47:38,807 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-30 10:47:38,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:38,807 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 10:47:38,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 10:47:38,808 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 10:47:38,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 10:47:38,808 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:38,808 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-30 10:47:38,809 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:38,809 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:38,809 INFO L82 PathProgramCache]: Analyzing trace with hash -2004270040, now seen corresponding path program 17 times [2018-09-30 10:47:38,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:38,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:38,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:38,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:38,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:39,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:39,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:39,416 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:47:39,433 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 10:47:39,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:39,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:39,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:39,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 10:47:39,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:47:39,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:47:39,531 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:39,531 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-30 10:47:39,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:39,719 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 10:47:39,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 10:47:39,719 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-30 10:47:39,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:39,720 INFO L225 Difference]: With dead ends: 24 [2018-09-30 10:47:39,720 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 10:47:39,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:39,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 10:47:39,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 10:47:39,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:47:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 10:47:39,726 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-30 10:47:39,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:39,726 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 10:47:39,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:47:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 10:47:39,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:47:39,727 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:39,727 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-30 10:47:39,727 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:39,728 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:39,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2002831071, now seen corresponding path program 18 times [2018-09-30 10:47:39,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:39,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:39,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:39,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:39,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:39,873 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:39,873 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:39,873 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:39,883 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:47:39,916 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 10:47:39,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:39,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:40,007 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:40,007 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 10:47:40,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 10:47:40,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 10:47:40,008 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:40,008 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-30 10:47:40,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:40,156 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 10:47:40,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:47:40,156 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-30 10:47:40,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:40,157 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:47:40,157 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:47:40,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:40,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:47:40,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 10:47:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 10:47:40,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 10:47:40,162 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-30 10:47:40,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:40,163 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 10:47:40,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 10:47:40,163 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 10:47:40,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 10:47:40,163 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:40,164 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-30 10:47:40,164 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:40,164 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:40,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1958223032, now seen corresponding path program 19 times [2018-09-30 10:47:40,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:40,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:40,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:40,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:40,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:40,404 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:40,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:40,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:40,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:40,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:40,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:40,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 10:47:40,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:47:40,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:47:40,556 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:40,556 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-30 10:47:40,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:40,712 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 10:47:40,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 10:47:40,713 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-30 10:47:40,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:40,714 INFO L225 Difference]: With dead ends: 26 [2018-09-30 10:47:40,714 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 10:47:40,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:40,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 10:47:40,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 10:47:40,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:47:40,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 10:47:40,717 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-30 10:47:40,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:40,717 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 10:47:40,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:47:40,718 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 10:47:40,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 10:47:40,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:40,718 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-30 10:47:40,719 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:40,719 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:40,719 INFO L82 PathProgramCache]: Analyzing trace with hash -575373823, now seen corresponding path program 20 times [2018-09-30 10:47:40,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:40,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:40,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:40,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:40,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:40,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:41,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:41,051 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:41,059 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:47:41,074 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:47:41,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:41,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:41,199 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:41,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:41,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 10:47:41,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 10:47:41,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 10:47:41,228 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:41,228 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-30 10:47:41,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:41,401 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 10:47:41,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:47:41,402 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-30 10:47:41,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:41,403 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:47:41,403 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:47:41,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:41,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:47:41,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 10:47:41,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 10:47:41,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 10:47:41,406 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-30 10:47:41,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:41,406 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 10:47:41,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 10:47:41,407 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 10:47:41,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 10:47:41,407 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:41,407 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-30 10:47:41,408 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:41,408 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:41,408 INFO L82 PathProgramCache]: Analyzing trace with hash -656721304, now seen corresponding path program 21 times [2018-09-30 10:47:41,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:41,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:41,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:41,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:41,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:41,669 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:41,669 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:41,682 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:47:41,715 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 10:47:41,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:41,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:41,975 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:41,976 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 10:47:41,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 10:47:41,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 10:47:41,977 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:41,977 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-30 10:47:42,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:42,258 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 10:47:42,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:47:42,260 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-30 10:47:42,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:42,261 INFO L225 Difference]: With dead ends: 28 [2018-09-30 10:47:42,261 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 10:47:42,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:42,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 10:47:42,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 10:47:42,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:47:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 10:47:42,266 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-30 10:47:42,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:42,266 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 10:47:42,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 10:47:42,266 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 10:47:42,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 10:47:42,267 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:42,267 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-30 10:47:42,267 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:42,267 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:42,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1116474081, now seen corresponding path program 22 times [2018-09-30 10:47:42,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:42,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:42,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:42,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:42,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:42,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:42,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:42,463 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:47:42,482 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:47:42,482 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:42,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:42,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:42,661 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 10:47:42,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 10:47:42,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 10:47:42,661 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:42,662 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-30 10:47:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:42,968 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 10:47:42,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:47:42,969 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-30 10:47:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:42,969 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:47:42,969 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:47:42,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:42,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:47:42,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 10:47:42,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 10:47:42,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 10:47:42,974 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-30 10:47:42,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:42,974 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 10:47:42,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 10:47:42,974 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 10:47:42,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 10:47:42,975 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:42,975 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-30 10:47:42,975 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:42,975 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:42,975 INFO L82 PathProgramCache]: Analyzing trace with hash 250956168, now seen corresponding path program 23 times [2018-09-30 10:47:42,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:42,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:42,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:42,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:42,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:43,137 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:43,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:43,138 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:43,145 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:47:43,169 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 10:47:43,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:43,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:43,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:43,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 10:47:43,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 10:47:43,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 10:47:43,305 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:43,305 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-30 10:47:43,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:43,624 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 10:47:43,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 10:47:43,625 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-30 10:47:43,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:43,626 INFO L225 Difference]: With dead ends: 30 [2018-09-30 10:47:43,626 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 10:47:43,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:43,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 10:47:43,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 10:47:43,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:47:43,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 10:47:43,631 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-30 10:47:43,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:43,632 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 10:47:43,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 10:47:43,632 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 10:47:43,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 10:47:43,634 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:43,634 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-30 10:47:43,634 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:43,634 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:43,634 INFO L82 PathProgramCache]: Analyzing trace with hash -810295359, now seen corresponding path program 24 times [2018-09-30 10:47:43,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:43,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:43,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:43,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:43,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:43,807 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:43,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:43,814 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:47:43,840 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 10:47:43,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:43,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:43,965 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:43,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 10:47:43,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 10:47:43,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 10:47:43,966 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:43,967 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-30 10:47:44,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:44,273 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 10:47:44,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:47:44,273 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-30 10:47:44,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:44,274 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:47:44,274 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:47:44,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:44,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:47:44,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 10:47:44,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 10:47:44,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 10:47:44,278 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-30 10:47:44,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:44,278 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 10:47:44,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 10:47:44,279 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 10:47:44,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 10:47:44,279 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:44,279 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-30 10:47:44,280 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:44,280 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:44,280 INFO L82 PathProgramCache]: Analyzing trace with hash 650645672, now seen corresponding path program 25 times [2018-09-30 10:47:44,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:44,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:44,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:44,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:44,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:44,560 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:44,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:44,561 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:44,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:44,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:44,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:44,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 10:47:44,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 10:47:44,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 10:47:44,689 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:44,689 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-30 10:47:44,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:44,875 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 10:47:44,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 10:47:44,876 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-30 10:47:44,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:44,876 INFO L225 Difference]: With dead ends: 32 [2018-09-30 10:47:44,876 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 10:47:44,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:44,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 10:47:44,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 10:47:44,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:47:44,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 10:47:44,881 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-30 10:47:44,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:44,881 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 10:47:44,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 10:47:44,881 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 10:47:44,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 10:47:44,882 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:44,882 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-30 10:47:44,882 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:44,883 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:44,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1304822623, now seen corresponding path program 26 times [2018-09-30 10:47:44,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:44,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:44,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:44,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:44,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:45,197 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:45,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:45,205 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:47:45,223 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:47:45,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:45,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:45,297 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:45,297 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 10:47:45,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 10:47:45,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 10:47:45,298 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:45,298 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-30 10:47:45,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:45,528 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 10:47:45,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:47:45,529 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-30 10:47:45,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:45,529 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:47:45,529 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:47:45,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:45,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:47:45,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 10:47:45,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 10:47:45,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 10:47:45,534 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-30 10:47:45,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:45,534 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 10:47:45,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 10:47:45,534 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 10:47:45,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 10:47:45,535 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:45,535 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-30 10:47:45,535 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:45,535 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:45,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1794797624, now seen corresponding path program 27 times [2018-09-30 10:47:45,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:45,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:45,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:45,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:45,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:46,810 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:46,810 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:46,818 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:47:46,841 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 10:47:46,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:46,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:46,987 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:46,987 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 10:47:46,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 10:47:46,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 10:47:46,988 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:46,988 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-30 10:47:47,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:47,402 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 10:47:47,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 10:47:47,403 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-30 10:47:47,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:47,403 INFO L225 Difference]: With dead ends: 34 [2018-09-30 10:47:47,404 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 10:47:47,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:47,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 10:47:47,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 10:47:47,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:47:47,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 10:47:47,409 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-30 10:47:47,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:47,409 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 10:47:47,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 10:47:47,409 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 10:47:47,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 10:47:47,410 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:47,410 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-30 10:47:47,410 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:47,410 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:47,410 INFO L82 PathProgramCache]: Analyzing trace with hash 195846529, now seen corresponding path program 28 times [2018-09-30 10:47:47,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:47,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:47,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:47,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:47,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:47,660 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:47,660 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:47,676 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:47:47,702 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:47:47,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:47,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:47,757 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:47,777 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:47,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 10:47:47,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 10:47:47,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 10:47:47,778 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:47,778 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-30 10:47:47,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:47,926 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 10:47:47,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:47:47,926 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-30 10:47:47,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:47,927 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:47:47,927 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:47:47,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:47,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:47:47,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 10:47:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 10:47:47,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 10:47:47,934 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-30 10:47:47,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:47,934 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 10:47:47,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 10:47:47,934 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 10:47:47,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 10:47:47,937 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:47,937 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-30 10:47:47,937 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:47,937 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:47,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1776273128, now seen corresponding path program 29 times [2018-09-30 10:47:47,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:47,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:47,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:47,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:47,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:48,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:48,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:48,134 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:47:48,254 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 10:47:48,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:48,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:48,350 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:48,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 10:47:48,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 10:47:48,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 10:47:48,351 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:48,351 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-30 10:47:48,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:48,496 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-30 10:47:48,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:47:48,496 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-30 10:47:48,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:48,497 INFO L225 Difference]: With dead ends: 36 [2018-09-30 10:47:48,497 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 10:47:48,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:48,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 10:47:48,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 10:47:48,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:47:48,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 10:47:48,501 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-30 10:47:48,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:48,501 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 10:47:48,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 10:47:48,501 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 10:47:48,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 10:47:48,502 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:48,502 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-30 10:47:48,502 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:48,502 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:48,502 INFO L82 PathProgramCache]: Analyzing trace with hash -770109855, now seen corresponding path program 30 times [2018-09-30 10:47:48,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:48,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:48,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:48,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:48,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:49,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:49,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:49,048 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:47:49,071 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 10:47:49,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:49,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:49,249 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:49,249 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 10:47:49,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 10:47:49,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 10:47:49,250 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:49,250 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-30 10:47:49,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:49,513 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 10:47:49,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 10:47:49,513 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-30 10:47:49,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:49,514 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:47:49,514 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:47:49,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:49,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:47:49,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 10:47:49,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 10:47:49,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 10:47:49,517 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-30 10:47:49,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:49,518 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 10:47:49,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 10:47:49,518 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 10:47:49,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 10:47:49,519 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:49,519 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-30 10:47:49,519 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:49,519 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:49,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1896396296, now seen corresponding path program 31 times [2018-09-30 10:47:49,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:49,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:49,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:49,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:49,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:49,796 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:49,796 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:49,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:49,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:49,912 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:49,912 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 10:47:49,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 10:47:49,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 10:47:49,913 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:49,913 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-30 10:47:50,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:50,157 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-30 10:47:50,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 10:47:50,157 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-30 10:47:50,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:50,158 INFO L225 Difference]: With dead ends: 38 [2018-09-30 10:47:50,158 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 10:47:50,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:50,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 10:47:50,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 10:47:50,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 10:47:50,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 10:47:50,162 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-30 10:47:50,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:50,162 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 10:47:50,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 10:47:50,163 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 10:47:50,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 10:47:50,163 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:50,163 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-30 10:47:50,163 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:50,164 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:50,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1341258943, now seen corresponding path program 32 times [2018-09-30 10:47:50,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:50,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:50,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:50,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:50,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:50,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:50,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:50,467 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:47:50,485 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:47:50,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:50,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:50,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:50,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 10:47:50,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 10:47:50,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 10:47:50,579 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:50,579 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-30 10:47:50,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:50,821 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 10:47:50,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:47:50,822 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-30 10:47:50,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:50,823 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:47:50,823 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:47:50,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:50,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:47:50,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 10:47:50,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 10:47:50,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 10:47:50,827 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-30 10:47:50,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:50,827 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 10:47:50,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 10:47:50,828 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 10:47:50,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 10:47:50,828 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:50,828 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-30 10:47:50,828 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:50,828 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:50,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1370643752, now seen corresponding path program 33 times [2018-09-30 10:47:50,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:50,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:50,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:50,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:50,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:50,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:51,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:51,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:51,951 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:47:51,980 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 10:47:51,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:51,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:52,094 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:52,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 10:47:52,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 10:47:52,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 10:47:52,095 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:52,095 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-30 10:47:52,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:52,275 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-30 10:47:52,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 10:47:52,276 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-30 10:47:52,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:52,277 INFO L225 Difference]: With dead ends: 40 [2018-09-30 10:47:52,277 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 10:47:52,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:52,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 10:47:52,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 10:47:52,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 10:47:52,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 10:47:52,280 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-30 10:47:52,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:52,280 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 10:47:52,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 10:47:52,280 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 10:47:52,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 10:47:52,281 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:52,281 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-30 10:47:52,281 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:52,281 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:52,281 INFO L82 PathProgramCache]: Analyzing trace with hash -459718623, now seen corresponding path program 34 times [2018-09-30 10:47:52,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:52,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:52,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:52,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:52,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:52,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:52,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:52,733 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:47:52,756 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:47:52,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:52,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:52,967 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:52,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 10:47:52,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 10:47:52,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 10:47:52,968 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:52,968 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-30 10:47:53,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:53,218 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 10:47:53,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 10:47:53,219 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-30 10:47:53,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:53,219 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:47:53,220 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:47:53,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:53,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:47:53,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 10:47:53,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 10:47:53,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 10:47:53,224 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-30 10:47:53,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:53,224 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 10:47:53,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 10:47:53,224 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 10:47:53,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 10:47:53,225 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:53,225 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-30 10:47:53,225 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:53,225 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:53,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1366377400, now seen corresponding path program 35 times [2018-09-30 10:47:53,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:53,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:53,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:53,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:53,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:53,452 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:53,452 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:53,461 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:47:53,498 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 10:47:53,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:53,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:53,587 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:53,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 10:47:53,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 10:47:53,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 10:47:53,588 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:53,588 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-30 10:47:53,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:53,875 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-30 10:47:53,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 10:47:53,876 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-30 10:47:53,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:53,876 INFO L225 Difference]: With dead ends: 42 [2018-09-30 10:47:53,877 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 10:47:53,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:53,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 10:47:53,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 10:47:53,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 10:47:53,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 10:47:53,880 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-30 10:47:53,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:53,881 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 10:47:53,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 10:47:53,881 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 10:47:53,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 10:47:53,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:53,881 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-30 10:47:53,881 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:53,882 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:53,882 INFO L82 PathProgramCache]: Analyzing trace with hash 591971585, now seen corresponding path program 36 times [2018-09-30 10:47:53,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:53,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:53,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:53,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:53,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:53,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:54,191 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:54,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:54,199 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:47:54,231 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 10:47:54,231 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:54,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:55,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:55,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 10:47:55,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 10:47:55,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 10:47:55,309 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:55,309 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-30 10:47:55,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:55,691 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 10:47:55,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:47:55,692 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-30 10:47:55,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:55,693 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:47:55,693 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:47:55,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:55,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:47:55,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 10:47:55,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 10:47:55,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 10:47:55,695 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-30 10:47:55,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:55,695 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 10:47:55,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 10:47:55,695 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 10:47:55,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 10:47:55,696 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:55,696 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-30 10:47:55,696 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:55,696 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:55,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1171247976, now seen corresponding path program 37 times [2018-09-30 10:47:55,696 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:55,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:55,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:55,697 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:55,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:55,945 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:55,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:55,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:55,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:55,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:56,094 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:56,095 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 10:47:56,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 10:47:56,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 10:47:56,095 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:56,095 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-30 10:47:56,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:56,368 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-30 10:47:56,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 10:47:56,369 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-30 10:47:56,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:56,370 INFO L225 Difference]: With dead ends: 44 [2018-09-30 10:47:56,370 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 10:47:56,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:56,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 10:47:56,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 10:47:56,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 10:47:56,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 10:47:56,373 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-30 10:47:56,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:56,373 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 10:47:56,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 10:47:56,373 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 10:47:56,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 10:47:56,374 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:56,374 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-30 10:47:56,374 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:56,374 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:56,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1948946913, now seen corresponding path program 38 times [2018-09-30 10:47:56,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:56,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:56,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:56,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:56,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:56,857 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:56,858 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:56,858 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:56,865 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:47:56,888 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:47:56,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:56,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:56,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:56,992 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 10:47:56,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 10:47:56,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 10:47:56,993 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:56,993 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-30 10:47:57,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:57,269 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 10:47:57,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 10:47:57,269 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-30 10:47:57,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:57,270 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:47:57,270 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:47:57,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:57,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:47:57,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 10:47:57,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 10:47:57,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 10:47:57,274 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-30 10:47:57,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:57,274 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 10:47:57,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 10:47:57,274 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 10:47:57,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 10:47:57,275 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:57,275 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-30 10:47:57,275 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:57,275 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:57,275 INFO L82 PathProgramCache]: Analyzing trace with hash 287810184, now seen corresponding path program 39 times [2018-09-30 10:47:57,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:57,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:57,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:57,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:57,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:57,493 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:57,493 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 [2018-09-30 10:47:57,501 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:47:57,531 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 10:47:57,532 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:57,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:57,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:57,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 10:47:57,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 10:47:57,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 10:47:57,629 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:57,629 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-30 10:47:57,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:57,868 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-30 10:47:57,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 10:47:57,869 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-30 10:47:57,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:57,869 INFO L225 Difference]: With dead ends: 46 [2018-09-30 10:47:57,869 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 10:47:57,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:57,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 10:47:57,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 10:47:57,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 10:47:57,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 10:47:57,871 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-30 10:47:57,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:57,872 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 10:47:57,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 10:47:57,872 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 10:47:57,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 10:47:57,872 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:57,872 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-30 10:47:57,872 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:57,873 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:57,873 INFO L82 PathProgramCache]: Analyzing trace with hash 332179137, now seen corresponding path program 40 times [2018-09-30 10:47:57,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:57,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:57,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:57,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:57,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:58,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:58,501 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:47:58,509 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:47:58,536 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:47:58,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:58,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:58,664 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:58,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 10:47:58,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 10:47:58,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 10:47:58,665 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:58,665 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-30 10:47:59,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:59,038 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 10:47:59,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 10:47:59,038 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-30 10:47:59,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:59,039 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:47:59,039 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:47:59,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:59,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:47:59,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 10:47:59,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 10:47:59,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 10:47:59,042 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-30 10:47:59,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:59,043 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 10:47:59,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 10:47:59,043 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 10:47:59,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 10:47:59,043 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:59,043 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-30 10:47:59,044 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:59,044 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:59,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1707616680, now seen corresponding path program 41 times [2018-09-30 10:47:59,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:59,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:59,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:59,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:59,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:59,368 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:59,368 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 [2018-09-30 10:47:59,376 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:47:59,410 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 10:47:59,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:59,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:59,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:59,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 10:47:59,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 10:47:59,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 10:47:59,616 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:59,616 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-30 10:48:00,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:00,031 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-30 10:48:00,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 10:48:00,032 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-30 10:48:00,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:00,033 INFO L225 Difference]: With dead ends: 48 [2018-09-30 10:48:00,033 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 10:48:00,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:00,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 10:48:00,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 10:48:00,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 10:48:00,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 10:48:00,035 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-30 10:48:00,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:00,036 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 10:48:00,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 10:48:00,036 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 10:48:00,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 10:48:00,037 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:00,037 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-30 10:48:00,037 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:00,037 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:00,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1396507553, now seen corresponding path program 42 times [2018-09-30 10:48:00,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:00,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:00,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:00,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:00,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:00,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:00,293 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:00,293 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:00,293 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 [2018-09-30 10:48:00,304 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:48:00,343 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 10:48:00,343 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:00,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:00,512 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:00,532 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:00,532 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 10:48:00,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 10:48:00,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 10:48:00,533 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:00,533 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-30 10:48:00,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:00,847 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 10:48:00,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 10:48:00,848 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-30 10:48:00,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:00,849 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:48:00,849 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:48:00,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:00,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:48:00,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 10:48:00,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 10:48:00,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 10:48:00,851 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-30 10:48:00,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:00,851 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 10:48:00,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 10:48:00,852 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 10:48:00,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 10:48:00,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:00,853 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-30 10:48:00,853 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:00,853 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:00,853 INFO L82 PathProgramCache]: Analyzing trace with hash 342059208, now seen corresponding path program 43 times [2018-09-30 10:48:00,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:00,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:00,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:00,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:00,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:01,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:01,141 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 [2018-09-30 10:48:01,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:01,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:01,297 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:01,298 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 10:48:01,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 10:48:01,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 10:48:01,298 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:01,298 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-30 10:48:01,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:01,683 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-30 10:48:01,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 10:48:01,684 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-30 10:48:01,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:01,685 INFO L225 Difference]: With dead ends: 50 [2018-09-30 10:48:01,685 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 10:48:01,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:01,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 10:48:01,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 10:48:01,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 10:48:01,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 10:48:01,688 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-30 10:48:01,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:01,688 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 10:48:01,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 10:48:01,688 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 10:48:01,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 10:48:01,688 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:01,689 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-30 10:48:01,689 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:01,689 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:01,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2013898881, now seen corresponding path program 44 times [2018-09-30 10:48:01,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:01,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:01,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:01,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:01,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:01,929 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:01,929 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 [2018-09-30 10:48:01,940 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:48:01,975 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:48:01,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:01,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:02,094 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:02,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 10:48:02,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 10:48:02,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 10:48:02,094 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:02,095 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-30 10:48:02,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:02,415 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 10:48:02,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:48:02,415 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-30 10:48:02,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:02,416 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:48:02,416 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:48:02,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:02,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:48:02,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 10:48:02,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 10:48:02,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 10:48:02,419 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-30 10:48:02,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:02,419 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 10:48:02,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 10:48:02,420 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 10:48:02,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 10:48:02,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:02,420 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-30 10:48:02,421 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:02,421 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:02,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1993646104, now seen corresponding path program 45 times [2018-09-30 10:48:02,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:02,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:02,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:02,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:02,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:02,781 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:02,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:48:02,790 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:48:02,826 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 10:48:02,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:02,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:02,955 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:02,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 10:48:02,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 10:48:02,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 10:48:02,956 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:02,956 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-30 10:48:03,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:03,416 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-30 10:48:03,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 10:48:03,417 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-30 10:48:03,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:03,417 INFO L225 Difference]: With dead ends: 52 [2018-09-30 10:48:03,418 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 10:48:03,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:03,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 10:48:03,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 10:48:03,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 10:48:03,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 10:48:03,419 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-30 10:48:03,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:03,420 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 10:48:03,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 10:48:03,420 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 10:48:03,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 10:48:03,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:03,420 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-30 10:48:03,420 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:03,420 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:03,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1673489055, now seen corresponding path program 46 times [2018-09-30 10:48:03,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:03,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:03,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:03,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:03,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:04,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:04,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:48:04,998 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:48:05,025 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:48:05,026 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:05,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:05,147 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:05,147 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 10:48:05,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 10:48:05,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 10:48:05,148 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:05,148 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-30 10:48:05,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:05,487 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 10:48:05,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:48:05,488 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-30 10:48:05,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:05,488 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:48:05,489 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:48:05,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:05,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:48:05,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 10:48:05,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 10:48:05,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 10:48:05,491 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-30 10:48:05,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:05,492 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 10:48:05,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 10:48:05,492 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 10:48:05,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 10:48:05,493 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:05,493 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-30 10:48:05,493 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:05,493 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:05,493 INFO L82 PathProgramCache]: Analyzing trace with hash -338555128, now seen corresponding path program 47 times [2018-09-30 10:48:05,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:05,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:05,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:05,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:05,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:05,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:06,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:06,041 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:06,041 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 [2018-09-30 10:48:06,048 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:48:06,084 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 10:48:06,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:06,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:06,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:06,199 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:06,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 10:48:06,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 10:48:06,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 10:48:06,200 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:06,200 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-30 10:48:06,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:06,490 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-30 10:48:06,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 10:48:06,490 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-30 10:48:06,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:06,491 INFO L225 Difference]: With dead ends: 54 [2018-09-30 10:48:06,491 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 10:48:06,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:06,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 10:48:06,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 10:48:06,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 10:48:06,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 10:48:06,494 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-30 10:48:06,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:06,494 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 10:48:06,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 10:48:06,494 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 10:48:06,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 10:48:06,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:06,495 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-30 10:48:06,495 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:06,495 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:06,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1905276351, now seen corresponding path program 48 times [2018-09-30 10:48:06,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:06,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:06,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:06,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:06,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:06,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:06,823 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 [2018-09-30 10:48:06,829 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:48:06,877 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 10:48:06,877 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:06,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:06,988 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:06,988 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 10:48:06,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 10:48:06,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 10:48:06,989 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:06,989 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-30 10:48:07,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:07,254 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 10:48:07,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 10:48:07,254 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-30 10:48:07,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:07,255 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:48:07,255 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:48:07,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:07,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:48:07,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 10:48:07,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 10:48:07,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 10:48:07,257 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-30 10:48:07,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:07,258 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 10:48:07,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 10:48:07,258 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 10:48:07,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 10:48:07,258 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:07,258 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-30 10:48:07,258 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:07,258 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:07,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1065973288, now seen corresponding path program 49 times [2018-09-30 10:48:07,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:07,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:07,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:07,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:07,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:07,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:07,637 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 [2018-09-30 10:48:07,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:07,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:07,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:07,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:07,793 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:07,793 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 10:48:07,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 10:48:07,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 10:48:07,794 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:07,794 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-30 10:48:08,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:08,072 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-30 10:48:08,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 10:48:08,073 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-30 10:48:08,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:08,074 INFO L225 Difference]: With dead ends: 56 [2018-09-30 10:48:08,074 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 10:48:08,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:08,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 10:48:08,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 10:48:08,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 10:48:08,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 10:48:08,076 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-30 10:48:08,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:08,076 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 10:48:08,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 10:48:08,076 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 10:48:08,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 10:48:08,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:08,077 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-30 10:48:08,077 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:08,077 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:08,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1314568415, now seen corresponding path program 50 times [2018-09-30 10:48:08,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:08,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:08,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:08,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:08,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:08,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:08,461 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:08,462 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 [2018-09-30 10:48:08,471 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:48:08,494 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:48:08,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:08,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:08,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:08,650 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:08,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 10:48:08,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 10:48:08,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 10:48:08,651 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:08,651 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-30 10:48:08,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:08,958 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 10:48:08,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 10:48:08,958 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-30 10:48:08,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:08,959 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:48:08,959 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:48:08,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:08,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:48:08,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 10:48:08,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 10:48:08,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 10:48:08,962 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-30 10:48:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:08,962 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 10:48:08,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 10:48:08,962 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 10:48:08,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 10:48:08,962 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:08,963 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-30 10:48:08,963 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:08,963 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:08,963 INFO L82 PathProgramCache]: Analyzing trace with hash -2096917176, now seen corresponding path program 51 times [2018-09-30 10:48:08,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:08,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:08,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:08,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:08,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:09,227 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:09,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:48:09,234 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:48:09,274 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-30 10:48:09,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:09,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:09,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:09,647 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:09,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 10:48:09,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 10:48:09,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 10:48:09,648 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:09,649 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-30 10:48:10,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:10,205 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-30 10:48:10,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 10:48:10,205 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-30 10:48:10,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:10,206 INFO L225 Difference]: With dead ends: 58 [2018-09-30 10:48:10,206 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 10:48:10,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:10,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 10:48:10,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 10:48:10,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 10:48:10,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 10:48:10,209 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-30 10:48:10,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:10,210 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 10:48:10,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 10:48:10,210 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 10:48:10,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 10:48:10,211 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:10,211 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-30 10:48:10,211 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:10,211 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:10,211 INFO L82 PathProgramCache]: Analyzing trace with hash -579924991, now seen corresponding path program 52 times [2018-09-30 10:48:10,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:10,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:10,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:10,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:10,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:10,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:10,532 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 [2018-09-30 10:48:10,540 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:48:10,573 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:48:10,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:10,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:10,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:10,712 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:10,712 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 10:48:10,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 10:48:10,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 10:48:10,713 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:10,713 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-30 10:48:11,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:11,113 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 10:48:11,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:48:11,114 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-30 10:48:11,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:11,115 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:48:11,115 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:48:11,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:11,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:48:11,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 10:48:11,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 10:48:11,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 10:48:11,117 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-30 10:48:11,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:11,117 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 10:48:11,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 10:48:11,118 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 10:48:11,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 10:48:11,118 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:11,118 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-30 10:48:11,118 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:11,119 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:11,119 INFO L82 PathProgramCache]: Analyzing trace with hash -797807512, now seen corresponding path program 53 times [2018-09-30 10:48:11,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:11,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:11,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:11,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:11,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:11,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:11,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:11,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:11,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:48:11,745 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:48:11,786 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 10:48:11,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:11,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:11,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:11,947 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:11,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 10:48:11,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 10:48:11,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 10:48:11,948 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:11,948 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-30 10:48:12,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:12,331 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-30 10:48:12,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 10:48:12,332 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-30 10:48:12,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:12,333 INFO L225 Difference]: With dead ends: 60 [2018-09-30 10:48:12,333 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 10:48:12,333 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:12,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 10:48:12,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 10:48:12,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 10:48:12,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 10:48:12,335 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-30 10:48:12,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:12,336 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 10:48:12,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 10:48:12,336 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 10:48:12,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 10:48:12,336 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:12,336 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-30 10:48:12,336 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:12,336 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:12,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1037768929, now seen corresponding path program 54 times [2018-09-30 10:48:12,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:12,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:12,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:12,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:12,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:12,761 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:12,761 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 [2018-09-30 10:48:12,768 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:48:12,808 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-30 10:48:12,808 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:12,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:13,041 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:13,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 10:48:13,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 10:48:13,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 10:48:13,042 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:13,042 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-30 10:48:13,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:13,405 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 10:48:13,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 10:48:13,406 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-30 10:48:13,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:13,406 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:48:13,406 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:48:13,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:13,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:48:13,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 10:48:13,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 10:48:13,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 10:48:13,408 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-30 10:48:13,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:13,409 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 10:48:13,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 10:48:13,409 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 10:48:13,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 10:48:13,409 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:13,410 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-30 10:48:13,410 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:13,410 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:13,410 INFO L82 PathProgramCache]: Analyzing trace with hash 2106063752, now seen corresponding path program 55 times [2018-09-30 10:48:13,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:13,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:13,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:13,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:13,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:13,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:13,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:13,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:48:13,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:13,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:13,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:13,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 10:48:13,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 10:48:13,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 10:48:13,908 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:13,908 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-30 10:48:14,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:14,327 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-30 10:48:14,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 10:48:14,328 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-30 10:48:14,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:14,329 INFO L225 Difference]: With dead ends: 62 [2018-09-30 10:48:14,329 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 10:48:14,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:14,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 10:48:14,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 10:48:14,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 10:48:14,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 10:48:14,333 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-30 10:48:14,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:14,333 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 10:48:14,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 10:48:14,333 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 10:48:14,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 10:48:14,333 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:14,333 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-30 10:48:14,334 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:14,334 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:14,334 INFO L82 PathProgramCache]: Analyzing trace with hash 863464897, now seen corresponding path program 56 times [2018-09-30 10:48:14,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:14,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:14,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:14,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:14,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:14,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:14,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:14,671 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:14,671 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 [2018-09-30 10:48:14,679 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:48:14,710 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:48:14,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:14,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:14,836 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:14,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 10:48:14,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 10:48:14,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 10:48:14,838 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:14,838 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-30 10:48:15,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:15,398 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 10:48:15,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 10:48:15,399 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-30 10:48:15,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:15,400 INFO L225 Difference]: With dead ends: 63 [2018-09-30 10:48:15,400 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 10:48:15,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:15,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 10:48:15,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 10:48:15,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 10:48:15,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 10:48:15,403 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-30 10:48:15,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:15,403 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 10:48:15,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 10:48:15,403 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 10:48:15,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 10:48:15,403 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:15,404 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-30 10:48:15,404 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:15,404 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:15,404 INFO L82 PathProgramCache]: Analyzing trace with hash 997606056, now seen corresponding path program 57 times [2018-09-30 10:48:15,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:15,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:15,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:15,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:15,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:15,807 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:15,807 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 [2018-09-30 10:48:15,815 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:48:15,860 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-30 10:48:15,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:15,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:15,990 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:15,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 10:48:15,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 10:48:15,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 10:48:15,991 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:15,991 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-30 10:48:16,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:16,412 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-30 10:48:16,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 10:48:16,413 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-30 10:48:16,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:16,414 INFO L225 Difference]: With dead ends: 64 [2018-09-30 10:48:16,414 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 10:48:16,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:16,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 10:48:16,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 10:48:16,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 10:48:16,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 10:48:16,416 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-30 10:48:16,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:16,416 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 10:48:16,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 10:48:16,416 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 10:48:16,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 10:48:16,417 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:16,417 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-30 10:48:16,417 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:16,417 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:16,417 INFO L82 PathProgramCache]: Analyzing trace with hash 861014689, now seen corresponding path program 58 times [2018-09-30 10:48:16,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:16,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:16,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:16,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:16,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:16,939 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:16,939 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 [2018-09-30 10:48:16,949 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:48:16,983 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:48:16,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:16,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:17,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:17,112 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:17,112 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 10:48:17,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 10:48:17,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 10:48:17,113 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:17,113 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-30 10:48:17,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:17,552 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 10:48:17,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 10:48:17,553 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-30 10:48:17,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:17,553 INFO L225 Difference]: With dead ends: 65 [2018-09-30 10:48:17,553 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 10:48:17,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:17,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 10:48:17,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 10:48:17,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 10:48:17,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 10:48:17,557 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-30 10:48:17,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:17,557 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 10:48:17,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 10:48:17,557 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 10:48:17,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 10:48:17,557 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:17,557 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-30 10:48:17,558 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:17,558 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:17,558 INFO L82 PathProgramCache]: Analyzing trace with hash 921649608, now seen corresponding path program 59 times [2018-09-30 10:48:17,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:17,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:17,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:17,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:17,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:18,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:18,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:18,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:48:18,276 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:48:18,321 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 10:48:18,322 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:18,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:18,515 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:18,515 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 10:48:18,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 10:48:18,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 10:48:18,516 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:18,516 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-30 10:48:18,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:18,970 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-30 10:48:18,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 10:48:18,970 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-30 10:48:18,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:18,971 INFO L225 Difference]: With dead ends: 66 [2018-09-30 10:48:18,971 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 10:48:18,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:18,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 10:48:18,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 10:48:18,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 10:48:18,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 10:48:18,973 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-30 10:48:18,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:18,973 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 10:48:18,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 10:48:18,973 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 10:48:18,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 10:48:18,973 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:18,974 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-30 10:48:18,974 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:18,974 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:18,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1493635199, now seen corresponding path program 60 times [2018-09-30 10:48:18,974 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:18,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:18,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:18,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:18,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:19,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:19,423 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:19,423 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 [2018-09-30 10:48:19,431 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:48:19,479 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 10:48:19,479 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:19,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:19,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:19,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 10:48:19,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 10:48:19,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 10:48:19,623 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:19,623 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-30 10:48:20,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:20,112 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 10:48:20,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 10:48:20,112 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-30 10:48:20,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:20,112 INFO L225 Difference]: With dead ends: 67 [2018-09-30 10:48:20,112 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 10:48:20,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:20,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 10:48:20,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 10:48:20,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 10:48:20,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 10:48:20,115 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-30 10:48:20,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:20,115 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 10:48:20,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 10:48:20,115 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 10:48:20,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 10:48:20,116 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:20,116 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-30 10:48:20,116 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:20,116 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:20,116 INFO L82 PathProgramCache]: Analyzing trace with hash 941947112, now seen corresponding path program 61 times [2018-09-30 10:48:20,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:20,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:20,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:20,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:20,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:20,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:20,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:48:20,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:20,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:20,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:20,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:20,792 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:20,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 10:48:20,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 10:48:20,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 10:48:20,794 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:20,794 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-30 10:48:21,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:21,234 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-30 10:48:21,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 10:48:21,235 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-30 10:48:21,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:21,236 INFO L225 Difference]: With dead ends: 68 [2018-09-30 10:48:21,236 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 10:48:21,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:21,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 10:48:21,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 10:48:21,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 10:48:21,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 10:48:21,238 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-30 10:48:21,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:21,238 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 10:48:21,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 10:48:21,238 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 10:48:21,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 10:48:21,238 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:21,238 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-30 10:48:21,239 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:21,239 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:21,239 INFO L82 PathProgramCache]: Analyzing trace with hash -864412575, now seen corresponding path program 62 times [2018-09-30 10:48:21,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:21,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:21,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:21,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:21,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:21,566 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:21,566 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 [2018-09-30 10:48:21,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:48:21,611 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:48:21,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:21,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:21,766 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:21,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 10:48:21,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 10:48:21,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 10:48:21,768 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:21,768 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-30 10:48:22,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:22,253 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 10:48:22,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 10:48:22,253 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-30 10:48:22,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:22,254 INFO L225 Difference]: With dead ends: 69 [2018-09-30 10:48:22,254 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 10:48:22,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:22,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 10:48:22,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 10:48:22,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 10:48:22,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 10:48:22,259 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-30 10:48:22,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:22,260 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 10:48:22,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 10:48:22,260 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 10:48:22,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 10:48:22,260 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:22,260 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-30 10:48:22,260 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:22,260 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:22,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1026988024, now seen corresponding path program 63 times [2018-09-30 10:48:22,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:22,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:22,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:22,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:22,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:22,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:22,644 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:22,644 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 [2018-09-30 10:48:22,653 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:48:22,704 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-30 10:48:22,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:22,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:22,853 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:22,853 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 10:48:22,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 10:48:22,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 10:48:22,854 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:22,854 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-30 10:48:23,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:23,410 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-30 10:48:23,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 10:48:23,411 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-30 10:48:23,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:23,412 INFO L225 Difference]: With dead ends: 70 [2018-09-30 10:48:23,412 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 10:48:23,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:23,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 10:48:23,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 10:48:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 10:48:23,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 10:48:23,414 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-30 10:48:23,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:23,415 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 10:48:23,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 10:48:23,415 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 10:48:23,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 10:48:23,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:23,416 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-30 10:48:23,416 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:23,416 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:23,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1771859647, now seen corresponding path program 64 times [2018-09-30 10:48:23,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:23,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:23,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:23,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:23,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:23,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:23,824 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:23,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:48:23,842 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:48:23,895 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:48:23,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:23,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:24,050 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:24,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 10:48:24,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 10:48:24,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 10:48:24,052 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:24,052 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-30 10:48:24,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:24,556 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 10:48:24,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 10:48:24,557 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-30 10:48:24,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:24,557 INFO L225 Difference]: With dead ends: 71 [2018-09-30 10:48:24,557 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 10:48:24,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:24,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 10:48:24,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 10:48:24,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 10:48:24,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 10:48:24,559 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-30 10:48:24,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:24,560 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 10:48:24,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 10:48:24,560 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 10:48:24,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 10:48:24,560 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:24,560 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-30 10:48:24,560 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:24,560 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:24,561 INFO L82 PathProgramCache]: Analyzing trace with hash 906923816, now seen corresponding path program 65 times [2018-09-30 10:48:24,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:24,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:24,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:24,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:24,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:24,906 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:24,906 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 [2018-09-30 10:48:24,913 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:48:24,972 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 10:48:24,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:24,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:25,198 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:25,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 10:48:25,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 10:48:25,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 10:48:25,200 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:25,200 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-30 10:48:25,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:25,906 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-30 10:48:25,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 10:48:25,907 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-30 10:48:25,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:25,907 INFO L225 Difference]: With dead ends: 72 [2018-09-30 10:48:25,907 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 10:48:25,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:25,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 10:48:25,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 10:48:25,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 10:48:25,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 10:48:25,909 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-30 10:48:25,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:25,910 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 10:48:25,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 10:48:25,910 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 10:48:25,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 10:48:25,910 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:25,910 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-30 10:48:25,910 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:25,910 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:25,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1950134751, now seen corresponding path program 66 times [2018-09-30 10:48:25,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:25,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:25,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:25,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:25,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:26,276 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:26,276 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 [2018-09-30 10:48:26,284 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:48:26,337 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-30 10:48:26,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:26,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:26,496 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:26,496 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 10:48:26,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 10:48:26,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 10:48:26,497 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:26,497 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-09-30 10:48:26,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:26,870 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 10:48:26,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 10:48:26,870 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-09-30 10:48:26,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:26,871 INFO L225 Difference]: With dead ends: 73 [2018-09-30 10:48:26,871 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 10:48:26,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:26,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 10:48:26,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 10:48:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 10:48:26,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 10:48:26,873 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-30 10:48:26,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:26,873 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 10:48:26,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 10:48:26,873 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 10:48:26,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 10:48:26,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:26,874 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-30 10:48:26,874 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:26,874 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:26,874 INFO L82 PathProgramCache]: Analyzing trace with hash -324637112, now seen corresponding path program 67 times [2018-09-30 10:48:26,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:26,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:26,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:26,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:26,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:27,220 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:27,220 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 [2018-09-30 10:48:27,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:27,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:27,427 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:27,427 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 10:48:27,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 10:48:27,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 10:48:27,428 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:27,428 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-09-30 10:48:27,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:27,989 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-30 10:48:27,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 10:48:27,989 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-30 10:48:27,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:27,990 INFO L225 Difference]: With dead ends: 74 [2018-09-30 10:48:27,990 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 10:48:27,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:27,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 10:48:27,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 10:48:27,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 10:48:27,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 10:48:27,992 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-30 10:48:27,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:27,992 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 10:48:27,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 10:48:27,992 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 10:48:27,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 10:48:27,992 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:27,993 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-30 10:48:27,993 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:27,993 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:27,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1473817855, now seen corresponding path program 68 times [2018-09-30 10:48:27,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:27,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:27,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:27,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:27,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:28,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:28,344 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 [2018-09-30 10:48:28,351 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:48:28,391 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:48:28,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:28,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:28,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:28,548 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:28,548 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 10:48:28,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 10:48:28,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 10:48:28,549 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:28,550 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-09-30 10:48:28,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:28,953 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 10:48:28,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 10:48:28,954 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-09-30 10:48:28,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:28,954 INFO L225 Difference]: With dead ends: 75 [2018-09-30 10:48:28,955 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 10:48:28,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:28,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 10:48:28,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 10:48:28,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 10:48:28,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 10:48:28,957 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-30 10:48:28,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:28,958 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 10:48:28,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 10:48:28,958 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 10:48:28,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 10:48:28,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:28,959 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-30 10:48:28,959 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:28,959 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:28,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1556284776, now seen corresponding path program 69 times [2018-09-30 10:48:28,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:28,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:28,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:28,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:28,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:29,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:29,331 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 [2018-09-30 10:48:29,337 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:48:29,415 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-30 10:48:29,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:29,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:29,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:29,830 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 10:48:29,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 10:48:29,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 10:48:29,831 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:29,831 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-09-30 10:48:30,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:30,618 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-30 10:48:30,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 10:48:30,618 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-09-30 10:48:30,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:30,619 INFO L225 Difference]: With dead ends: 76 [2018-09-30 10:48:30,619 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 10:48:30,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:30,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 10:48:30,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 10:48:30,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 10:48:30,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-30 10:48:30,622 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-30 10:48:30,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:30,622 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-30 10:48:30,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 10:48:30,623 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-30 10:48:30,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 10:48:30,623 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:30,623 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-30 10:48:30,624 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:30,624 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:30,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1000185825, now seen corresponding path program 70 times [2018-09-30 10:48:30,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:30,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:30,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:30,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:30,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:30,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:31,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:31,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:31,085 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 [2018-09-30 10:48:31,093 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:48:31,151 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:48:31,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:31,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:31,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:31,422 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 10:48:31,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 10:48:31,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 10:48:31,423 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:31,424 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-09-30 10:48:31,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:31,908 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 10:48:31,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 10:48:31,909 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-09-30 10:48:31,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:31,909 INFO L225 Difference]: With dead ends: 77 [2018-09-30 10:48:31,909 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 10:48:31,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:31,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 10:48:31,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 10:48:31,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 10:48:31,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 10:48:31,912 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-30 10:48:31,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:31,912 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 10:48:31,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 10:48:31,912 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 10:48:31,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 10:48:31,913 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:31,913 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-30 10:48:31,913 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:31,913 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:31,914 INFO L82 PathProgramCache]: Analyzing trace with hash 940987528, now seen corresponding path program 71 times [2018-09-30 10:48:31,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:31,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:31,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:31,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:31,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:32,301 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:32,301 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:48:32,309 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:48:32,370 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 10:48:32,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:32,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:32,758 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:32,758 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 10:48:32,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 10:48:32,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 10:48:32,759 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:32,759 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-09-30 10:48:33,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:33,335 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-30 10:48:33,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 10:48:33,335 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-30 10:48:33,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:33,336 INFO L225 Difference]: With dead ends: 78 [2018-09-30 10:48:33,336 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 10:48:33,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:33,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 10:48:33,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 10:48:33,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 10:48:33,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-30 10:48:33,341 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-30 10:48:33,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:33,341 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-30 10:48:33,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 10:48:33,341 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-30 10:48:33,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 10:48:33,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:33,342 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-30 10:48:33,342 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:33,342 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:33,342 INFO L82 PathProgramCache]: Analyzing trace with hash -894159679, now seen corresponding path program 72 times [2018-09-30 10:48:33,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:33,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:33,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:33,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:33,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:33,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:33,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:33,847 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 [2018-09-30 10:48:33,855 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:48:33,910 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 10:48:33,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:33,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:34,104 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:34,104 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 10:48:34,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 10:48:34,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 10:48:34,105 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:34,105 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-09-30 10:48:34,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:34,717 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 10:48:34,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 10:48:34,718 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-09-30 10:48:34,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:34,718 INFO L225 Difference]: With dead ends: 79 [2018-09-30 10:48:34,718 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 10:48:34,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:34,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 10:48:34,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 10:48:34,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 10:48:34,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 10:48:34,721 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-30 10:48:34,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:34,721 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 10:48:34,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 10:48:34,721 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 10:48:34,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 10:48:34,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:34,722 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-30 10:48:34,722 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:34,722 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:34,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1949148248, now seen corresponding path program 73 times [2018-09-30 10:48:34,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:34,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:34,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:34,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:34,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:36,153 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:36,153 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 [2018-09-30 10:48:36,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:36,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:36,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:36,393 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:36,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 10:48:36,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 10:48:36,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 10:48:36,394 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:36,394 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-09-30 10:48:37,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:37,009 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-30 10:48:37,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 10:48:37,009 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-09-30 10:48:37,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:37,010 INFO L225 Difference]: With dead ends: 80 [2018-09-30 10:48:37,010 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 10:48:37,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:37,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 10:48:37,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 10:48:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 10:48:37,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-30 10:48:37,012 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-30 10:48:37,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:37,012 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-30 10:48:37,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 10:48:37,012 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-30 10:48:37,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 10:48:37,013 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:37,013 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-30 10:48:37,013 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:37,013 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:37,013 INFO L82 PathProgramCache]: Analyzing trace with hash -294055519, now seen corresponding path program 74 times [2018-09-30 10:48:37,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:37,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:37,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:37,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:37,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:37,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:37,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:37,428 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 [2018-09-30 10:48:37,434 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:48:37,476 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:48:37,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:37,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:37,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:37,649 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:37,649 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 10:48:37,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 10:48:37,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 10:48:37,650 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:37,650 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-09-30 10:48:38,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:38,294 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 10:48:38,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 10:48:38,294 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-09-30 10:48:38,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:38,295 INFO L225 Difference]: With dead ends: 81 [2018-09-30 10:48:38,295 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 10:48:38,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:38,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 10:48:38,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 10:48:38,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 10:48:38,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 10:48:38,297 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-30 10:48:38,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:38,297 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 10:48:38,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 10:48:38,298 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 10:48:38,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 10:48:38,298 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:38,298 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-30 10:48:38,298 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:38,298 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:38,298 INFO L82 PathProgramCache]: Analyzing trace with hash -525788472, now seen corresponding path program 75 times [2018-09-30 10:48:38,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:38,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:38,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:38,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:38,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:38,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:39,718 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:39,718 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 [2018-09-30 10:48:39,725 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:48:39,787 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-30 10:48:39,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:39,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:39,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:39,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 10:48:39,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 10:48:39,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 10:48:39,956 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:39,956 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-09-30 10:48:41,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:41,735 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-30 10:48:41,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 10:48:41,736 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-09-30 10:48:41,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:41,736 INFO L225 Difference]: With dead ends: 82 [2018-09-30 10:48:41,736 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 10:48:41,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:41,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 10:48:41,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 10:48:41,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 10:48:41,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-30 10:48:41,738 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-30 10:48:41,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:41,739 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-30 10:48:41,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 10:48:41,739 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-30 10:48:41,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 10:48:41,739 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:41,739 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-30 10:48:41,739 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:41,740 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:41,740 INFO L82 PathProgramCache]: Analyzing trace with hash 880424577, now seen corresponding path program 76 times [2018-09-30 10:48:41,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:41,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:41,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:41,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:41,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:42,316 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:42,316 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 [2018-09-30 10:48:42,323 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:48:42,382 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:48:42,383 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:42,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:42,652 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:42,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 10:48:42,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 10:48:42,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 10:48:42,653 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:42,653 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-09-30 10:48:44,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:44,167 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 10:48:44,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 10:48:44,167 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-09-30 10:48:44,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:44,168 INFO L225 Difference]: With dead ends: 83 [2018-09-30 10:48:44,168 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 10:48:44,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:44,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 10:48:44,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 10:48:44,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 10:48:44,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 10:48:44,171 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-30 10:48:44,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:44,171 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 10:48:44,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 10:48:44,171 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 10:48:44,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 10:48:44,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:44,172 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-30 10:48:44,172 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:44,172 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:44,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1523356136, now seen corresponding path program 77 times [2018-09-30 10:48:44,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:44,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:44,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:44,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:44,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:44,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:44,967 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 [2018-09-30 10:48:44,974 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:48:45,067 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-30 10:48:45,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:45,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:45,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:45,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 10:48:45,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 10:48:45,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 10:48:45,239 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:45,239 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-09-30 10:48:46,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:46,005 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-30 10:48:46,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 10:48:46,006 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-09-30 10:48:46,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:46,006 INFO L225 Difference]: With dead ends: 84 [2018-09-30 10:48:46,006 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 10:48:46,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:46,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 10:48:46,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 10:48:46,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 10:48:46,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-30 10:48:46,010 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-30 10:48:46,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:46,010 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-30 10:48:46,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 10:48:46,010 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-30 10:48:46,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 10:48:46,011 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:46,011 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-30 10:48:46,011 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:46,011 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:46,011 INFO L82 PathProgramCache]: Analyzing trace with hash -20602015, now seen corresponding path program 78 times [2018-09-30 10:48:46,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:46,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:46,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:46,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:46,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:46,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:47,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:47,245 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 [2018-09-30 10:48:47,252 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:48:47,685 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-30 10:48:47,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:47,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:47,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:47,863 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:47,864 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 10:48:47,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 10:48:47,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 10:48:47,865 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:47,865 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-09-30 10:48:48,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:48,341 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 10:48:48,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 10:48:48,341 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-09-30 10:48:48,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:48,342 INFO L225 Difference]: With dead ends: 85 [2018-09-30 10:48:48,342 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 10:48:48,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:48,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 10:48:48,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 10:48:48,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 10:48:48,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 10:48:48,345 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-30 10:48:48,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:48,345 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 10:48:48,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 10:48:48,345 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 10:48:48,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 10:48:48,346 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:48,346 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-30 10:48:48,346 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:48,346 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:48,346 INFO L82 PathProgramCache]: Analyzing trace with hash -638664440, now seen corresponding path program 79 times [2018-09-30 10:48:48,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:48,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:48,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:48,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:48,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:49,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:49,174 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 [2018-09-30 10:48:49,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:49,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:49,394 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:49,394 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 10:48:49,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 10:48:49,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 10:48:49,395 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:49,395 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-09-30 10:48:50,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:50,028 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-30 10:48:50,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 10:48:50,029 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-09-30 10:48:50,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:50,029 INFO L225 Difference]: With dead ends: 86 [2018-09-30 10:48:50,029 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 10:48:50,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:50,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 10:48:50,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-30 10:48:50,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 10:48:50,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-30 10:48:50,033 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-30 10:48:50,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:50,033 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-30 10:48:50,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 10:48:50,033 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-30 10:48:50,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 10:48:50,034 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:50,034 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-30 10:48:50,034 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:50,034 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:50,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1676236865, now seen corresponding path program 80 times [2018-09-30 10:48:50,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:50,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:50,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:50,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:50,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:50,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:50,525 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:50,525 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 [2018-09-30 10:48:50,533 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:48:50,575 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:48:50,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:50,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:52,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:52,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 10:48:52,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 10:48:52,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 10:48:52,046 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:52,046 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-09-30 10:48:52,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:52,789 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 10:48:52,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 10:48:52,789 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-09-30 10:48:52,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:52,789 INFO L225 Difference]: With dead ends: 87 [2018-09-30 10:48:52,790 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 10:48:52,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:52,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 10:48:52,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 10:48:52,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 10:48:52,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-30 10:48:52,792 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-30 10:48:52,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:52,792 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-30 10:48:52,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 10:48:52,792 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-30 10:48:52,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 10:48:52,793 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:52,793 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-30 10:48:52,793 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:52,793 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:52,793 INFO L82 PathProgramCache]: Analyzing trace with hash 423733288, now seen corresponding path program 81 times [2018-09-30 10:48:52,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:52,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:52,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:52,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:52,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:53,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:53,601 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:53,601 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 [2018-09-30 10:48:53,609 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:48:53,674 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-30 10:48:53,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:53,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:53,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:53,933 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 10:48:53,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 10:48:53,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 10:48:53,935 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:53,935 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-09-30 10:48:54,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:54,550 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-30 10:48:54,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 10:48:54,550 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-09-30 10:48:54,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:54,550 INFO L225 Difference]: With dead ends: 88 [2018-09-30 10:48:54,551 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 10:48:54,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:54,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 10:48:54,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 10:48:54,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 10:48:54,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-30 10:48:54,553 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-30 10:48:54,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:54,553 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-30 10:48:54,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 10:48:54,553 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-30 10:48:54,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-30 10:48:54,553 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:54,554 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-30 10:48:54,554 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:54,554 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:54,554 INFO L82 PathProgramCache]: Analyzing trace with hash 250828065, now seen corresponding path program 82 times [2018-09-30 10:48:54,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:54,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:54,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:54,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:54,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:55,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:55,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:55,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:48:55,107 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:48:55,152 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:48:55,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:55,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:56,496 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:56,496 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 10:48:56,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 10:48:56,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 10:48:56,497 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:56,497 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-09-30 10:48:57,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:57,291 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 10:48:57,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 10:48:57,291 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-09-30 10:48:57,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:57,292 INFO L225 Difference]: With dead ends: 89 [2018-09-30 10:48:57,292 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 10:48:57,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:57,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 10:48:57,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 10:48:57,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 10:48:57,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 10:48:57,294 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-30 10:48:57,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:57,294 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 10:48:57,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 10:48:57,294 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 10:48:57,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 10:48:57,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:57,295 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-30 10:48:57,295 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:57,295 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:57,295 INFO L82 PathProgramCache]: Analyzing trace with hash -814266552, now seen corresponding path program 83 times [2018-09-30 10:48:57,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:57,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:57,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:57,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:57,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:57,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:57,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:57,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:57,750 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 [2018-09-30 10:48:57,758 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:48:57,878 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-30 10:48:57,878 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:57,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:58,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:58,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 10:48:58,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 10:48:58,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 10:48:58,065 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:58,065 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-09-30 10:48:58,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:58,873 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-30 10:48:58,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 10:48:58,873 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-09-30 10:48:58,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:58,874 INFO L225 Difference]: With dead ends: 90 [2018-09-30 10:48:58,874 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 10:48:58,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:58,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 10:48:58,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 10:48:58,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 10:48:58,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-30 10:48:58,876 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-30 10:48:58,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:58,876 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-30 10:48:58,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 10:48:58,876 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-30 10:48:58,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 10:48:58,876 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:58,876 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-30 10:48:58,877 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:58,877 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:58,877 INFO L82 PathProgramCache]: Analyzing trace with hash 527538689, now seen corresponding path program 84 times [2018-09-30 10:48:58,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:58,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:58,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:58,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:58,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:59,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:59,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:59,357 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 [2018-09-30 10:48:59,365 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:48:59,437 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 10:48:59,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:59,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:59,621 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:59,621 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-30 10:48:59,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 10:48:59,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 10:48:59,622 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:59,622 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-09-30 10:49:00,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:00,240 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 10:49:00,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 10:49:00,240 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-09-30 10:49:00,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:00,241 INFO L225 Difference]: With dead ends: 91 [2018-09-30 10:49:00,241 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 10:49:00,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:00,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 10:49:00,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 10:49:00,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 10:49:00,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-30 10:49:00,244 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-30 10:49:00,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:00,244 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-30 10:49:00,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 10:49:00,244 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-30 10:49:00,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 10:49:00,245 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:00,245 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-30 10:49:00,245 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:00,245 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:00,246 INFO L82 PathProgramCache]: Analyzing trace with hash -826171800, now seen corresponding path program 85 times [2018-09-30 10:49:00,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:00,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:00,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:00,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:00,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:00,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:00,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:49:00,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:00,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:01,252 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:01,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 10:49:01,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 10:49:01,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 10:49:01,253 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:01,253 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-09-30 10:49:01,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:01,834 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-30 10:49:01,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 10:49:01,834 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-09-30 10:49:01,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:01,835 INFO L225 Difference]: With dead ends: 92 [2018-09-30 10:49:01,835 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 10:49:01,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:01,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 10:49:01,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-30 10:49:01,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 10:49:01,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-30 10:49:01,838 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-30 10:49:01,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:01,839 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-30 10:49:01,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 10:49:01,839 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-30 10:49:01,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 10:49:01,839 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:01,839 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-30 10:49:01,840 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:01,840 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:01,840 INFO L82 PathProgramCache]: Analyzing trace with hash 158476001, now seen corresponding path program 86 times [2018-09-30 10:49:01,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:01,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:01,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:01,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:01,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:02,321 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:02,321 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 [2018-09-30 10:49:02,330 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:49:02,378 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:49:02,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:02,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:02,568 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:02,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 10:49:02,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 10:49:02,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 10:49:02,570 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:02,570 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-09-30 10:49:03,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:03,138 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 10:49:03,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 10:49:03,138 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-09-30 10:49:03,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:03,139 INFO L225 Difference]: With dead ends: 93 [2018-09-30 10:49:03,139 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 10:49:03,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:03,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 10:49:03,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 10:49:03,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 10:49:03,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 10:49:03,141 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-30 10:49:03,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:03,141 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 10:49:03,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 10:49:03,142 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 10:49:03,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 10:49:03,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:03,143 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-30 10:49:03,143 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:03,143 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:03,143 INFO L82 PathProgramCache]: Analyzing trace with hash 617786760, now seen corresponding path program 87 times [2018-09-30 10:49:03,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:03,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:03,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:03,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:03,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:03,735 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:03,735 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 [2018-09-30 10:49:03,744 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:49:03,819 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-30 10:49:03,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:03,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:04,014 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:04,014 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 10:49:04,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 10:49:04,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 10:49:04,016 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:04,016 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-09-30 10:49:04,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:04,599 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-30 10:49:04,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 10:49:04,599 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-09-30 10:49:04,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:04,600 INFO L225 Difference]: With dead ends: 94 [2018-09-30 10:49:04,600 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 10:49:04,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:04,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 10:49:04,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 10:49:04,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 10:49:04,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-30 10:49:04,602 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-30 10:49:04,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:04,602 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-30 10:49:04,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 10:49:04,602 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-30 10:49:04,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-30 10:49:04,602 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:04,603 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-30 10:49:04,603 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:04,603 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:04,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1971518401, now seen corresponding path program 88 times [2018-09-30 10:49:04,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:04,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:04,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:04,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:04,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:05,206 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:05,206 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 [2018-09-30 10:49:05,213 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:49:05,260 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:49:05,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:05,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:05,492 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:05,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-30 10:49:05,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 10:49:05,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 10:49:05,493 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:05,493 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-09-30 10:49:06,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:06,096 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 10:49:06,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 10:49:06,097 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-09-30 10:49:06,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:06,097 INFO L225 Difference]: With dead ends: 95 [2018-09-30 10:49:06,097 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 10:49:06,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:06,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 10:49:06,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 10:49:06,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 10:49:06,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-30 10:49:06,099 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-30 10:49:06,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:06,099 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-30 10:49:06,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 10:49:06,100 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-30 10:49:06,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 10:49:06,100 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:06,100 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-30 10:49:06,100 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:06,100 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:06,100 INFO L82 PathProgramCache]: Analyzing trace with hash 987526312, now seen corresponding path program 89 times [2018-09-30 10:49:06,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:06,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:06,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:06,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:06,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:06,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:06,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:06,787 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 [2018-09-30 10:49:06,794 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:49:06,875 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 10:49:06,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:06,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:07,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:07,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 10:49:07,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 10:49:07,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 10:49:07,073 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:07,073 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-09-30 10:49:07,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:07,695 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-30 10:49:07,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 10:49:07,695 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-09-30 10:49:07,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:07,696 INFO L225 Difference]: With dead ends: 96 [2018-09-30 10:49:07,696 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 10:49:07,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:07,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 10:49:07,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 10:49:07,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 10:49:07,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-30 10:49:07,699 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-30 10:49:07,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:07,699 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-30 10:49:07,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 10:49:07,699 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-30 10:49:07,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 10:49:07,700 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:07,700 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-30 10:49:07,700 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:07,700 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:07,700 INFO L82 PathProgramCache]: Analyzing trace with hash 548542625, now seen corresponding path program 90 times [2018-09-30 10:49:07,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:07,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:07,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:07,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:07,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:08,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:08,232 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 [2018-09-30 10:49:08,240 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:49:08,316 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-30 10:49:08,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:08,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:08,511 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:08,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-30 10:49:08,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 10:49:08,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 10:49:08,513 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:08,513 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-09-30 10:49:09,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:09,261 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 10:49:09,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 10:49:09,261 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-09-30 10:49:09,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:09,262 INFO L225 Difference]: With dead ends: 97 [2018-09-30 10:49:09,262 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 10:49:09,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:09,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 10:49:09,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 10:49:09,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 10:49:09,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 10:49:09,265 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-30 10:49:09,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:09,265 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 10:49:09,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 10:49:09,266 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 10:49:09,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 10:49:09,266 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:09,266 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-30 10:49:09,266 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:09,267 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:09,267 INFO L82 PathProgramCache]: Analyzing trace with hash -175049784, now seen corresponding path program 91 times [2018-09-30 10:49:09,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:09,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:09,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:09,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:09,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:09,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:09,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:49:09,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:10,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:10,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:10,208 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:10,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 10:49:10,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 10:49:10,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 10:49:10,209 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:10,209 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-09-30 10:49:11,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:11,144 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-30 10:49:11,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 10:49:11,144 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-09-30 10:49:11,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:11,145 INFO L225 Difference]: With dead ends: 98 [2018-09-30 10:49:11,145 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 10:49:11,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:11,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 10:49:11,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-30 10:49:11,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 10:49:11,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-30 10:49:11,147 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-30 10:49:11,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:11,147 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-30 10:49:11,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 10:49:11,147 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-30 10:49:11,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 10:49:11,148 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:11,148 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-30 10:49:11,148 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:11,148 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:11,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1131577983, now seen corresponding path program 92 times [2018-09-30 10:49:11,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:11,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:11,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:11,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:11,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:11,919 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:11,920 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 [2018-09-30 10:49:11,926 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:49:11,978 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:49:11,978 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:11,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:12,187 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:12,188 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 10:49:12,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 10:49:12,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 10:49:12,189 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:12,189 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-09-30 10:49:12,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:12,864 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 10:49:12,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 10:49:12,865 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-09-30 10:49:12,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:12,865 INFO L225 Difference]: With dead ends: 99 [2018-09-30 10:49:12,865 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 10:49:12,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:12,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 10:49:12,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 10:49:12,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 10:49:12,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-30 10:49:12,867 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-30 10:49:12,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:12,868 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-30 10:49:12,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 10:49:12,868 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-30 10:49:12,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 10:49:12,868 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:12,868 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-30 10:49:12,868 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:12,868 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:12,869 INFO L82 PathProgramCache]: Analyzing trace with hash -719181080, now seen corresponding path program 93 times [2018-09-30 10:49:12,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:12,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:12,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:12,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:12,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:12,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:13,547 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:13,548 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 [2018-09-30 10:49:13,554 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:49:13,645 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-30 10:49:13,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:13,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:14,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:14,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:14,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 10:49:14,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 10:49:14,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 10:49:14,026 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:14,026 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-09-30 10:49:14,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:14,884 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-30 10:49:14,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 10:49:14,885 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-09-30 10:49:14,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:14,885 INFO L225 Difference]: With dead ends: 100 [2018-09-30 10:49:14,885 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 10:49:14,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:14,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 10:49:14,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-30 10:49:14,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-30 10:49:14,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-30 10:49:14,887 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-30 10:49:14,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:14,887 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-30 10:49:14,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 10:49:14,888 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-30 10:49:14,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-30 10:49:14,888 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:14,888 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-30 10:49:14,888 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:14,888 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:14,888 INFO L82 PathProgramCache]: Analyzing trace with hash -819778975, now seen corresponding path program 94 times [2018-09-30 10:49:14,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:14,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:14,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:14,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:14,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:15,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:15,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:49:15,463 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:49:15,516 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:49:15,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:15,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:15,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:15,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:15,772 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-30 10:49:15,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 10:49:15,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 10:49:15,774 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:15,774 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-09-30 10:49:16,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:16,491 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 10:49:16,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 10:49:16,492 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-09-30 10:49:16,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:16,492 INFO L225 Difference]: With dead ends: 101 [2018-09-30 10:49:16,492 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 10:49:16,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:16,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 10:49:16,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 10:49:16,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 10:49:16,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 10:49:16,494 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-30 10:49:16,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:16,494 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 10:49:16,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 10:49:16,495 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 10:49:16,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 10:49:16,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:16,495 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-30 10:49:16,495 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:16,496 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:16,496 INFO L82 PathProgramCache]: Analyzing trace with hash 356653576, now seen corresponding path program 95 times [2018-09-30 10:49:16,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:16,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:16,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:16,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:16,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:17,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:17,131 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 [2018-09-30 10:49:17,139 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:49:17,240 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-30 10:49:17,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:17,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:17,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:17,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 10:49:17,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 10:49:17,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 10:49:17,444 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:17,444 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-09-30 10:49:18,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:18,432 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-30 10:49:18,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 10:49:18,432 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-09-30 10:49:18,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:18,433 INFO L225 Difference]: With dead ends: 102 [2018-09-30 10:49:18,433 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 10:49:18,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:18,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 10:49:18,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 10:49:18,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 10:49:18,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-30 10:49:18,436 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-30 10:49:18,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:18,436 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-30 10:49:18,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 10:49:18,436 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-30 10:49:18,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 10:49:18,437 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:18,437 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-30 10:49:18,437 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:18,437 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:18,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1828643007, now seen corresponding path program 96 times [2018-09-30 10:49:18,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:18,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:18,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:18,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:18,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:19,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:19,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:49:19,050 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:49:19,133 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 10:49:19,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:19,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:19,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:19,352 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:19,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-30 10:49:19,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 10:49:19,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 10:49:19,353 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:19,353 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-09-30 10:49:20,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:20,094 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 10:49:20,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 10:49:20,095 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-09-30 10:49:20,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:20,095 INFO L225 Difference]: With dead ends: 103 [2018-09-30 10:49:20,095 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 10:49:20,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:20,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 10:49:20,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 10:49:20,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 10:49:20,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-30 10:49:20,097 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-30 10:49:20,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:20,098 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-30 10:49:20,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 10:49:20,098 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-30 10:49:20,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 10:49:20,098 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:20,098 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-30 10:49:20,098 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:20,098 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:20,099 INFO L82 PathProgramCache]: Analyzing trace with hash -853360344, now seen corresponding path program 97 times [2018-09-30 10:49:20,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:20,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:20,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:20,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:20,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:20,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:20,689 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 [2018-09-30 10:49:20,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:20,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:20,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:20,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 10:49:20,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 10:49:20,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 10:49:20,954 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:20,954 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-09-30 10:49:21,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:21,681 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-30 10:49:21,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 10:49:21,681 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-09-30 10:49:21,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:21,682 INFO L225 Difference]: With dead ends: 104 [2018-09-30 10:49:21,682 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 10:49:21,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:21,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 10:49:21,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-30 10:49:21,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-30 10:49:21,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-30 10:49:21,684 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-30 10:49:21,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:21,685 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-30 10:49:21,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 10:49:21,685 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-30 10:49:21,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 10:49:21,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:21,686 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-30 10:49:21,686 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:21,686 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:21,686 INFO L82 PathProgramCache]: Analyzing trace with hash -684368863, now seen corresponding path program 98 times [2018-09-30 10:49:21,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:21,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:21,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:21,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:21,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:22,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:22,337 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 [2018-09-30 10:49:22,345 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:49:22,400 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:49:22,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:22,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:22,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:22,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:22,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-30 10:49:22,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 10:49:22,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 10:49:22,620 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:22,620 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-09-30 10:49:23,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:23,701 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 10:49:23,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 10:49:23,702 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-09-30 10:49:23,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:23,702 INFO L225 Difference]: With dead ends: 105 [2018-09-30 10:49:23,702 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 10:49:23,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:23,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 10:49:23,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 10:49:23,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 10:49:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 10:49:23,705 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-30 10:49:23,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:23,705 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 10:49:23,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 10:49:23,705 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 10:49:23,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 10:49:23,706 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:23,706 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-30 10:49:23,706 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:23,706 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:23,706 INFO L82 PathProgramCache]: Analyzing trace with hash 259399752, now seen corresponding path program 99 times [2018-09-30 10:49:23,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:23,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:23,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:23,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:23,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:24,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:24,303 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 [2018-09-30 10:49:24,310 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:49:24,397 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-30 10:49:24,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:24,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:24,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:24,609 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 10:49:24,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 10:49:24,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 10:49:24,610 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:24,610 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-09-30 10:49:25,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:25,733 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-30 10:49:25,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 10:49:25,733 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-09-30 10:49:25,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:25,734 INFO L225 Difference]: With dead ends: 106 [2018-09-30 10:49:25,734 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 10:49:25,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:25,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 10:49:25,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 10:49:25,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 10:49:25,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-30 10:49:25,736 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-30 10:49:25,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:25,737 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-30 10:49:25,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 10:49:25,737 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-30 10:49:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-30 10:49:25,737 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:25,737 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-30 10:49:25,738 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:25,738 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:25,738 INFO L82 PathProgramCache]: Analyzing trace with hash -548544255, now seen corresponding path program 100 times [2018-09-30 10:49:25,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:25,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:25,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:25,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:25,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:26,371 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:26,372 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 [2018-09-30 10:49:26,379 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:49:26,436 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:49:26,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:26,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:26,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:26,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:26,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-30 10:49:26,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 10:49:26,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 10:49:26,742 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:26,742 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-09-30 10:49:27,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:27,933 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 10:49:27,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 10:49:27,934 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-09-30 10:49:27,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:27,934 INFO L225 Difference]: With dead ends: 107 [2018-09-30 10:49:27,935 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 10:49:27,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:27,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 10:49:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 10:49:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 10:49:27,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-30 10:49:27,937 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-30 10:49:27,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:27,938 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-30 10:49:27,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 10:49:27,938 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-30 10:49:27,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 10:49:27,939 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:27,939 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-30 10:49:27,939 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:27,939 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:27,939 INFO L82 PathProgramCache]: Analyzing trace with hash 174995304, now seen corresponding path program 101 times [2018-09-30 10:49:27,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:27,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:27,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:27,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:27,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:28,614 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:28,614 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 [2018-09-30 10:49:28,620 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:49:28,756 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-30 10:49:28,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:28,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:28,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:28,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-30 10:49:28,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 10:49:28,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 10:49:28,975 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:28,975 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-09-30 10:49:30,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:30,163 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-30 10:49:30,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 10:49:30,163 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-09-30 10:49:30,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:30,164 INFO L225 Difference]: With dead ends: 108 [2018-09-30 10:49:30,164 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 10:49:30,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:30,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 10:49:30,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 10:49:30,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 10:49:30,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-30 10:49:30,173 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-30 10:49:30,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:30,173 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-30 10:49:30,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 10:49:30,173 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-30 10:49:30,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-30 10:49:30,174 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:30,174 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-30 10:49:30,174 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:30,174 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:30,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1129885153, now seen corresponding path program 102 times [2018-09-30 10:49:30,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:30,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:30,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:30,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:30,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:30,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:30,991 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 [2018-09-30 10:49:30,998 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:49:31,093 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-30 10:49:31,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:31,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:31,325 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:31,325 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-30 10:49:31,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-30 10:49:31,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-30 10:49:31,327 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:31,327 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-09-30 10:49:32,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:32,455 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 10:49:32,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 10:49:32,455 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-09-30 10:49:32,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:32,456 INFO L225 Difference]: With dead ends: 109 [2018-09-30 10:49:32,456 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 10:49:32,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:32,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 10:49:32,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 10:49:32,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 10:49:32,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-30 10:49:32,458 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-30 10:49:32,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:32,459 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-30 10:49:32,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-30 10:49:32,459 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-30 10:49:32,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 10:49:32,459 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:32,459 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-30 10:49:32,460 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:32,460 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:32,460 INFO L82 PathProgramCache]: Analyzing trace with hash 666699400, now seen corresponding path program 103 times [2018-09-30 10:49:32,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:32,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:32,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:32,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:32,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:33,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:33,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:33,171 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 [2018-09-30 10:49:33,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:33,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:33,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:33,473 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:33,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-30 10:49:33,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 10:49:33,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 10:49:33,475 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:33,475 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-09-30 10:49:34,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:34,363 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-30 10:49:34,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 10:49:34,364 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-09-30 10:49:34,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:34,364 INFO L225 Difference]: With dead ends: 110 [2018-09-30 10:49:34,364 INFO L226 Difference]: Without dead ends: 108 [2018-09-30 10:49:34,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:34,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-30 10:49:34,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-30 10:49:34,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 10:49:34,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-30 10:49:34,366 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-30 10:49:34,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:34,367 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-30 10:49:34,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 10:49:34,367 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-30 10:49:34,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 10:49:34,367 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:34,367 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-30 10:49:34,367 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:34,368 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:34,368 INFO L82 PathProgramCache]: Analyzing trace with hash -807157055, now seen corresponding path program 104 times [2018-09-30 10:49:34,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:34,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:34,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:34,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:34,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:35,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:35,046 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 [2018-09-30 10:49:35,053 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:49:35,111 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:49:35,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:35,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:35,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:35,448 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-30 10:49:35,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 10:49:35,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 10:49:35,449 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:35,449 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-09-30 10:49:36,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:36,357 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 10:49:36,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 10:49:36,357 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-09-30 10:49:36,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:36,358 INFO L225 Difference]: With dead ends: 111 [2018-09-30 10:49:36,358 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 10:49:36,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:36,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 10:49:36,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 10:49:36,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 10:49:36,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-30 10:49:36,360 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-30 10:49:36,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:36,361 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-30 10:49:36,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 10:49:36,361 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-30 10:49:36,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 10:49:36,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:36,361 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-30 10:49:36,362 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:36,362 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:36,362 INFO L82 PathProgramCache]: Analyzing trace with hash 747933096, now seen corresponding path program 105 times [2018-09-30 10:49:36,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:36,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:36,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:36,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:36,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:37,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:37,198 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 [2018-09-30 10:49:37,208 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:49:37,322 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-30 10:49:37,323 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:37,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:37,543 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:37,544 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-30 10:49:37,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 10:49:37,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 10:49:37,545 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:37,545 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-09-30 10:49:38,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:38,801 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-30 10:49:38,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 10:49:38,801 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-09-30 10:49:38,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:38,801 INFO L225 Difference]: With dead ends: 112 [2018-09-30 10:49:38,801 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 10:49:38,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:38,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 10:49:38,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-30 10:49:38,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 10:49:38,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-30 10:49:38,804 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-30 10:49:38,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:38,805 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-30 10:49:38,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 10:49:38,805 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-30 10:49:38,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-30 10:49:38,805 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:38,805 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-30 10:49:38,806 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:38,806 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:38,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1711087521, now seen corresponding path program 106 times [2018-09-30 10:49:38,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:38,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:38,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:38,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:38,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:39,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:39,481 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 [2018-09-30 10:49:39,489 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:49:39,544 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:49:39,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:39,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:39,776 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:39,776 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-30 10:49:39,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-30 10:49:39,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-30 10:49:39,777 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:39,778 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-09-30 10:49:40,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:40,985 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 10:49:40,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 10:49:40,986 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-09-30 10:49:40,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:40,986 INFO L225 Difference]: With dead ends: 113 [2018-09-30 10:49:40,986 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 10:49:40,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:40,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 10:49:40,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 10:49:40,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 10:49:40,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-30 10:49:40,989 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-30 10:49:40,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:40,989 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-30 10:49:40,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-30 10:49:40,989 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-30 10:49:40,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 10:49:40,990 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:40,990 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-30 10:49:40,990 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:40,990 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:40,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1504103624, now seen corresponding path program 107 times [2018-09-30 10:49:40,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:40,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:40,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:40,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:40,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:41,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:41,690 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 [2018-09-30 10:49:41,697 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:49:41,803 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-30 10:49:41,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:41,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:42,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:42,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-30 10:49:42,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 10:49:42,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 10:49:42,137 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:42,137 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-09-30 10:49:43,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:43,470 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-09-30 10:49:43,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 10:49:43,471 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-09-30 10:49:43,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:43,471 INFO L225 Difference]: With dead ends: 114 [2018-09-30 10:49:43,471 INFO L226 Difference]: Without dead ends: 112 [2018-09-30 10:49:43,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:43,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-30 10:49:43,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-30 10:49:43,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 10:49:43,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-30 10:49:43,473 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-09-30 10:49:43,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:43,473 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-30 10:49:43,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 10:49:43,474 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-30 10:49:43,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 10:49:43,474 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:43,474 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-09-30 10:49:43,474 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:43,474 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:43,475 INFO L82 PathProgramCache]: Analyzing trace with hash -617429887, now seen corresponding path program 108 times [2018-09-30 10:49:43,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:43,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:43,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:43,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:43,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:44,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:44,169 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 [2018-09-30 10:49:44,176 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:49:44,274 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 10:49:44,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:44,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:44,504 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:44,505 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-30 10:49:44,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-30 10:49:44,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-30 10:49:44,507 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:44,507 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-09-30 10:49:45,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:45,524 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 10:49:45,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-30 10:49:45,524 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-09-30 10:49:45,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:45,525 INFO L225 Difference]: With dead ends: 115 [2018-09-30 10:49:45,525 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 10:49:45,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:45,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 10:49:45,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 10:49:45,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 10:49:45,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-30 10:49:45,527 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-09-30 10:49:45,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:45,527 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-30 10:49:45,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-30 10:49:45,527 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-30 10:49:45,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 10:49:45,528 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:45,528 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-09-30 10:49:45,528 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:45,528 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:45,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1960459288, now seen corresponding path program 109 times [2018-09-30 10:49:45,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:45,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:45,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:45,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:45,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:46,250 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:46,250 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 [2018-09-30 10:49:46,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:46,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:46,553 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:46,553 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-30 10:49:46,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 10:49:46,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 10:49:46,555 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:46,555 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-09-30 10:49:47,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:47,837 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-09-30 10:49:47,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-30 10:49:47,837 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-09-30 10:49:47,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:47,837 INFO L225 Difference]: With dead ends: 116 [2018-09-30 10:49:47,837 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 10:49:47,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:47,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 10:49:47,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-30 10:49:47,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-30 10:49:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-30 10:49:47,840 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-09-30 10:49:47,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:47,840 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-30 10:49:47,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 10:49:47,841 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-30 10:49:47,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 10:49:47,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:47,841 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-09-30 10:49:47,841 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:47,842 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:47,842 INFO L82 PathProgramCache]: Analyzing trace with hash -644697759, now seen corresponding path program 110 times [2018-09-30 10:49:47,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:47,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:47,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:47,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:47,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:48,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:48,598 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 [2018-09-30 10:49:48,607 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:49:48,667 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:49:48,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:48,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:48,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:48,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-30 10:49:48,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 10:49:48,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 10:49:48,898 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:48,898 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-09-30 10:49:50,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:50,198 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 10:49:50,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 10:49:50,198 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-09-30 10:49:50,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:50,199 INFO L225 Difference]: With dead ends: 117 [2018-09-30 10:49:50,199 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 10:49:50,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:50,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 10:49:50,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 10:49:50,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 10:49:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-30 10:49:50,202 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-09-30 10:49:50,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:50,202 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-30 10:49:50,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 10:49:50,202 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-30 10:49:50,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 10:49:50,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:50,203 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-09-30 10:49:50,203 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:50,203 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:50,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1489203976, now seen corresponding path program 111 times [2018-09-30 10:49:50,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:50,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:50,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:50,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:50,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:50,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:50,979 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 [2018-09-30 10:49:50,987 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:49:51,135 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-09-30 10:49:51,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:51,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:51,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:51,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-30 10:49:51,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 10:49:51,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 10:49:51,379 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:51,379 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 114 states. [2018-09-30 10:49:52,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:52,767 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-09-30 10:49:52,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-30 10:49:52,767 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-09-30 10:49:52,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:52,767 INFO L225 Difference]: With dead ends: 118 [2018-09-30 10:49:52,768 INFO L226 Difference]: Without dead ends: 116 [2018-09-30 10:49:52,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:52,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-30 10:49:52,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-30 10:49:52,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-30 10:49:52,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-30 10:49:52,770 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-09-30 10:49:52,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:52,770 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-30 10:49:52,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 10:49:52,770 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-30 10:49:52,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-30 10:49:52,770 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:52,771 INFO L375 BasicCegarLoop]: trace histogram [112, 1, 1, 1] [2018-09-30 10:49:52,771 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:52,771 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:52,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1079318975, now seen corresponding path program 112 times [2018-09-30 10:49:52,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:52,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:52,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:52,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:52,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:53,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:53,496 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 [2018-09-30 10:49:53,503 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:49:53,562 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:49:53,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:53,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:53,860 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:53,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-09-30 10:49:53,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-09-30 10:49:53,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-09-30 10:49:53,862 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:53,862 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 115 states. [2018-09-30 10:49:55,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:55,182 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-30 10:49:55,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-30 10:49:55,183 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 115 [2018-09-30 10:49:55,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:55,183 INFO L225 Difference]: With dead ends: 119 [2018-09-30 10:49:55,183 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 10:49:55,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:55,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 10:49:55,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 10:49:55,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 10:49:55,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-30 10:49:55,185 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2018-09-30 10:49:55,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:55,186 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-30 10:49:55,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-09-30 10:49:55,186 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-30 10:49:55,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 10:49:55,186 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:55,186 INFO L375 BasicCegarLoop]: trace histogram [113, 1, 1, 1] [2018-09-30 10:49:55,186 INFO L423 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:55,186 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:55,187 INFO L82 PathProgramCache]: Analyzing trace with hash 900848168, now seen corresponding path program 113 times [2018-09-30 10:49:55,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:55,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:55,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:55,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:55,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:56,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:56,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:49:56,026 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:49:56,142 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-09-30 10:49:56,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:56,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:56,536 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:56,536 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 115 [2018-09-30 10:49:56,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 10:49:56,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 10:49:56,538 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:56,538 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 116 states. [2018-09-30 10:49:57,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:57,695 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-09-30 10:49:57,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-30 10:49:57,695 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 116 [2018-09-30 10:49:57,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:57,696 INFO L225 Difference]: With dead ends: 120 [2018-09-30 10:49:57,696 INFO L226 Difference]: Without dead ends: 118 [2018-09-30 10:49:57,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:57,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-30 10:49:57,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-30 10:49:57,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-30 10:49:57,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-30 10:49:57,698 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2018-09-30 10:49:57,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:57,698 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-30 10:49:57,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 10:49:57,698 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-30 10:49:57,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-30 10:49:57,699 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:57,699 INFO L375 BasicCegarLoop]: trace histogram [114, 1, 1, 1] [2018-09-30 10:49:57,699 INFO L423 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:57,699 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:57,699 INFO L82 PathProgramCache]: Analyzing trace with hash -2138479839, now seen corresponding path program 114 times [2018-09-30 10:49:57,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:57,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:57,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:57,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:57,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:57,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:58,436 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:58,436 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:49:58,443 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:49:58,549 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2018-09-30 10:49:58,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:58,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:58,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:58,800 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:58,801 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 116 [2018-09-30 10:49:58,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-09-30 10:49:58,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-09-30 10:49:58,802 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:58,802 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 117 states. [2018-09-30 10:50:00,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:00,071 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 10:50:00,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-30 10:50:00,071 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 117 [2018-09-30 10:50:00,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:00,072 INFO L225 Difference]: With dead ends: 121 [2018-09-30 10:50:00,072 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 10:50:00,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:00,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 10:50:00,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 10:50:00,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 10:50:00,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-30 10:50:00,075 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2018-09-30 10:50:00,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:00,076 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-30 10:50:00,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-09-30 10:50:00,076 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-30 10:50:00,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 10:50:00,076 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:00,076 INFO L375 BasicCegarLoop]: trace histogram [115, 1, 1, 1] [2018-09-30 10:50:00,076 INFO L423 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:00,077 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:00,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1868367544, now seen corresponding path program 115 times [2018-09-30 10:50:00,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:00,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:00,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:00,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:00,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:00,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:00,854 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:00,854 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 [2018-09-30 10:50:00,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:00,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:00,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:01,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:01,167 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:01,168 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 117 [2018-09-30 10:50:01,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 10:50:01,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 10:50:01,170 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:01,170 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 118 states. [2018-09-30 10:50:02,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:02,511 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-09-30 10:50:02,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-30 10:50:02,511 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 118 [2018-09-30 10:50:02,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:02,511 INFO L225 Difference]: With dead ends: 122 [2018-09-30 10:50:02,511 INFO L226 Difference]: Without dead ends: 120 [2018-09-30 10:50:02,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:02,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-30 10:50:02,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-30 10:50:02,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-30 10:50:02,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-30 10:50:02,514 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2018-09-30 10:50:02,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:02,514 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-30 10:50:02,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 10:50:02,514 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-30 10:50:02,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-30 10:50:02,514 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:02,514 INFO L375 BasicCegarLoop]: trace histogram [116, 1, 1, 1] [2018-09-30 10:50:02,514 INFO L423 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:02,515 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:02,515 INFO L82 PathProgramCache]: Analyzing trace with hash -2084820991, now seen corresponding path program 116 times [2018-09-30 10:50:02,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:02,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:02,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:02,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:02,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:03,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:03,386 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:03,386 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 [2018-09-30 10:50:03,394 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:50:03,455 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:50:03,455 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:03,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:03,704 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:03,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 118 [2018-09-30 10:50:03,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-30 10:50:03,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-30 10:50:03,706 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:03,706 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 119 states. [2018-09-30 10:50:04,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:04,837 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-30 10:50:04,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-30 10:50:04,837 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 119 [2018-09-30 10:50:04,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:04,837 INFO L225 Difference]: With dead ends: 123 [2018-09-30 10:50:04,837 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 10:50:04,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:04,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 10:50:04,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 10:50:04,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 10:50:04,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-30 10:50:04,840 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2018-09-30 10:50:04,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:04,840 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-30 10:50:04,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-30 10:50:04,840 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-30 10:50:04,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-30 10:50:04,840 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:04,840 INFO L375 BasicCegarLoop]: trace histogram [117, 1, 1, 1] [2018-09-30 10:50:04,841 INFO L423 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:04,841 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:04,841 INFO L82 PathProgramCache]: Analyzing trace with hash -204943256, now seen corresponding path program 117 times [2018-09-30 10:50:04,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:04,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:04,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:04,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:04,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:05,639 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:05,639 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 [2018-09-30 10:50:05,645 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:50:05,760 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-09-30 10:50:05,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:05,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:06,003 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:06,004 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 119 [2018-09-30 10:50:06,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 10:50:06,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 10:50:06,006 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:06,006 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 120 states. [2018-09-30 10:50:07,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:07,288 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-09-30 10:50:07,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-30 10:50:07,288 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 120 [2018-09-30 10:50:07,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:07,289 INFO L225 Difference]: With dead ends: 124 [2018-09-30 10:50:07,289 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 10:50:07,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:07,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 10:50:07,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-30 10:50:07,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-30 10:50:07,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-30 10:50:07,291 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 120 [2018-09-30 10:50:07,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:07,291 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-30 10:50:07,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 10:50:07,291 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-30 10:50:07,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-30 10:50:07,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:07,292 INFO L375 BasicCegarLoop]: trace histogram [118, 1, 1, 1] [2018-09-30 10:50:07,292 INFO L423 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:07,292 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:07,292 INFO L82 PathProgramCache]: Analyzing trace with hash -2058275615, now seen corresponding path program 118 times [2018-09-30 10:50:07,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:07,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:07,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:07,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:07,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:07,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:08,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:08,306 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:08,306 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 [2018-09-30 10:50:08,314 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:50:08,379 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:50:08,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:08,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:08,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:08,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:08,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 120 [2018-09-30 10:50:08,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-09-30 10:50:08,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-09-30 10:50:08,635 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:08,635 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 121 states. [2018-09-30 10:50:10,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:10,082 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 10:50:10,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 10:50:10,082 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 121 [2018-09-30 10:50:10,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:10,083 INFO L225 Difference]: With dead ends: 125 [2018-09-30 10:50:10,083 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 10:50:10,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:10,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 10:50:10,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 10:50:10,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 10:50:10,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-30 10:50:10,086 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 121 [2018-09-30 10:50:10,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:10,086 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-30 10:50:10,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-09-30 10:50:10,086 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-30 10:50:10,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 10:50:10,087 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:10,087 INFO L375 BasicCegarLoop]: trace histogram [119, 1, 1, 1] [2018-09-30 10:50:10,087 INFO L423 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:10,087 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:10,087 INFO L82 PathProgramCache]: Analyzing trace with hash 617963400, now seen corresponding path program 119 times [2018-09-30 10:50:10,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:10,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:10,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:10,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:10,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:10,922 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:10,923 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 [2018-09-30 10:50:10,929 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:50:11,063 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-30 10:50:11,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:11,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:11,313 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:11,313 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 121 [2018-09-30 10:50:11,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 10:50:11,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 10:50:11,315 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:11,315 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 122 states. [2018-09-30 10:50:12,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:12,467 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-09-30 10:50:12,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-30 10:50:12,467 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 122 [2018-09-30 10:50:12,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:12,468 INFO L225 Difference]: With dead ends: 126 [2018-09-30 10:50:12,468 INFO L226 Difference]: Without dead ends: 124 [2018-09-30 10:50:12,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:12,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-30 10:50:12,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-30 10:50:12,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-30 10:50:12,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-30 10:50:12,470 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 122 [2018-09-30 10:50:12,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:12,471 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-30 10:50:12,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 10:50:12,471 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-30 10:50:12,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-30 10:50:12,471 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:12,472 INFO L375 BasicCegarLoop]: trace histogram [120, 1, 1, 1] [2018-09-30 10:50:12,472 INFO L423 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:12,472 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:12,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1976994241, now seen corresponding path program 120 times [2018-09-30 10:50:12,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:12,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:12,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:12,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:12,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:13,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:13,575 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 [2018-09-30 10:50:13,583 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:50:13,702 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 10:50:13,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:13,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:13,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:13,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 122 [2018-09-30 10:50:13,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-09-30 10:50:13,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-09-30 10:50:13,957 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:13,957 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 123 states. [2018-09-30 10:50:15,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:15,470 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-30 10:50:15,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-09-30 10:50:15,470 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 123 [2018-09-30 10:50:15,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:15,470 INFO L225 Difference]: With dead ends: 127 [2018-09-30 10:50:15,470 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 10:50:15,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:15,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 10:50:15,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-30 10:50:15,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 10:50:15,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-30 10:50:15,473 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 123 [2018-09-30 10:50:15,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:15,473 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-30 10:50:15,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-09-30 10:50:15,473 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-30 10:50:15,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-30 10:50:15,473 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:15,473 INFO L375 BasicCegarLoop]: trace histogram [121, 1, 1, 1] [2018-09-30 10:50:15,473 INFO L423 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:15,474 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:15,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1157277352, now seen corresponding path program 121 times [2018-09-30 10:50:15,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:15,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:15,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:15,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:15,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:16,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:16,330 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 [2018-09-30 10:50:16,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:16,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:16,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:16,734 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:16,734 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 123 [2018-09-30 10:50:16,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 10:50:16,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 10:50:16,736 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:16,737 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 124 states. [2018-09-30 10:50:18,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:18,203 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-09-30 10:50:18,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-09-30 10:50:18,203 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 124 [2018-09-30 10:50:18,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:18,203 INFO L225 Difference]: With dead ends: 128 [2018-09-30 10:50:18,203 INFO L226 Difference]: Without dead ends: 126 [2018-09-30 10:50:18,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:18,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-30 10:50:18,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-30 10:50:18,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-30 10:50:18,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-30 10:50:18,206 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 124 [2018-09-30 10:50:18,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:18,206 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-30 10:50:18,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 10:50:18,206 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-30 10:50:18,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-30 10:50:18,206 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:18,206 INFO L375 BasicCegarLoop]: trace histogram [122, 1, 1, 1] [2018-09-30 10:50:18,206 INFO L423 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:18,207 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:18,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1515857569, now seen corresponding path program 122 times [2018-09-30 10:50:18,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:18,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:18,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:18,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:18,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:19,053 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:19,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:50:19,060 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:50:19,124 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:50:19,125 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:19,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:19,387 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:19,388 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 124 [2018-09-30 10:50:19,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-30 10:50:19,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-30 10:50:19,390 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:19,390 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 125 states. [2018-09-30 10:50:20,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:20,860 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 10:50:20,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-30 10:50:20,860 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 125 [2018-09-30 10:50:20,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:20,860 INFO L225 Difference]: With dead ends: 129 [2018-09-30 10:50:20,860 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 10:50:20,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:20,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 10:50:20,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-30 10:50:20,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 10:50:20,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-30 10:50:20,863 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 125 [2018-09-30 10:50:20,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:20,863 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-30 10:50:20,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-30 10:50:20,863 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-30 10:50:20,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-30 10:50:20,864 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:20,864 INFO L375 BasicCegarLoop]: trace histogram [123, 1, 1, 1] [2018-09-30 10:50:20,864 INFO L423 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:20,864 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:20,864 INFO L82 PathProgramCache]: Analyzing trace with hash -253057592, now seen corresponding path program 123 times [2018-09-30 10:50:20,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:20,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:20,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:20,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:20,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:21,741 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:21,741 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 [2018-09-30 10:50:21,748 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:50:21,872 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-09-30 10:50:21,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:21,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:22,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:22,129 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:22,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 125 [2018-09-30 10:50:22,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 10:50:22,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 10:50:22,131 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:22,131 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 126 states. [2018-09-30 10:50:23,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:23,613 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-09-30 10:50:23,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-09-30 10:50:23,614 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 126 [2018-09-30 10:50:23,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:23,614 INFO L225 Difference]: With dead ends: 130 [2018-09-30 10:50:23,614 INFO L226 Difference]: Without dead ends: 128 [2018-09-30 10:50:23,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:23,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-30 10:50:23,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-30 10:50:23,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-30 10:50:23,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-30 10:50:23,616 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 126 [2018-09-30 10:50:23,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:23,617 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-30 10:50:23,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 10:50:23,617 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-30 10:50:23,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-30 10:50:23,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:23,618 INFO L375 BasicCegarLoop]: trace histogram [124, 1, 1, 1] [2018-09-30 10:50:23,618 INFO L423 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:23,618 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:23,618 INFO L82 PathProgramCache]: Analyzing trace with hash 745147265, now seen corresponding path program 124 times [2018-09-30 10:50:23,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:23,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:23,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:23,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:23,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:24,518 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:24,518 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 [2018-09-30 10:50:24,525 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:50:24,591 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:50:24,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:24,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:24,852 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:24,853 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 126 [2018-09-30 10:50:24,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-09-30 10:50:24,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-09-30 10:50:24,855 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:24,855 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 127 states. [2018-09-30 10:50:26,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:26,374 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-30 10:50:26,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-30 10:50:26,374 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 127 [2018-09-30 10:50:26,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:26,375 INFO L225 Difference]: With dead ends: 131 [2018-09-30 10:50:26,375 INFO L226 Difference]: Without dead ends: 129 [2018-09-30 10:50:26,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:26,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-30 10:50:26,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-30 10:50:26,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 10:50:26,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-30 10:50:26,377 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 127 [2018-09-30 10:50:26,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:26,377 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-30 10:50:26,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-09-30 10:50:26,377 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-30 10:50:26,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 10:50:26,378 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:26,378 INFO L375 BasicCegarLoop]: trace histogram [125, 1, 1, 1] [2018-09-30 10:50:26,378 INFO L423 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:26,378 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:26,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1624726760, now seen corresponding path program 125 times [2018-09-30 10:50:26,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:26,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:26,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:26,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:26,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:27,297 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:27,297 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 [2018-09-30 10:50:27,308 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:50:27,445 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-09-30 10:50:27,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:27,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:27,708 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:27,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 127 [2018-09-30 10:50:27,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 10:50:27,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 10:50:27,710 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:27,711 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 128 states. [2018-09-30 10:50:29,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:29,183 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-09-30 10:50:29,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-30 10:50:29,184 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 128 [2018-09-30 10:50:29,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:29,184 INFO L225 Difference]: With dead ends: 132 [2018-09-30 10:50:29,184 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 10:50:29,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:29,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 10:50:29,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-30 10:50:29,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-30 10:50:29,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-30 10:50:29,186 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 128 [2018-09-30 10:50:29,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:29,187 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-30 10:50:29,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 10:50:29,187 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-30 10:50:29,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-30 10:50:29,187 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:29,187 INFO L375 BasicCegarLoop]: trace histogram [126, 1, 1, 1] [2018-09-30 10:50:29,187 INFO L423 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:29,188 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:29,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1173079967, now seen corresponding path program 126 times [2018-09-30 10:50:29,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:29,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:29,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:29,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:29,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:30,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:30,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:30,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:50:30,098 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:50:30,220 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2018-09-30 10:50:30,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:30,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:30,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:30,487 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:30,487 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 128 [2018-09-30 10:50:30,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-09-30 10:50:30,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-09-30 10:50:30,489 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:30,489 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 129 states. [2018-09-30 10:50:31,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:31,958 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 10:50:31,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-30 10:50:31,959 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 129 [2018-09-30 10:50:31,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:31,959 INFO L225 Difference]: With dead ends: 133 [2018-09-30 10:50:31,959 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 10:50:31,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:31,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 10:50:31,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 10:50:31,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 10:50:31,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-30 10:50:31,962 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 129 [2018-09-30 10:50:31,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:31,962 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-30 10:50:31,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-09-30 10:50:31,962 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-30 10:50:31,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 10:50:31,963 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:31,963 INFO L375 BasicCegarLoop]: trace histogram [127, 1, 1, 1] [2018-09-30 10:50:31,963 INFO L423 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:31,963 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:31,963 INFO L82 PathProgramCache]: Analyzing trace with hash -2005742584, now seen corresponding path program 127 times [2018-09-30 10:50:31,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:31,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:31,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:31,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:31,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:31,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:32,886 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:32,887 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 [2018-09-30 10:50:32,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:32,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:32,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:33,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:33,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:33,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 129 [2018-09-30 10:50:33,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 10:50:33,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 10:50:33,322 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:33,322 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 130 states. [2018-09-30 10:50:35,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:35,019 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-09-30 10:50:35,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-09-30 10:50:35,020 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 130 [2018-09-30 10:50:35,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:35,020 INFO L225 Difference]: With dead ends: 134 [2018-09-30 10:50:35,020 INFO L226 Difference]: Without dead ends: 132 [2018-09-30 10:50:35,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:35,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-30 10:50:35,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-30 10:50:35,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-30 10:50:35,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-30 10:50:35,024 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 130 [2018-09-30 10:50:35,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:35,024 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-30 10:50:35,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 10:50:35,024 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-30 10:50:35,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-30 10:50:35,025 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:35,025 INFO L375 BasicCegarLoop]: trace histogram [128, 1, 1, 1] [2018-09-30 10:50:35,025 INFO L423 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:35,025 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:35,025 INFO L82 PathProgramCache]: Analyzing trace with hash -2048479935, now seen corresponding path program 128 times [2018-09-30 10:50:35,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:35,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:35,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:35,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:35,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:36,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:36,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:50:36,031 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:50:36,098 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:50:36,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:36,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:36,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:36,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:36,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 130 [2018-09-30 10:50:36,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-30 10:50:36,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-30 10:50:36,373 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:36,374 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 131 states. [2018-09-30 10:50:37,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:37,983 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-30 10:50:37,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-30 10:50:37,983 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 131 [2018-09-30 10:50:37,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:37,984 INFO L225 Difference]: With dead ends: 135 [2018-09-30 10:50:37,984 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 10:50:37,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:37,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 10:50:37,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 10:50:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 10:50:37,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-30 10:50:37,987 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 131 [2018-09-30 10:50:37,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:37,987 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-30 10:50:37,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-30 10:50:37,987 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-30 10:50:37,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 10:50:37,988 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:37,988 INFO L375 BasicCegarLoop]: trace histogram [129, 1, 1, 1] [2018-09-30 10:50:37,988 INFO L423 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:37,988 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:37,988 INFO L82 PathProgramCache]: Analyzing trace with hash 921629480, now seen corresponding path program 129 times [2018-09-30 10:50:37,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:37,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:37,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:37,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:37,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:39,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:39,219 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 [2018-09-30 10:50:39,226 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:50:39,378 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2018-09-30 10:50:39,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:39,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:39,647 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:39,647 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 131 [2018-09-30 10:50:39,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 10:50:39,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 10:50:39,649 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:39,649 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 132 states. [2018-09-30 10:50:41,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:41,364 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-09-30 10:50:41,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-09-30 10:50:41,364 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 132 [2018-09-30 10:50:41,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:41,365 INFO L225 Difference]: With dead ends: 136 [2018-09-30 10:50:41,365 INFO L226 Difference]: Without dead ends: 134 [2018-09-30 10:50:41,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:41,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-30 10:50:41,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-30 10:50:41,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-30 10:50:41,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-30 10:50:41,367 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 132 [2018-09-30 10:50:41,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:41,368 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-30 10:50:41,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 10:50:41,368 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-30 10:50:41,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-30 10:50:41,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:41,369 INFO L375 BasicCegarLoop]: trace histogram [130, 1, 1, 1] [2018-09-30 10:50:41,369 INFO L423 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:41,369 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:41,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1494259167, now seen corresponding path program 130 times [2018-09-30 10:50:41,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:41,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:41,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:41,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:41,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:42,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:42,370 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 [2018-09-30 10:50:42,377 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:50:42,449 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:50:42,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:42,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:42,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:42,733 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:42,734 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 132 [2018-09-30 10:50:42,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-09-30 10:50:42,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-09-30 10:50:42,735 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:42,735 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 133 states. [2018-09-30 10:50:44,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:44,301 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 10:50:44,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-09-30 10:50:44,301 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 133 [2018-09-30 10:50:44,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:44,302 INFO L225 Difference]: With dead ends: 137 [2018-09-30 10:50:44,302 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 10:50:44,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:44,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 10:50:44,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-30 10:50:44,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 10:50:44,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-30 10:50:44,304 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 133 [2018-09-30 10:50:44,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:44,304 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-30 10:50:44,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-09-30 10:50:44,305 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-30 10:50:44,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 10:50:44,305 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:44,305 INFO L375 BasicCegarLoop]: trace histogram [131, 1, 1, 1] [2018-09-30 10:50:44,305 INFO L423 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:44,305 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:44,305 INFO L82 PathProgramCache]: Analyzing trace with hash 922604104, now seen corresponding path program 131 times [2018-09-30 10:50:44,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:44,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:44,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:44,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:44,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:45,297 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:45,297 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 [2018-09-30 10:50:45,304 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:50:45,454 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-30 10:50:45,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:45,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:45,728 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:45,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 133 [2018-09-30 10:50:45,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 10:50:45,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 10:50:45,731 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:45,731 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 134 states. [2018-09-30 10:50:47,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:47,209 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-09-30 10:50:47,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-09-30 10:50:47,210 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 134 [2018-09-30 10:50:47,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:47,210 INFO L225 Difference]: With dead ends: 138 [2018-09-30 10:50:47,210 INFO L226 Difference]: Without dead ends: 136 [2018-09-30 10:50:47,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:47,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-30 10:50:47,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-30 10:50:47,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 10:50:47,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-30 10:50:47,212 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 134 [2018-09-30 10:50:47,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:47,213 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-30 10:50:47,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 10:50:47,213 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-30 10:50:47,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-30 10:50:47,213 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:47,213 INFO L375 BasicCegarLoop]: trace histogram [132, 1, 1, 1] [2018-09-30 10:50:47,213 INFO L423 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:47,213 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:47,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1464045823, now seen corresponding path program 132 times [2018-09-30 10:50:47,214 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:47,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:47,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:47,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:47,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:48,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:48,216 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 [2018-09-30 10:50:48,223 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:50:48,352 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 10:50:48,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:48,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:48,755 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:48,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 134 [2018-09-30 10:50:48,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-09-30 10:50:48,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-09-30 10:50:48,757 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:48,757 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 135 states. [2018-09-30 10:50:50,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:50,206 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-30 10:50:50,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-09-30 10:50:50,206 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 135 [2018-09-30 10:50:50,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:50,206 INFO L225 Difference]: With dead ends: 139 [2018-09-30 10:50:50,207 INFO L226 Difference]: Without dead ends: 137 [2018-09-30 10:50:50,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:50,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-30 10:50:50,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-30 10:50:50,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 10:50:50,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-30 10:50:50,209 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 135 [2018-09-30 10:50:50,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:50,209 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-30 10:50:50,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-09-30 10:50:50,209 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-30 10:50:50,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-30 10:50:50,209 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:50,209 INFO L375 BasicCegarLoop]: trace histogram [133, 1, 1, 1] [2018-09-30 10:50:50,210 INFO L423 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:50,210 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:50,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1859217768, now seen corresponding path program 133 times [2018-09-30 10:50:50,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:50,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:50,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:50,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:50,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:51,239 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:51,239 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 [2018-09-30 10:50:51,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:51,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:51,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:51,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135] total 135 [2018-09-30 10:50:51,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-30 10:50:51,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-30 10:50:51,604 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:51,604 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 136 states. [2018-09-30 10:50:53,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:53,487 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2018-09-30 10:50:53,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-09-30 10:50:53,488 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 136 [2018-09-30 10:50:53,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:53,488 INFO L225 Difference]: With dead ends: 140 [2018-09-30 10:50:53,488 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 10:50:53,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:53,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 10:50:53,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-30 10:50:53,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-30 10:50:53,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-30 10:50:53,490 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 136 [2018-09-30 10:50:53,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:53,491 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-30 10:50:53,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-30 10:50:53,491 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-30 10:50:53,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-30 10:50:53,491 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:53,491 INFO L375 BasicCegarLoop]: trace histogram [134, 1, 1, 1] [2018-09-30 10:50:53,491 INFO L423 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:53,491 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:53,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1801173985, now seen corresponding path program 134 times [2018-09-30 10:50:53,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:53,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:53,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:53,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:53,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:54,821 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:54,821 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 [2018-09-30 10:50:54,828 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:50:54,902 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:50:54,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:54,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:55,199 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:55,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136] total 136 [2018-09-30 10:50:55,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-30 10:50:55,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-30 10:50:55,201 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:55,201 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 137 states. [2018-09-30 10:50:57,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:57,028 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 10:50:57,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-30 10:50:57,029 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 137 [2018-09-30 10:50:57,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:57,029 INFO L225 Difference]: With dead ends: 141 [2018-09-30 10:50:57,029 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 10:50:57,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:57,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 10:50:57,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 10:50:57,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 10:50:57,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-30 10:50:57,031 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 137 [2018-09-30 10:50:57,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:57,031 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-30 10:50:57,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-30 10:50:57,032 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-30 10:50:57,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 10:50:57,032 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:57,032 INFO L375 BasicCegarLoop]: trace histogram [135, 1, 1, 1] [2018-09-30 10:50:57,032 INFO L423 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:57,033 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:57,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1816712, now seen corresponding path program 135 times [2018-09-30 10:50:57,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:57,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:57,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:57,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:57,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:58,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:58,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:50:58,098 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:50:58,238 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2018-09-30 10:50:58,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:58,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:58,536 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:58,536 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137] total 137 [2018-09-30 10:50:58,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 10:50:58,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 10:50:58,539 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:58,539 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 138 states. [2018-09-30 10:51:00,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:00,072 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-09-30 10:51:00,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-09-30 10:51:00,072 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 138 [2018-09-30 10:51:00,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:00,073 INFO L225 Difference]: With dead ends: 142 [2018-09-30 10:51:00,073 INFO L226 Difference]: Without dead ends: 140 [2018-09-30 10:51:00,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:00,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-30 10:51:00,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-30 10:51:00,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-30 10:51:00,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-30 10:51:00,075 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 138 [2018-09-30 10:51:00,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:00,075 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-30 10:51:00,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 10:51:00,076 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-30 10:51:00,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-30 10:51:00,076 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:00,076 INFO L375 BasicCegarLoop]: trace histogram [136, 1, 1, 1] [2018-09-30 10:51:00,077 INFO L423 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:00,077 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:00,077 INFO L82 PathProgramCache]: Analyzing trace with hash 56316097, now seen corresponding path program 136 times [2018-09-30 10:51:00,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:00,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:00,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:00,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:00,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:01,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:01,236 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 [2018-09-30 10:51:01,244 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:51:01,318 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:51:01,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:01,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:01,605 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:01,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 138] total 138 [2018-09-30 10:51:01,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-09-30 10:51:01,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-09-30 10:51:01,608 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:01,608 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 139 states. [2018-09-30 10:51:03,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:03,605 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-30 10:51:03,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-09-30 10:51:03,605 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 139 [2018-09-30 10:51:03,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:03,605 INFO L225 Difference]: With dead ends: 143 [2018-09-30 10:51:03,606 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 10:51:03,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:03,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 10:51:03,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 10:51:03,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 10:51:03,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-30 10:51:03,608 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 139 [2018-09-30 10:51:03,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:03,608 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-30 10:51:03,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-09-30 10:51:03,608 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-30 10:51:03,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 10:51:03,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:03,609 INFO L375 BasicCegarLoop]: trace histogram [137, 1, 1, 1] [2018-09-30 10:51:03,609 INFO L423 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:03,609 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:03,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1745797032, now seen corresponding path program 137 times [2018-09-30 10:51:03,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:03,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:03,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:03,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:03,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:04,843 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:04,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:51:04,851 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:51:05,011 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2018-09-30 10:51:05,012 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:05,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:05,317 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:05,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139] total 139 [2018-09-30 10:51:05,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-30 10:51:05,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-30 10:51:05,319 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:05,319 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 140 states. [2018-09-30 10:51:07,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:07,048 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2018-09-30 10:51:07,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-09-30 10:51:07,048 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 140 [2018-09-30 10:51:07,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:07,048 INFO L225 Difference]: With dead ends: 144 [2018-09-30 10:51:07,048 INFO L226 Difference]: Without dead ends: 142 [2018-09-30 10:51:07,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:07,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-30 10:51:07,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-30 10:51:07,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-30 10:51:07,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-30 10:51:07,051 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 140 [2018-09-30 10:51:07,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:07,051 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-30 10:51:07,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-30 10:51:07,051 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-30 10:51:07,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-30 10:51:07,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:07,051 INFO L375 BasicCegarLoop]: trace histogram [138, 1, 1, 1] [2018-09-30 10:51:07,052 INFO L423 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:07,052 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:07,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1714868831, now seen corresponding path program 138 times [2018-09-30 10:51:07,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:07,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:07,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:07,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:07,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:08,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:08,181 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:08,181 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:51:08,189 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:51:08,326 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2018-09-30 10:51:08,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:08,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:08,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:08,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 140] total 140 [2018-09-30 10:51:08,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-09-30 10:51:08,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-09-30 10:51:08,619 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:08,619 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 141 states. [2018-09-30 10:51:10,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:10,611 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-30 10:51:10,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-09-30 10:51:10,611 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 141 [2018-09-30 10:51:10,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:10,612 INFO L225 Difference]: With dead ends: 145 [2018-09-30 10:51:10,612 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 10:51:10,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:10,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 10:51:10,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-30 10:51:10,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 10:51:10,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-30 10:51:10,614 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 141 [2018-09-30 10:51:10,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:10,614 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-30 10:51:10,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-09-30 10:51:10,614 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-30 10:51:10,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 10:51:10,615 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:10,615 INFO L375 BasicCegarLoop]: trace histogram [139, 1, 1, 1] [2018-09-30 10:51:10,615 INFO L423 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:10,615 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:10,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1621328184, now seen corresponding path program 139 times [2018-09-30 10:51:10,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:10,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:10,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:10,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:10,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:11,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:11,708 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 [2018-09-30 10:51:11,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:51:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:11,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:12,095 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:12,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141, 141] total 141 [2018-09-30 10:51:12,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 10:51:12,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 10:51:12,097 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:12,097 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 142 states. [2018-09-30 10:51:13,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:13,898 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-09-30 10:51:13,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-09-30 10:51:13,898 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 142 [2018-09-30 10:51:13,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:13,899 INFO L225 Difference]: With dead ends: 146 [2018-09-30 10:51:13,899 INFO L226 Difference]: Without dead ends: 144 [2018-09-30 10:51:13,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:13,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-30 10:51:13,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-09-30 10:51:13,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-30 10:51:13,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-09-30 10:51:13,901 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 142 [2018-09-30 10:51:13,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:13,901 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-09-30 10:51:13,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 10:51:13,901 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-09-30 10:51:13,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-30 10:51:13,902 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:13,902 INFO L375 BasicCegarLoop]: trace histogram [140, 1, 1, 1] [2018-09-30 10:51:13,902 INFO L423 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:13,902 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:13,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1278431873, now seen corresponding path program 140 times [2018-09-30 10:51:13,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:13,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:13,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:13,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:51:13,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:13,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:15,189 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:15,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:51:15,196 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:51:15,273 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:51:15,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:15,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:15,568 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:15,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [142, 142] total 142 [2018-09-30 10:51:15,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-09-30 10:51:15,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-09-30 10:51:15,571 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:15,571 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 143 states. [2018-09-30 10:51:17,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:17,641 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-30 10:51:17,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-09-30 10:51:17,641 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 143 [2018-09-30 10:51:17,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:17,641 INFO L225 Difference]: With dead ends: 147 [2018-09-30 10:51:17,641 INFO L226 Difference]: Without dead ends: 145 [2018-09-30 10:51:17,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:17,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-30 10:51:17,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-30 10:51:17,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 10:51:17,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-30 10:51:17,644 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 143 [2018-09-30 10:51:17,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:17,644 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-30 10:51:17,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-09-30 10:51:17,644 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-30 10:51:17,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-30 10:51:17,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:17,644 INFO L375 BasicCegarLoop]: trace histogram [141, 1, 1, 1] [2018-09-30 10:51:17,645 INFO L423 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:17,645 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:17,645 INFO L82 PathProgramCache]: Analyzing trace with hash 976680424, now seen corresponding path program 141 times [2018-09-30 10:51:17,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:17,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:17,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:17,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:17,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:18,773 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:18,773 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 [2018-09-30 10:51:18,780 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:51:18,928 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2018-09-30 10:51:18,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:18,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:19,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:19,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143, 143] total 143 [2018-09-30 10:51:19,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-30 10:51:19,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-30 10:51:19,245 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:19,245 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 144 states. [2018-09-30 10:51:21,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:21,034 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-09-30 10:51:21,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-09-30 10:51:21,034 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 144 [2018-09-30 10:51:21,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:21,034 INFO L225 Difference]: With dead ends: 148 [2018-09-30 10:51:21,035 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 10:51:21,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:21,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 10:51:21,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-30 10:51:21,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-30 10:51:21,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-09-30 10:51:21,037 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 144 [2018-09-30 10:51:21,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:21,037 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-09-30 10:51:21,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-30 10:51:21,037 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-09-30 10:51:21,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-30 10:51:21,038 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:21,038 INFO L375 BasicCegarLoop]: trace histogram [142, 1, 1, 1] [2018-09-30 10:51:21,038 INFO L423 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:21,038 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:21,038 INFO L82 PathProgramCache]: Analyzing trace with hash 212320097, now seen corresponding path program 142 times [2018-09-30 10:51:21,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:21,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:21,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:21,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:21,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:22,181 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:22,181 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:51:22,187 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:51:22,273 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:51:22,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:22,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:22,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:22,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144, 144] total 144 [2018-09-30 10:51:22,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-09-30 10:51:22,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-09-30 10:51:22,635 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:22,635 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 145 states. [2018-09-30 10:51:24,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:24,854 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-30 10:51:24,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-09-30 10:51:24,854 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 145 [2018-09-30 10:51:24,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:24,855 INFO L225 Difference]: With dead ends: 149 [2018-09-30 10:51:24,855 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 10:51:24,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:24,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 10:51:24,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-30 10:51:24,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 10:51:24,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-30 10:51:24,857 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 145 [2018-09-30 10:51:24,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:24,858 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-30 10:51:24,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-09-30 10:51:24,858 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-30 10:51:24,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 10:51:24,858 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:24,858 INFO L375 BasicCegarLoop]: trace histogram [143, 1, 1, 1] [2018-09-30 10:51:24,859 INFO L423 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:24,859 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:24,859 INFO L82 PathProgramCache]: Analyzing trace with hash -2008013560, now seen corresponding path program 143 times [2018-09-30 10:51:24,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:24,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:24,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:24,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:24,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:26,008 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:26,008 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 [2018-09-30 10:51:26,015 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:51:26,188 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-09-30 10:51:26,188 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:26,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:26,489 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:26,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 145] total 145 [2018-09-30 10:51:26,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-30 10:51:26,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-30 10:51:26,492 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:26,492 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 146 states. [2018-09-30 10:51:28,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:28,579 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2018-09-30 10:51:28,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-09-30 10:51:28,580 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 146 [2018-09-30 10:51:28,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:28,580 INFO L225 Difference]: With dead ends: 150 [2018-09-30 10:51:28,580 INFO L226 Difference]: Without dead ends: 148 [2018-09-30 10:51:28,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:28,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-30 10:51:28,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-30 10:51:28,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-30 10:51:28,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-09-30 10:51:28,583 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 146 [2018-09-30 10:51:28,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:28,583 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-09-30 10:51:28,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-30 10:51:28,584 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-09-30 10:51:28,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-30 10:51:28,584 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:28,584 INFO L375 BasicCegarLoop]: trace histogram [144, 1, 1, 1] [2018-09-30 10:51:28,585 INFO L423 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:28,585 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:28,585 INFO L82 PathProgramCache]: Analyzing trace with hash -2118880191, now seen corresponding path program 144 times [2018-09-30 10:51:28,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:28,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:28,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:28,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:28,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:29,867 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:29,867 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:51:29,875 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:51:30,024 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 10:51:30,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:51:30,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:30,329 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:30,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 146] total 146 [2018-09-30 10:51:30,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-09-30 10:51:30,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-09-30 10:51:30,332 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:30,332 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 147 states. [2018-09-30 10:51:32,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:51:32,088 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-30 10:51:32,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-09-30 10:51:32,089 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 147 [2018-09-30 10:51:32,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:51:32,089 INFO L225 Difference]: With dead ends: 151 [2018-09-30 10:51:32,089 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 10:51:32,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:51:32,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 10:51:32,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 10:51:32,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 10:51:32,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-30 10:51:32,092 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 147 [2018-09-30 10:51:32,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:51:32,092 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-30 10:51:32,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-09-30 10:51:32,092 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-30 10:51:32,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 10:51:32,092 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:51:32,092 INFO L375 BasicCegarLoop]: trace histogram [145, 1, 1, 1] [2018-09-30 10:51:32,092 INFO L423 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:51:32,093 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:51:32,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1260778456, now seen corresponding path program 145 times [2018-09-30 10:51:32,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:51:32,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:51:32,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:32,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:51:32,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:51:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:33,295 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:51:33,295 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 [2018-09-30 10:51:33,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:51:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:51:33,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:51:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:51:33,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:51:33,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 147] total 147 [2018-09-30 10:51:33,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-30 10:51:33,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-30 10:51:33,691 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:51:33,691 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 148 states. Received shutdown request... [2018-09-30 10:51:34,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 10:51:34,087 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 10:51:34,091 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 10:51:34,092 INFO L202 PluginConnector]: Adding new model overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 10:51:34 BoogieIcfgContainer [2018-09-30 10:51:34,092 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 10:51:34,092 INFO L168 Benchmark]: Toolchain (without parser) took 243858.13 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 30.9 MB). Free memory was 1.4 GB in the beginning and 960.0 MB in the end (delta: 462.7 MB). Peak memory consumption was 493.6 MB. Max. memory is 7.1 GB. [2018-09-30 10:51:34,094 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:51:34,094 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.80 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:51:34,095 INFO L168 Benchmark]: Boogie Preprocessor took 22.49 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:51:34,095 INFO L168 Benchmark]: RCFGBuilder took 288.02 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 10:51:34,095 INFO L168 Benchmark]: TraceAbstraction took 243500.12 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 30.9 MB). Free memory was 1.4 GB in the beginning and 960.0 MB in the end (delta: 441.5 MB). Peak memory consumption was 472.5 MB. Max. memory is 7.1 GB. [2018-09-30 10:51:34,098 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 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.80 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.49 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 288.02 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 243500.12 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 30.9 MB). Free memory was 1.4 GB in the beginning and 960.0 MB in the end (delta: 441.5 MB). Peak memory consumption was 472.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 31]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 31). Cancelled while BasicCegarLoop was constructing difference of abstraction (149states) and FLOYD_HOARE automaton (currently 57 states, 148 states before enhancement), while ReachableStatesComputation was computing reachable states (55 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 243.4s OverallTime, 146 OverallIterations, 145 TraceHistogramMax, 112.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 436 SDtfs, 0 SDslu, 6280 SDs, 0 SdLazy, 17065 SolverSat, 245 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21752 GetRequests, 11021 SyntacticMatches, 0 SemanticMatches, 10731 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=149occurred in iteration=145, 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, 145 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 9.4s SatisfiabilityAnalysisTime, 114.3s InterpolantComputationTime, 22043 NumberOfCodeBlocks, 22043 NumberOfCodeBlocksAsserted, 3015 NumberOfCheckSat, 21752 ConstructedInterpolants, 0 QuantifiedInterpolants, 6374498 SizeOfPredicates, 145 NumberOfNonLiveVariables, 44950 ConjunctsInSsa, 10875 ConjunctsInUnsatCore, 291 InterpolantComputations, 1 PerfectInterpolantSequences, 0/1037330 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/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_10-51-34-111.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_10-51-34-111.csv Completed graceful shutdown