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-c372c2b [2018-10-02 12:08:08,495 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 12:08:08,497 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 12:08:08,513 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 12:08:08,514 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 12:08:08,515 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 12:08:08,517 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 12:08:08,519 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 12:08:08,520 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 12:08:08,521 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 12:08:08,522 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-02 12:08:08,522 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-02 12:08:08,523 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-02 12:08:08,524 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-02 12:08:08,525 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-02 12:08:08,526 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-02 12:08:08,527 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-02 12:08:08,529 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-02 12:08:08,531 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-02 12:08:08,532 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-02 12:08:08,533 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-02 12:08:08,535 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-02 12:08:08,537 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-02 12:08:08,549 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-02 12:08:08,579 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 12:08:08,579 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 12:08:08,581 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 12:08:08,582 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 12:08:08,582 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 12:08:08,582 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 12:08:08,583 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 12:08:08,583 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 12:08:08,583 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 12:08:08,583 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 12:08:08,583 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 12:08:08,584 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 12:08:08,584 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 12:08:08,584 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 12:08:08,584 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 12:08:08,584 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 12:08:08,585 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 12:08:08,585 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 12:08:08,585 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 12:08:08,585 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 12:08:08,585 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 12:08:08,586 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 12:08:08,586 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 12:08:08,586 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 12:08:08,586 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 12:08:08,586 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 12:08:08,587 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 12:08:08,587 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 12:08:08,587 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 12:08:08,587 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 12:08:08,587 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-02 12:08:08,645 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 12:08:08,663 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 12:08:08,671 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 12:08:08,673 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 12:08:08,673 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 12:08:08,674 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl [2018-10-02 12:08:08,675 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl' [2018-10-02 12:08:08,730 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 12:08:08,733 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 12:08:08,734 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 12:08:08,734 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 12:08:08,734 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 12:08:08,755 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 02.10 12:08:08" (1/1) ... [2018-10-02 12:08:08,767 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 02.10 12:08:08" (1/1) ... [2018-10-02 12:08:08,774 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 12:08:08,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 12:08:08,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 12:08:08,776 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 12:08:08,787 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 02.10 12:08:08" (1/1) ... [2018-10-02 12:08:08,788 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 02.10 12:08:08" (1/1) ... [2018-10-02 12:08:08,788 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 02.10 12:08:08" (1/1) ... [2018-10-02 12:08:08,789 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 02.10 12:08:08" (1/1) ... [2018-10-02 12:08:08,791 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 02.10 12:08:08" (1/1) ... [2018-10-02 12:08:08,793 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 02.10 12:08:08" (1/1) ... [2018-10-02 12:08:08,793 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 02.10 12:08:08" (1/1) ... [2018-10-02 12:08:08,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 12:08:08,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 12:08:08,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 12:08:08,796 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 12:08:08,797 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 02.10 12:08:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 12:08:08,872 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-02 12:08:08,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-02 12:08:08,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-02 12:08:09,089 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-02 12:08:09,090 INFO L202 PluginConnector]: Adding new model overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:08:09 BoogieIcfgContainer [2018-10-02 12:08:09,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 12:08:09,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 12:08:09,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 12:08:09,095 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 12:08:09,095 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 02.10 12:08:08" (1/2) ... [2018-10-02 12:08:09,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b071ec and model type overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 12:08:09, skipping insertion in model container [2018-10-02 12:08:09,096 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 02.10 12:08:09" (2/2) ... [2018-10-02 12:08:09,098 INFO L112 eAbstractionObserver]: Analyzing ICFG overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl [2018-10-02 12:08:09,109 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 12:08:09,117 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 12:08:09,165 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 12:08:09,166 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 12:08:09,166 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 12:08:09,166 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 12:08:09,166 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 12:08:09,166 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 12:08:09,166 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 12:08:09,167 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 12:08:09,167 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 12:08:09,180 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-02 12:08:09,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-02 12:08:09,187 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:09,188 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-02 12:08:09,189 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:09,194 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:09,195 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-10-02 12:08:09,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:09,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:09,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:09,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:09,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:09,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:09,388 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 12:08:09,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-02 12:08:09,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 12:08:09,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 12:08:09,410 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:09,412 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-02 12:08:09,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:09,544 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-10-02 12:08:09,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 12:08:09,547 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-02 12:08:09,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:09,562 INFO L225 Difference]: With dead ends: 9 [2018-10-02 12:08:09,562 INFO L226 Difference]: Without dead ends: 5 [2018-10-02 12:08:09,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime [2018-10-02 12:08:09,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-02 12:08:09,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-02 12:08:09,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-02 12:08:09,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-02 12:08:09,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-02 12:08:09,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:09,611 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-02 12:08:09,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 12:08:09,611 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-02 12:08:09,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-02 12:08:09,612 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:09,612 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-02 12:08:09,612 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:09,613 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:09,613 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-10-02 12:08:09,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:09,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:09,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:09,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:09,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:09,687 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:09,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:09,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:09,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:09,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:09,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:09,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-02 12:08:09,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 12:08:09,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 12:08:09,800 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:09,800 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-10-02 12:08:09,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:09,876 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-02 12:08:09,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 12:08:09,877 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-10-02 12:08:09,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:09,877 INFO L225 Difference]: With dead ends: 8 [2018-10-02 12:08:09,878 INFO L226 Difference]: Without dead ends: 6 [2018-10-02 12:08:09,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime [2018-10-02 12:08:09,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-02 12:08:09,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-02 12:08:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-02 12:08:09,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-02 12:08:09,881 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-02 12:08:09,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:09,881 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-02 12:08:09,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 12:08:09,882 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-02 12:08:09,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-02 12:08:09,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:09,882 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-02 12:08:09,883 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:09,883 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:09,883 INFO L82 PathProgramCache]: Analyzing trace with hash 28783137, now seen corresponding path program 2 times [2018-10-02 12:08:09,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:09,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:09,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:09,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:09,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:09,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:09,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:09,996 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:08:10,016 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:08:10,017 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:10,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:10,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:10,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-02 12:08:10,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 12:08:10,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 12:08:10,057 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:10,057 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-10-02 12:08:10,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:10,191 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-02 12:08:10,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 12:08:10,192 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-10-02 12:08:10,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:10,192 INFO L225 Difference]: With dead ends: 9 [2018-10-02 12:08:10,193 INFO L226 Difference]: Without dead ends: 7 [2018-10-02 12:08:10,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime [2018-10-02 12:08:10,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-02 12:08:10,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-02 12:08:10,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-02 12:08:10,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-02 12:08:10,196 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-02 12:08:10,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:10,197 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-02 12:08:10,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 12:08:10,197 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-02 12:08:10,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 12:08:10,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:10,198 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-10-02 12:08:10,198 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:10,199 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:10,199 INFO L82 PathProgramCache]: Analyzing trace with hash 892275272, now seen corresponding path program 3 times [2018-10-02 12:08:10,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:10,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:10,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:10,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:10,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:10,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:10,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:10,494 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:08:10,503 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-02 12:08:10,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:10,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:10,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:10,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-02 12:08:10,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 12:08:10,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 12:08:10,607 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:10,607 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-10-02 12:08:10,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:10,680 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-02 12:08:10,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 12:08:10,682 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-10-02 12:08:10,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:10,683 INFO L225 Difference]: With dead ends: 10 [2018-10-02 12:08:10,683 INFO L226 Difference]: Without dead ends: 8 [2018-10-02 12:08:10,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime [2018-10-02 12:08:10,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-02 12:08:10,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-02 12:08:10,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-02 12:08:10,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-02 12:08:10,687 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-02 12:08:10,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:10,687 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-02 12:08:10,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 12:08:10,688 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-02 12:08:10,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-02 12:08:10,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:10,688 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-10-02 12:08:10,689 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:10,689 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:10,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1890727681, now seen corresponding path program 4 times [2018-10-02 12:08:10,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:10,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:10,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:10,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:10,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:10,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:10,865 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:10,873 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:08:10,884 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:08:10,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:10,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:10,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:10,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 12:08:10,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 12:08:10,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 12:08:10,930 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:10,931 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-10-02 12:08:11,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:11,016 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-02 12:08:11,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 12:08:11,017 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-02 12:08:11,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:11,018 INFO L225 Difference]: With dead ends: 11 [2018-10-02 12:08:11,018 INFO L226 Difference]: Without dead ends: 9 [2018-10-02 12:08:11,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.1s impTime [2018-10-02 12:08:11,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-02 12:08:11,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-02 12:08:11,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-02 12:08:11,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-02 12:08:11,021 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-02 12:08:11,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:11,021 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-02 12:08:11,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 12:08:11,022 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-02 12:08:11,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-02 12:08:11,022 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:11,022 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-10-02 12:08:11,023 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:11,023 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:11,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1516986008, now seen corresponding path program 5 times [2018-10-02 12:08:11,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:11,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:11,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:11,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:11,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:11,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:11,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:11,146 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:08:11,160 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-02 12:08:11,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:11,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:11,221 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:11,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 12:08:11,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 12:08:11,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 12:08:11,222 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:11,223 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-10-02 12:08:11,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:11,743 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-02 12:08:11,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 12:08:11,744 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-10-02 12:08:11,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:11,745 INFO L225 Difference]: With dead ends: 12 [2018-10-02 12:08:11,745 INFO L226 Difference]: Without dead ends: 10 [2018-10-02 12:08:11,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:08:11,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-02 12:08:11,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-02 12:08:11,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-02 12:08:11,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-02 12:08:11,750 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-02 12:08:11,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:11,750 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-02 12:08:11,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 12:08:11,750 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-02 12:08:11,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 12:08:11,754 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:11,754 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-10-02 12:08:11,755 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:11,755 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:11,755 INFO L82 PathProgramCache]: Analyzing trace with hash 218072033, now seen corresponding path program 6 times [2018-10-02 12:08:11,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:11,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:11,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:11,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:11,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:11,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:11,900 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:11,912 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:08:11,922 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-02 12:08:11,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:11,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:11,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:11,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 12:08:11,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 12:08:11,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 12:08:11,982 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:11,982 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-10-02 12:08:12,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:12,095 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-02 12:08:12,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 12:08:12,096 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-10-02 12:08:12,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:12,096 INFO L225 Difference]: With dead ends: 13 [2018-10-02 12:08:12,097 INFO L226 Difference]: Without dead ends: 11 [2018-10-02 12:08:12,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:08:12,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-02 12:08:12,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-02 12:08:12,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 12:08:12,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-02 12:08:12,100 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-02 12:08:12,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:12,100 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-02 12:08:12,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 12:08:12,101 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-02 12:08:12,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-02 12:08:12,101 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:12,101 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-10-02 12:08:12,102 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:12,102 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:12,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1829703544, now seen corresponding path program 7 times [2018-10-02 12:08:12,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:12,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:12,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:12,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:12,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:12,269 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:12,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:12,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:12,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:12,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:12,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:12,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 12:08:12,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 12:08:12,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 12:08:12,370 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:12,370 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-10-02 12:08:12,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:12,468 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-02 12:08:12,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 12:08:12,472 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-02 12:08:12,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:12,473 INFO L225 Difference]: With dead ends: 14 [2018-10-02 12:08:12,474 INFO L226 Difference]: Without dead ends: 12 [2018-10-02 12:08:12,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:08:12,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-02 12:08:12,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-02 12:08:12,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-02 12:08:12,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-02 12:08:12,477 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-02 12:08:12,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:12,478 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-02 12:08:12,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 12:08:12,478 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-02 12:08:12,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 12:08:12,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:12,478 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-10-02 12:08:12,479 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:12,479 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:12,479 INFO L82 PathProgramCache]: Analyzing trace with hash -886236991, now seen corresponding path program 8 times [2018-10-02 12:08:12,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:12,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:12,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:12,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:12,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:12,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:12,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:12,680 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:08:12,691 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:08:12,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:12,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:12,740 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:12,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:12,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 12:08:12,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 12:08:12,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 12:08:12,764 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:12,764 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-10-02 12:08:12,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:12,898 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-02 12:08:12,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 12:08:12,899 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-10-02 12:08:12,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:12,900 INFO L225 Difference]: With dead ends: 15 [2018-10-02 12:08:12,900 INFO L226 Difference]: Without dead ends: 13 [2018-10-02 12:08:12,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.1s impTime [2018-10-02 12:08:12,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-02 12:08:12,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-02 12:08:12,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-02 12:08:12,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-02 12:08:12,904 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-02 12:08:12,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:12,905 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-02 12:08:12,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 12:08:12,905 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-02 12:08:12,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-02 12:08:12,906 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:12,906 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-10-02 12:08:12,906 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:12,906 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:12,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1703544920, now seen corresponding path program 9 times [2018-10-02 12:08:12,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:12,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:12,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:12,908 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:12,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:13,079 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:13,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:13,080 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:13,090 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:08:13,130 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-02 12:08:13,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:13,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:13,175 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:13,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:13,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-02 12:08:13,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 12:08:13,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 12:08:13,198 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:13,198 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-10-02 12:08:13,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:13,289 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-02 12:08:13,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 12:08:13,290 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-10-02 12:08:13,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:13,291 INFO L225 Difference]: With dead ends: 16 [2018-10-02 12:08:13,291 INFO L226 Difference]: Without dead ends: 14 [2018-10-02 12:08:13,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:08:13,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-02 12:08:13,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-02 12:08:13,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-02 12:08:13,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-02 12:08:13,294 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-02 12:08:13,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:13,294 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-02 12:08:13,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 12:08:13,295 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-02 12:08:13,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 12:08:13,295 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:13,296 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-10-02 12:08:13,296 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:13,296 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:13,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1270286943, now seen corresponding path program 10 times [2018-10-02 12:08:13,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:13,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:13,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:13,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:13,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:13,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:13,469 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:13,477 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:08:13,492 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:08:13,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:13,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:13,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:13,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-02 12:08:13,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-02 12:08:13,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-02 12:08:13,571 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:13,571 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-10-02 12:08:13,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:13,732 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-02 12:08:13,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 12:08:13,739 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-10-02 12:08:13,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:13,739 INFO L225 Difference]: With dead ends: 17 [2018-10-02 12:08:13,739 INFO L226 Difference]: Without dead ends: 15 [2018-10-02 12:08:13,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:08:13,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-02 12:08:13,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-02 12:08:13,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-02 12:08:13,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-02 12:08:13,743 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-02 12:08:13,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:13,744 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-02 12:08:13,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-02 12:08:13,744 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-02 12:08:13,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-02 12:08:13,744 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:13,745 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-10-02 12:08:13,745 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:13,745 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:13,745 INFO L82 PathProgramCache]: Analyzing trace with hash -724191544, now seen corresponding path program 11 times [2018-10-02 12:08:13,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:13,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:13,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:13,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:13,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:13,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:13,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:13,924 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:08:13,939 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-02 12:08:13,939 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:13,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:14,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:14,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-02 12:08:14,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 12:08:14,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 12:08:14,022 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:14,022 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-10-02 12:08:14,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:14,149 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-02 12:08:14,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 12:08:14,149 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-02 12:08:14,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:14,150 INFO L225 Difference]: With dead ends: 18 [2018-10-02 12:08:14,150 INFO L226 Difference]: Without dead ends: 16 [2018-10-02 12:08:14,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:08:14,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-02 12:08:14,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-02 12:08:14,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-02 12:08:14,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-02 12:08:14,153 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-02 12:08:14,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:14,154 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-02 12:08:14,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 12:08:14,154 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-02 12:08:14,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 12:08:14,154 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:14,154 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-10-02 12:08:14,155 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:14,155 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:14,155 INFO L82 PathProgramCache]: Analyzing trace with hash -975103359, now seen corresponding path program 12 times [2018-10-02 12:08:14,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:14,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:14,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:14,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:14,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:14,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:14,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:14,364 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:08:14,378 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 12:08:14,379 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:14,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:14,446 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:14,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-02 12:08:14,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 12:08:14,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 12:08:14,448 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:14,448 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-10-02 12:08:14,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:14,561 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-02 12:08:14,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 12:08:14,562 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-10-02 12:08:14,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:14,563 INFO L225 Difference]: With dead ends: 19 [2018-10-02 12:08:14,563 INFO L226 Difference]: Without dead ends: 17 [2018-10-02 12:08:14,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:08:14,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-02 12:08:14,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-02 12:08:14,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-02 12:08:14,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-02 12:08:14,568 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-02 12:08:14,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:14,568 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-02 12:08:14,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 12:08:14,569 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-02 12:08:14,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-02 12:08:14,569 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:14,570 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-10-02 12:08:14,570 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:14,570 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:14,570 INFO L82 PathProgramCache]: Analyzing trace with hash -163435032, now seen corresponding path program 13 times [2018-10-02 12:08:14,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:14,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:14,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:14,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:14,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:14,860 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:14,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:14,861 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:14,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:14,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:15,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:15,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-02 12:08:15,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 12:08:15,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 12:08:15,122 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:15,122 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-10-02 12:08:15,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:15,384 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-02 12:08:15,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 12:08:15,385 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-10-02 12:08:15,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:15,386 INFO L225 Difference]: With dead ends: 20 [2018-10-02 12:08:15,386 INFO L226 Difference]: Without dead ends: 18 [2018-10-02 12:08:15,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime [2018-10-02 12:08:15,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-02 12:08:15,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-02 12:08:15,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 12:08:15,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-02 12:08:15,391 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-02 12:08:15,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:15,391 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-02 12:08:15,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 12:08:15,392 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-02 12:08:15,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 12:08:15,392 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:15,392 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-10-02 12:08:15,392 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:15,393 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:15,393 INFO L82 PathProgramCache]: Analyzing trace with hash -771520671, now seen corresponding path program 14 times [2018-10-02 12:08:15,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:15,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:15,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:15,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:15,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:15,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:15,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:15,645 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:15,661 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:08:15,675 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:08:15,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:15,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:15,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:15,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-02 12:08:15,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 12:08:15,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 12:08:15,765 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:15,765 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-10-02 12:08:15,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:15,880 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-02 12:08:15,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 12:08:15,881 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-10-02 12:08:15,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:15,882 INFO L225 Difference]: With dead ends: 21 [2018-10-02 12:08:15,882 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 12:08:15,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:08:15,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 12:08:15,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-02 12:08:15,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 12:08:15,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-02 12:08:15,886 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-02 12:08:15,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:15,886 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-02 12:08:15,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 12:08:15,886 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-02 12:08:15,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-02 12:08:15,887 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:15,887 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-10-02 12:08:15,887 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:15,888 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:15,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1852661000, now seen corresponding path program 15 times [2018-10-02 12:08:15,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:15,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:15,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:15,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:15,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:16,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:16,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:16,270 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:08:16,287 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 12:08:16,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:16,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:16,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:16,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-02 12:08:16,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 12:08:16,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 12:08:16,376 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:16,376 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-10-02 12:08:16,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:16,507 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-02 12:08:16,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 12:08:16,508 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-02 12:08:16,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:16,509 INFO L225 Difference]: With dead ends: 22 [2018-10-02 12:08:16,509 INFO L226 Difference]: Without dead ends: 20 [2018-10-02 12:08:16,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime [2018-10-02 12:08:16,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-02 12:08:16,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-02 12:08:16,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 12:08:16,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-02 12:08:16,513 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-02 12:08:16,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:16,513 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-02 12:08:16,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 12:08:16,513 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-02 12:08:16,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 12:08:16,514 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:16,514 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-10-02 12:08:16,514 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:16,514 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:16,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1597914177, now seen corresponding path program 16 times [2018-10-02 12:08:16,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:16,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:16,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:16,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:16,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:16,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:16,869 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:16,878 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:08:16,903 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:08:16,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:16,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:17,102 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:17,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-02 12:08:17,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-02 12:08:17,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-02 12:08:17,103 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:17,103 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-10-02 12:08:17,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:17,273 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-02 12:08:17,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 12:08:17,275 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-10-02 12:08:17,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:17,275 INFO L225 Difference]: With dead ends: 23 [2018-10-02 12:08:17,275 INFO L226 Difference]: Without dead ends: 21 [2018-10-02 12:08:17,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime [2018-10-02 12:08:17,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-02 12:08:17,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-02 12:08:17,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-02 12:08:17,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-02 12:08:17,280 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-02 12:08:17,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:17,281 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-02 12:08:17,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-02 12:08:17,281 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-02 12:08:17,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-02 12:08:17,281 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:17,281 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-10-02 12:08:17,282 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:17,282 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:17,282 INFO L82 PathProgramCache]: Analyzing trace with hash -2004270040, now seen corresponding path program 17 times [2018-10-02 12:08:17,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:17,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:17,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:17,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:17,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:17,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:17,697 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:17,697 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:17,706 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:08:17,721 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-02 12:08:17,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:17,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:17,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:17,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-02 12:08:17,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 12:08:17,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 12:08:17,811 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:17,812 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-10-02 12:08:17,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:17,952 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-02 12:08:17,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 12:08:17,953 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-10-02 12:08:17,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:17,954 INFO L225 Difference]: With dead ends: 24 [2018-10-02 12:08:17,954 INFO L226 Difference]: Without dead ends: 22 [2018-10-02 12:08:17,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime [2018-10-02 12:08:17,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-02 12:08:17,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-02 12:08:17,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 12:08:17,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-02 12:08:17,958 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-02 12:08:17,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:17,958 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-02 12:08:17,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 12:08:17,959 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-02 12:08:17,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-02 12:08:17,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:17,959 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-10-02 12:08:17,960 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:17,960 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:17,960 INFO L82 PathProgramCache]: Analyzing trace with hash -2002831071, now seen corresponding path program 18 times [2018-10-02 12:08:17,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:17,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:17,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:17,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:17,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:18,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:18,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:18,226 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:08:18,386 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-02 12:08:18,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:18,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:18,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:18,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-02 12:08:18,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-02 12:08:18,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-02 12:08:18,597 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:18,597 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-10-02 12:08:18,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:18,821 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-02 12:08:18,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 12:08:18,822 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-10-02 12:08:18,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:18,822 INFO L225 Difference]: With dead ends: 25 [2018-10-02 12:08:18,823 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 12:08:18,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime [2018-10-02 12:08:18,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 12:08:18,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-02 12:08:18,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-02 12:08:18,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-02 12:08:18,827 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-02 12:08:18,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:18,827 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-02 12:08:18,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-02 12:08:18,828 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-02 12:08:18,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-02 12:08:18,828 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:18,828 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-10-02 12:08:18,829 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:18,829 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:18,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1958223032, now seen corresponding path program 19 times [2018-10-02 12:08:18,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:18,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:18,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:18,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:18,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:19,229 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:19,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:19,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:19,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:19,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:19,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-02 12:08:19,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 12:08:19,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 12:08:19,398 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:19,398 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-10-02 12:08:19,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:19,543 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-02 12:08:19,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 12:08:19,543 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-02 12:08:19,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:19,544 INFO L225 Difference]: With dead ends: 26 [2018-10-02 12:08:19,544 INFO L226 Difference]: Without dead ends: 24 [2018-10-02 12:08:19,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime [2018-10-02 12:08:19,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-02 12:08:19,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-02 12:08:19,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 12:08:19,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-02 12:08:19,548 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-02 12:08:19,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:19,548 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-02 12:08:19,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 12:08:19,548 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-02 12:08:19,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-02 12:08:19,549 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:19,549 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-10-02 12:08:19,549 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:19,549 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:19,550 INFO L82 PathProgramCache]: Analyzing trace with hash -575373823, now seen corresponding path program 20 times [2018-10-02 12:08:19,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:19,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:19,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:19,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:19,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:19,886 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:19,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:19,886 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:19,894 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:08:19,906 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:08:19,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:19,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:20,024 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:20,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:20,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-02 12:08:20,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-02 12:08:20,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-02 12:08:20,055 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:20,056 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-10-02 12:08:20,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:20,203 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-02 12:08:20,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 12:08:20,203 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-10-02 12:08:20,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:20,204 INFO L225 Difference]: With dead ends: 27 [2018-10-02 12:08:20,205 INFO L226 Difference]: Without dead ends: 25 [2018-10-02 12:08:20,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime [2018-10-02 12:08:20,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-02 12:08:20,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-02 12:08:20,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-02 12:08:20,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-02 12:08:20,209 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-02 12:08:20,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:20,210 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-02 12:08:20,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-02 12:08:20,210 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-02 12:08:20,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-02 12:08:20,210 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:20,211 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-10-02 12:08:20,211 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:20,211 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:20,211 INFO L82 PathProgramCache]: Analyzing trace with hash -656721304, now seen corresponding path program 21 times [2018-10-02 12:08:20,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:20,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:20,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:20,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:20,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:20,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:20,570 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:20,578 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:08:20,599 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-02 12:08:20,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:20,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:20,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:20,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-02 12:08:20,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 12:08:20,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 12:08:20,872 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:20,872 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-10-02 12:08:21,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:21,152 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-02 12:08:21,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 12:08:21,153 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-10-02 12:08:21,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:21,154 INFO L225 Difference]: With dead ends: 28 [2018-10-02 12:08:21,154 INFO L226 Difference]: Without dead ends: 26 [2018-10-02 12:08:21,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime [2018-10-02 12:08:21,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-02 12:08:21,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-02 12:08:21,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 12:08:21,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-02 12:08:21,158 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-02 12:08:21,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:21,158 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-02 12:08:21,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 12:08:21,159 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-02 12:08:21,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-02 12:08:21,159 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:21,159 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-10-02 12:08:21,159 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:21,160 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:21,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1116474081, now seen corresponding path program 22 times [2018-10-02 12:08:21,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:21,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:21,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:21,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:21,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:21,457 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:21,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:21,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:21,465 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:08:21,480 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:08:21,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:21,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:21,641 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:21,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:21,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-02 12:08:21,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-02 12:08:21,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-02 12:08:21,675 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:21,675 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-10-02 12:08:21,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:21,826 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-02 12:08:21,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 12:08:21,826 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-10-02 12:08:21,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:21,826 INFO L225 Difference]: With dead ends: 29 [2018-10-02 12:08:21,826 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 12:08:21,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime [2018-10-02 12:08:21,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 12:08:21,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-02 12:08:21,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-02 12:08:21,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-02 12:08:21,830 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-02 12:08:21,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:21,833 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-02 12:08:21,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-02 12:08:21,833 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-02 12:08:21,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-02 12:08:21,833 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:21,833 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-10-02 12:08:21,834 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:21,834 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:21,834 INFO L82 PathProgramCache]: Analyzing trace with hash 250956168, now seen corresponding path program 23 times [2018-10-02 12:08:21,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:21,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:21,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:21,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:21,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:22,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:22,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:22,091 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:08:22,138 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-02 12:08:22,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:22,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:22,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:22,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-02 12:08:22,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 12:08:22,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 12:08:22,243 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:22,243 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-10-02 12:08:22,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:22,358 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-02 12:08:22,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 12:08:22,365 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-02 12:08:22,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:22,365 INFO L225 Difference]: With dead ends: 30 [2018-10-02 12:08:22,365 INFO L226 Difference]: Without dead ends: 28 [2018-10-02 12:08:22,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:08:22,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-02 12:08:22,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-02 12:08:22,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 12:08:22,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-02 12:08:22,373 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-02 12:08:22,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:22,373 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-02 12:08:22,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 12:08:22,374 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-02 12:08:22,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-02 12:08:22,374 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:22,376 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-10-02 12:08:22,376 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:22,376 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:22,377 INFO L82 PathProgramCache]: Analyzing trace with hash -810295359, now seen corresponding path program 24 times [2018-10-02 12:08:22,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:22,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:22,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:22,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:22,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:22,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:22,873 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:22,880 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:08:22,902 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-02 12:08:22,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:22,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:23,064 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:23,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-02 12:08:23,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-02 12:08:23,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-02 12:08:23,065 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:23,066 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-10-02 12:08:23,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:23,255 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-02 12:08:23,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 12:08:23,256 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-10-02 12:08:23,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:23,256 INFO L225 Difference]: With dead ends: 31 [2018-10-02 12:08:23,256 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 12:08:23,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime [2018-10-02 12:08:23,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 12:08:23,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-02 12:08:23,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-02 12:08:23,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-02 12:08:23,261 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-02 12:08:23,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:23,261 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-02 12:08:23,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-02 12:08:23,261 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-02 12:08:23,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-02 12:08:23,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:23,262 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-10-02 12:08:23,262 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:23,262 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:23,263 INFO L82 PathProgramCache]: Analyzing trace with hash 650645672, now seen corresponding path program 25 times [2018-10-02 12:08:23,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:23,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:23,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:23,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:23,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:23,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:23,901 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:23,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:23,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:24,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:24,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-02 12:08:24,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 12:08:24,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 12:08:24,032 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:24,032 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-10-02 12:08:24,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:24,207 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-02 12:08:24,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 12:08:24,215 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-10-02 12:08:24,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:24,215 INFO L225 Difference]: With dead ends: 32 [2018-10-02 12:08:24,215 INFO L226 Difference]: Without dead ends: 30 [2018-10-02 12:08:24,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.5s impTime [2018-10-02 12:08:24,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-02 12:08:24,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-02 12:08:24,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 12:08:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-02 12:08:24,219 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-02 12:08:24,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:24,219 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-02 12:08:24,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 12:08:24,219 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-02 12:08:24,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-02 12:08:24,220 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:24,220 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-10-02 12:08:24,221 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:24,221 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:24,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1304822623, now seen corresponding path program 26 times [2018-10-02 12:08:24,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:24,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:24,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:24,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:24,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:24,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:24,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:24,598 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:08:24,615 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:08:24,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:24,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:24,683 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:24,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:24,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-02 12:08:24,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 12:08:24,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 12:08:24,706 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:24,706 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-10-02 12:08:24,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:24,924 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-02 12:08:24,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 12:08:24,925 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-10-02 12:08:24,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:24,925 INFO L225 Difference]: With dead ends: 33 [2018-10-02 12:08:24,926 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 12:08:24,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime [2018-10-02 12:08:24,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 12:08:24,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-02 12:08:24,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-02 12:08:24,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-02 12:08:24,929 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-02 12:08:24,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:24,930 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-02 12:08:24,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 12:08:24,930 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-02 12:08:24,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-02 12:08:24,930 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:24,931 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-10-02 12:08:24,931 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:24,931 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:24,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1794797624, now seen corresponding path program 27 times [2018-10-02 12:08:24,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:24,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:24,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:24,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:24,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:26,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:26,382 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:26,389 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:08:26,424 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-02 12:08:26,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:26,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:26,516 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:26,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-02 12:08:26,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 12:08:26,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 12:08:26,517 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:26,517 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-10-02 12:08:26,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:26,691 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-02 12:08:26,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 12:08:26,692 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-02 12:08:26,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:26,692 INFO L225 Difference]: With dead ends: 34 [2018-10-02 12:08:26,692 INFO L226 Difference]: Without dead ends: 32 [2018-10-02 12:08:26,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime [2018-10-02 12:08:26,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-02 12:08:26,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-02 12:08:26,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 12:08:26,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-02 12:08:26,697 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-02 12:08:26,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:26,698 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-02 12:08:26,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 12:08:26,698 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-02 12:08:26,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-02 12:08:26,700 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:26,700 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-10-02 12:08:26,700 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:26,700 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:26,700 INFO L82 PathProgramCache]: Analyzing trace with hash 195846529, now seen corresponding path program 28 times [2018-10-02 12:08:26,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:26,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:26,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:26,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:26,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:27,059 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:27,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:27,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:27,073 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:08:27,101 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:08:27,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:27,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:27,202 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:27,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-02 12:08:27,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-02 12:08:27,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-02 12:08:27,203 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:27,204 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-10-02 12:08:27,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:27,367 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-02 12:08:27,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 12:08:27,368 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-10-02 12:08:27,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:27,368 INFO L225 Difference]: With dead ends: 35 [2018-10-02 12:08:27,368 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 12:08:27,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime [2018-10-02 12:08:27,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 12:08:27,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-02 12:08:27,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-02 12:08:27,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-02 12:08:27,373 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-02 12:08:27,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:27,374 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-02 12:08:27,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-02 12:08:27,374 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-02 12:08:27,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-02 12:08:27,376 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:27,376 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-10-02 12:08:27,376 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:27,377 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:27,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1776273128, now seen corresponding path program 29 times [2018-10-02 12:08:27,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:27,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:27,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:27,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:27,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:27,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:27,873 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:27,881 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:08:27,953 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-02 12:08:27,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:27,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:28,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:28,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-02 12:08:28,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 12:08:28,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 12:08:28,075 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:28,075 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-10-02 12:08:28,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:28,257 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-02 12:08:28,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 12:08:28,258 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-10-02 12:08:28,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:28,259 INFO L225 Difference]: With dead ends: 36 [2018-10-02 12:08:28,259 INFO L226 Difference]: Without dead ends: 34 [2018-10-02 12:08:28,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.4s impTime [2018-10-02 12:08:28,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-02 12:08:28,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-02 12:08:28,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 12:08:28,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-02 12:08:28,263 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-02 12:08:28,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:28,263 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-02 12:08:28,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 12:08:28,263 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-02 12:08:28,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-02 12:08:28,264 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:28,264 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-10-02 12:08:28,264 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:28,264 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:28,265 INFO L82 PathProgramCache]: Analyzing trace with hash -770109855, now seen corresponding path program 30 times [2018-10-02 12:08:28,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:28,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:28,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:28,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:28,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:29,689 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:29,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:29,690 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:29,698 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:08:29,724 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-02 12:08:29,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:29,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:29,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:29,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-02 12:08:29,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-02 12:08:29,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-02 12:08:29,849 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:29,849 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-10-02 12:08:30,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:30,185 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-02 12:08:30,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 12:08:30,186 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-10-02 12:08:30,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:30,187 INFO L225 Difference]: With dead ends: 37 [2018-10-02 12:08:30,187 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 12:08:30,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime [2018-10-02 12:08:30,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 12:08:30,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-02 12:08:30,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-02 12:08:30,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-02 12:08:30,190 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-02 12:08:30,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:30,190 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-02 12:08:30,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-02 12:08:30,190 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-02 12:08:30,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 12:08:30,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:30,191 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-10-02 12:08:30,191 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:30,191 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:30,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1896396296, now seen corresponding path program 31 times [2018-10-02 12:08:30,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:30,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:30,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:30,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:30,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:30,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:30,635 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:30,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:30,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:30,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:30,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:30,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:30,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:30,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-02 12:08:30,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 12:08:30,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 12:08:30,749 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:30,749 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-10-02 12:08:30,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:30,949 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-02 12:08:30,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 12:08:30,950 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-02 12:08:30,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:30,950 INFO L225 Difference]: With dead ends: 38 [2018-10-02 12:08:30,951 INFO L226 Difference]: Without dead ends: 36 [2018-10-02 12:08:30,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime [2018-10-02 12:08:30,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-02 12:08:30,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-02 12:08:30,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-02 12:08:30,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-02 12:08:30,955 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-02 12:08:30,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:30,955 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-02 12:08:30,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 12:08:30,955 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-02 12:08:30,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-02 12:08:30,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:30,956 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-10-02 12:08:30,956 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:30,956 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:30,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1341258943, now seen corresponding path program 32 times [2018-10-02 12:08:30,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:30,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:30,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:30,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:30,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:31,613 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:31,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:31,614 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:31,621 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:08:31,639 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:08:31,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:31,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:31,728 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:31,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:31,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-02 12:08:31,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-02 12:08:31,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-02 12:08:31,749 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:31,749 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-10-02 12:08:31,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:31,967 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-02 12:08:31,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 12:08:31,967 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-10-02 12:08:31,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:31,968 INFO L225 Difference]: With dead ends: 39 [2018-10-02 12:08:31,968 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 12:08:31,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime [2018-10-02 12:08:31,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 12:08:31,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-02 12:08:31,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-02 12:08:31,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-02 12:08:31,972 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-02 12:08:31,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:31,972 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-02 12:08:31,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-02 12:08:31,973 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-02 12:08:31,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-02 12:08:31,973 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:31,973 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-10-02 12:08:31,973 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:31,973 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:31,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1370643752, now seen corresponding path program 33 times [2018-10-02 12:08:31,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:31,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:31,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:31,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:31,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:33,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:33,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:33,065 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:08:33,093 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-02 12:08:33,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:33,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:33,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:33,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-02 12:08:33,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 12:08:33,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 12:08:33,175 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:33,175 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-10-02 12:08:33,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:33,307 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-02 12:08:33,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 12:08:33,308 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-10-02 12:08:33,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:33,308 INFO L225 Difference]: With dead ends: 40 [2018-10-02 12:08:33,308 INFO L226 Difference]: Without dead ends: 38 [2018-10-02 12:08:33,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.8s impTime [2018-10-02 12:08:33,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-02 12:08:33,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-02 12:08:33,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-02 12:08:33,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-02 12:08:33,311 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-02 12:08:33,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:33,312 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-02 12:08:33,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 12:08:33,312 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-02 12:08:33,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-02 12:08:33,312 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:33,312 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-10-02 12:08:33,312 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:33,312 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:33,313 INFO L82 PathProgramCache]: Analyzing trace with hash -459718623, now seen corresponding path program 34 times [2018-10-02 12:08:33,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:33,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:33,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:33,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:33,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:33,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:34,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:34,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:34,191 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:08:34,215 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:08:34,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:34,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:34,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:34,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-02 12:08:34,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-02 12:08:34,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-02 12:08:34,441 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:34,441 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-10-02 12:08:34,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:34,684 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-02 12:08:34,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 12:08:34,685 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-10-02 12:08:34,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:34,685 INFO L225 Difference]: With dead ends: 41 [2018-10-02 12:08:34,686 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 12:08:34,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime [2018-10-02 12:08:34,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 12:08:34,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-02 12:08:34,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-02 12:08:34,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-02 12:08:34,690 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-02 12:08:34,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:34,691 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-02 12:08:34,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-02 12:08:34,691 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-02 12:08:34,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-02 12:08:34,692 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:34,692 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-10-02 12:08:34,692 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:34,692 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:34,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1366377400, now seen corresponding path program 35 times [2018-10-02 12:08:34,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:34,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:34,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:34,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:34,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:35,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:35,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:35,372 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:08:35,398 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-02 12:08:35,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:35,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:35,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:35,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-02 12:08:35,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 12:08:35,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 12:08:35,525 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:35,525 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-10-02 12:08:35,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:35,791 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-02 12:08:35,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 12:08:35,792 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-02 12:08:35,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:35,792 INFO L225 Difference]: With dead ends: 42 [2018-10-02 12:08:35,793 INFO L226 Difference]: Without dead ends: 40 [2018-10-02 12:08:35,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime [2018-10-02 12:08:35,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-02 12:08:35,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-02 12:08:35,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-02 12:08:35,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-02 12:08:35,796 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-02 12:08:35,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:35,796 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-02 12:08:35,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 12:08:35,797 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-02 12:08:35,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-02 12:08:35,797 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:35,797 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-10-02 12:08:35,797 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:35,798 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:35,798 INFO L82 PathProgramCache]: Analyzing trace with hash 591971585, now seen corresponding path program 36 times [2018-10-02 12:08:35,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:35,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:35,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:35,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:35,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:36,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:36,544 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:36,553 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:08:36,585 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-02 12:08:36,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:36,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:37,152 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:37,173 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:37,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-02 12:08:37,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-02 12:08:37,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-02 12:08:37,174 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:37,174 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-10-02 12:08:37,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:37,411 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-02 12:08:37,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 12:08:37,412 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-10-02 12:08:37,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:37,413 INFO L225 Difference]: With dead ends: 43 [2018-10-02 12:08:37,413 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 12:08:37,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.5s impTime [2018-10-02 12:08:37,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 12:08:37,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-02 12:08:37,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-02 12:08:37,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-02 12:08:37,415 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-02 12:08:37,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:37,416 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-02 12:08:37,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-02 12:08:37,416 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-02 12:08:37,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-02 12:08:37,416 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:37,416 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-10-02 12:08:37,416 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:37,417 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:37,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1171247976, now seen corresponding path program 37 times [2018-10-02 12:08:37,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:37,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:37,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:37,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:37,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:38,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:38,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:38,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:38,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:38,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:38,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-02 12:08:38,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 12:08:38,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 12:08:38,498 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:38,499 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-10-02 12:08:38,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:38,776 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-02 12:08:38,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 12:08:38,777 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-10-02 12:08:38,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:38,777 INFO L225 Difference]: With dead ends: 44 [2018-10-02 12:08:38,778 INFO L226 Difference]: Without dead ends: 42 [2018-10-02 12:08:38,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime [2018-10-02 12:08:38,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-02 12:08:38,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-02 12:08:38,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-02 12:08:38,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-02 12:08:38,781 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-02 12:08:38,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:38,781 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-02 12:08:38,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 12:08:38,781 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-02 12:08:38,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-02 12:08:38,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:38,782 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-10-02 12:08:38,782 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:38,782 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:38,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1948946913, now seen corresponding path program 38 times [2018-10-02 12:08:38,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:38,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:38,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:38,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:38,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:39,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:39,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:39,762 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:08:39,784 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:08:39,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:39,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:39,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:39,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-02 12:08:39,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 12:08:39,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 12:08:39,902 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:39,903 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-10-02 12:08:40,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:40,157 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-02 12:08:40,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 12:08:40,157 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-10-02 12:08:40,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:40,158 INFO L225 Difference]: With dead ends: 45 [2018-10-02 12:08:40,158 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 12:08:40,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime [2018-10-02 12:08:40,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 12:08:40,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-02 12:08:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-02 12:08:40,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-02 12:08:40,161 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-02 12:08:40,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:40,161 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-02 12:08:40,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 12:08:40,162 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-02 12:08:40,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-02 12:08:40,162 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:40,162 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-10-02 12:08:40,162 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:40,163 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:40,163 INFO L82 PathProgramCache]: Analyzing trace with hash 287810184, now seen corresponding path program 39 times [2018-10-02 12:08:40,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:40,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:40,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:40,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:40,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:40,910 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:40,910 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:40,918 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:08:40,954 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-02 12:08:40,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:40,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:41,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:41,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-02 12:08:41,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 12:08:41,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 12:08:41,072 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:41,073 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-10-02 12:08:41,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:41,336 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-02 12:08:41,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 12:08:41,336 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-10-02 12:08:41,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:41,337 INFO L225 Difference]: With dead ends: 46 [2018-10-02 12:08:41,337 INFO L226 Difference]: Without dead ends: 44 [2018-10-02 12:08:41,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime [2018-10-02 12:08:41,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-02 12:08:41,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-02 12:08:41,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-02 12:08:41,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-02 12:08:41,340 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-02 12:08:41,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:41,340 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-02 12:08:41,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 12:08:41,340 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-02 12:08:41,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-02 12:08:41,341 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:41,341 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-10-02 12:08:41,341 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:41,341 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:41,341 INFO L82 PathProgramCache]: Analyzing trace with hash 332179137, now seen corresponding path program 40 times [2018-10-02 12:08:41,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:41,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:41,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:41,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:41,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:42,732 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:42,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:42,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:42,747 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:08:42,777 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:08:42,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:42,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:42,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:42,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-02 12:08:42,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-02 12:08:42,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-02 12:08:42,907 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:42,907 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-10-02 12:08:43,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:43,201 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-02 12:08:43,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 12:08:43,201 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-10-02 12:08:43,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:43,202 INFO L225 Difference]: With dead ends: 47 [2018-10-02 12:08:43,202 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 12:08:43,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.1s impTime [2018-10-02 12:08:43,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 12:08:43,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-02 12:08:43,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-02 12:08:43,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-02 12:08:43,205 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-02 12:08:43,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:43,205 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-02 12:08:43,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-02 12:08:43,206 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-02 12:08:43,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-02 12:08:43,206 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:43,206 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-10-02 12:08:43,207 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:43,207 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:43,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1707616680, now seen corresponding path program 41 times [2018-10-02 12:08:43,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:43,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:43,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:43,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:43,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:44,565 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:44,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:44,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:44,573 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:08:44,608 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-02 12:08:44,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:44,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:44,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:44,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-02 12:08:44,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 12:08:44,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 12:08:44,731 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:44,731 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-10-02 12:08:45,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:45,187 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-02 12:08:45,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 12:08:45,188 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-10-02 12:08:45,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:45,188 INFO L225 Difference]: With dead ends: 48 [2018-10-02 12:08:45,188 INFO L226 Difference]: Without dead ends: 46 [2018-10-02 12:08:45,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.1s impTime [2018-10-02 12:08:45,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-02 12:08:45,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-02 12:08:45,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-02 12:08:45,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-02 12:08:45,191 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-02 12:08:45,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:45,192 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-02 12:08:45,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 12:08:45,192 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-02 12:08:45,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-02 12:08:45,192 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:45,192 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-10-02 12:08:45,193 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:45,193 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:45,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1396507553, now seen corresponding path program 42 times [2018-10-02 12:08:45,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:45,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:45,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:45,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:45,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:46,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:46,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:46,073 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:08:46,109 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-02 12:08:46,109 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:46,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:46,215 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:46,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:46,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-02 12:08:46,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-02 12:08:46,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-02 12:08:46,237 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:46,237 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-10-02 12:08:46,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:46,519 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-02 12:08:46,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 12:08:46,519 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-10-02 12:08:46,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:46,520 INFO L225 Difference]: With dead ends: 49 [2018-10-02 12:08:46,520 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 12:08:46,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime [2018-10-02 12:08:46,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 12:08:46,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-02 12:08:46,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-02 12:08:46,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-02 12:08:46,524 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-02 12:08:46,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:46,524 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-02 12:08:46,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-02 12:08:46,524 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-02 12:08:46,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-02 12:08:46,525 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:46,525 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-10-02 12:08:46,525 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:46,525 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:46,525 INFO L82 PathProgramCache]: Analyzing trace with hash 342059208, now seen corresponding path program 43 times [2018-10-02 12:08:46,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:46,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:46,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:46,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:46,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:47,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:47,528 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:47,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:47,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:47,654 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:47,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:47,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-02 12:08:47,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 12:08:47,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 12:08:47,675 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:47,675 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-10-02 12:08:48,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:48,044 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-02 12:08:48,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 12:08:48,051 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-10-02 12:08:48,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:48,051 INFO L225 Difference]: With dead ends: 50 [2018-10-02 12:08:48,051 INFO L226 Difference]: Without dead ends: 48 [2018-10-02 12:08:48,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.8s impTime [2018-10-02 12:08:48,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-02 12:08:48,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-02 12:08:48,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-02 12:08:48,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-02 12:08:48,053 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-02 12:08:48,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:48,053 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-02 12:08:48,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 12:08:48,054 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-02 12:08:48,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-02 12:08:48,054 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:48,054 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-10-02 12:08:48,054 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:48,054 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:48,055 INFO L82 PathProgramCache]: Analyzing trace with hash 2013898881, now seen corresponding path program 44 times [2018-10-02 12:08:48,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:48,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:48,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:48,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:48,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:49,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:49,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:49,037 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:08:49,063 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:08:49,064 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:49,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:49,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:49,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-02 12:08:49,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 12:08:49,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 12:08:49,166 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:49,166 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-10-02 12:08:49,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:49,627 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-02 12:08:49,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 12:08:49,627 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-10-02 12:08:49,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:49,628 INFO L225 Difference]: With dead ends: 51 [2018-10-02 12:08:49,628 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 12:08:49,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.8s impTime [2018-10-02 12:08:49,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 12:08:49,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-02 12:08:49,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-02 12:08:49,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-02 12:08:49,633 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-02 12:08:49,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:49,633 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-02 12:08:49,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 12:08:49,634 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-02 12:08:49,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-02 12:08:49,634 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:49,634 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-10-02 12:08:49,634 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:49,635 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:49,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1993646104, now seen corresponding path program 45 times [2018-10-02 12:08:49,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:49,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:49,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:49,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:49,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:50,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:50,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:50,287 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:08:50,321 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-02 12:08:50,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:50,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:50,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:50,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:50,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-02 12:08:50,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 12:08:50,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 12:08:50,454 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:50,455 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-10-02 12:08:50,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:50,978 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-02 12:08:50,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 12:08:50,979 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-10-02 12:08:50,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:50,980 INFO L225 Difference]: With dead ends: 52 [2018-10-02 12:08:50,980 INFO L226 Difference]: Without dead ends: 50 [2018-10-02 12:08:50,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime [2018-10-02 12:08:50,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-02 12:08:50,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-02 12:08:50,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-02 12:08:50,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-02 12:08:50,982 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-02 12:08:50,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:50,983 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-02 12:08:50,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 12:08:50,983 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-02 12:08:50,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-02 12:08:50,984 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:50,984 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-10-02 12:08:50,984 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:50,984 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:50,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1673489055, now seen corresponding path program 46 times [2018-10-02 12:08:50,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:50,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:50,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:50,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:50,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:52,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:52,773 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:52,781 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:08:52,809 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:08:52,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:52,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:52,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:52,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-02 12:08:52,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-02 12:08:52,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-02 12:08:52,941 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:52,941 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-10-02 12:08:53,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:53,239 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-02 12:08:53,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 12:08:53,240 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-10-02 12:08:53,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:53,240 INFO L225 Difference]: With dead ends: 53 [2018-10-02 12:08:53,241 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 12:08:53,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.4s impTime [2018-10-02 12:08:53,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 12:08:53,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-02 12:08:53,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-02 12:08:53,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-02 12:08:53,243 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-02 12:08:53,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:53,243 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-02 12:08:53,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-02 12:08:53,243 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-02 12:08:53,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-02 12:08:53,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:53,244 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-10-02 12:08:53,244 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:53,244 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:53,244 INFO L82 PathProgramCache]: Analyzing trace with hash -338555128, now seen corresponding path program 47 times [2018-10-02 12:08:53,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:53,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:53,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:53,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:53,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:53,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:53,996 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:54,004 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:08:54,043 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-02 12:08:54,043 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:54,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:54,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:54,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-02 12:08:54,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 12:08:54,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 12:08:54,158 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:54,158 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-10-02 12:08:54,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:54,573 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-02 12:08:54,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 12:08:54,574 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-10-02 12:08:54,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:54,575 INFO L225 Difference]: With dead ends: 54 [2018-10-02 12:08:54,575 INFO L226 Difference]: Without dead ends: 52 [2018-10-02 12:08:54,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime [2018-10-02 12:08:54,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-02 12:08:54,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-02 12:08:54,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-02 12:08:54,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-02 12:08:54,578 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-02 12:08:54,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:54,579 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-02 12:08:54,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 12:08:54,579 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-02 12:08:54,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-02 12:08:54,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:54,580 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-10-02 12:08:54,580 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:54,580 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:54,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1905276351, now seen corresponding path program 48 times [2018-10-02 12:08:54,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:54,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:54,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:54,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:54,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:55,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:55,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:55,380 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:08:55,427 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-02 12:08:55,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:55,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:55,545 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:55,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-02 12:08:55,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-02 12:08:55,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-02 12:08:55,546 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:55,546 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-10-02 12:08:55,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:55,783 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-02 12:08:55,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 12:08:55,783 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-10-02 12:08:55,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:55,784 INFO L225 Difference]: With dead ends: 55 [2018-10-02 12:08:55,784 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 12:08:55,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime [2018-10-02 12:08:55,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 12:08:55,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-02 12:08:55,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-02 12:08:55,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-02 12:08:55,788 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-02 12:08:55,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:55,789 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-02 12:08:55,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-02 12:08:55,789 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-02 12:08:55,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-02 12:08:55,789 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:55,789 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-10-02 12:08:55,789 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:55,790 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:55,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1065973288, now seen corresponding path program 49 times [2018-10-02 12:08:55,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:55,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:55,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:55,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:55,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:56,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:56,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:56,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:56,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:56,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:56,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:56,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-02 12:08:56,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 12:08:56,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 12:08:56,703 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:56,703 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-10-02 12:08:56,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:56,955 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-02 12:08:56,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 12:08:56,955 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-10-02 12:08:56,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:56,956 INFO L225 Difference]: With dead ends: 56 [2018-10-02 12:08:56,956 INFO L226 Difference]: Without dead ends: 54 [2018-10-02 12:08:56,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime [2018-10-02 12:08:56,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-02 12:08:56,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-02 12:08:56,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-02 12:08:56,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-02 12:08:56,959 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-02 12:08:56,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:56,960 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-02 12:08:56,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 12:08:56,960 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-02 12:08:56,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-02 12:08:56,960 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:56,960 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-10-02 12:08:56,961 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:56,961 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:56,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1314568415, now seen corresponding path program 50 times [2018-10-02 12:08:56,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:56,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:56,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:56,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:56,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:57,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:57,725 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:57,725 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:57,738 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:08:57,768 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:08:57,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:57,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:57,892 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:57,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-02 12:08:57,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 12:08:57,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 12:08:57,893 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:57,893 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-10-02 12:08:58,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:58,175 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-02 12:08:58,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 12:08:58,176 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-10-02 12:08:58,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:58,177 INFO L225 Difference]: With dead ends: 57 [2018-10-02 12:08:58,177 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 12:08:58,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime [2018-10-02 12:08:58,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 12:08:58,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-02 12:08:58,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-02 12:08:58,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-02 12:08:58,179 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-02 12:08:58,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:58,180 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-02 12:08:58,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 12:08:58,180 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-02 12:08:58,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-02 12:08:58,180 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:58,180 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-10-02 12:08:58,181 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:58,181 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:58,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2096917176, now seen corresponding path program 51 times [2018-10-02 12:08:58,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:58,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:58,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:58,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:58,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:00,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:00,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:00,066 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:09:00,105 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-02 12:09:00,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:00,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:00,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:00,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-02 12:09:00,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 12:09:00,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 12:09:00,509 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:00,509 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-10-02 12:09:00,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:00,845 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-02 12:09:00,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 12:09:00,846 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-10-02 12:09:00,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:00,846 INFO L225 Difference]: With dead ends: 58 [2018-10-02 12:09:00,846 INFO L226 Difference]: Without dead ends: 56 [2018-10-02 12:09:00,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.6s impTime [2018-10-02 12:09:00,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-02 12:09:00,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-02 12:09:00,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-02 12:09:00,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-02 12:09:00,850 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-02 12:09:00,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:00,850 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-02 12:09:00,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 12:09:00,850 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-02 12:09:00,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-02 12:09:00,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:00,851 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-10-02 12:09:00,851 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:00,851 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:00,851 INFO L82 PathProgramCache]: Analyzing trace with hash -579924991, now seen corresponding path program 52 times [2018-10-02 12:09:00,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:00,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:00,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:00,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:00,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:01,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:01,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:01,852 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:09:01,882 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:09:01,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:01,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:02,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:02,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-02 12:09:02,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-02 12:09:02,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-02 12:09:02,028 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:02,028 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-10-02 12:09:02,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:02,381 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-02 12:09:02,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 12:09:02,381 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-10-02 12:09:02,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:02,382 INFO L225 Difference]: With dead ends: 59 [2018-10-02 12:09:02,383 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 12:09:02,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.8s impTime [2018-10-02 12:09:02,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 12:09:02,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-02 12:09:02,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-02 12:09:02,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-02 12:09:02,385 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-02 12:09:02,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:02,386 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-02 12:09:02,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-02 12:09:02,386 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-02 12:09:02,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-02 12:09:02,386 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:02,387 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-10-02 12:09:02,387 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:02,387 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:02,387 INFO L82 PathProgramCache]: Analyzing trace with hash -797807512, now seen corresponding path program 53 times [2018-10-02 12:09:02,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:02,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:02,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:02,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:02,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:03,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:03,793 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:03,800 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:09:03,840 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-02 12:09:03,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:03,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:04,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:04,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-02 12:09:04,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 12:09:04,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 12:09:04,007 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:04,008 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-10-02 12:09:04,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:04,362 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-02 12:09:04,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 12:09:04,363 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-10-02 12:09:04,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:04,364 INFO L225 Difference]: With dead ends: 60 [2018-10-02 12:09:04,364 INFO L226 Difference]: Without dead ends: 58 [2018-10-02 12:09:04,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.2s impTime [2018-10-02 12:09:04,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-02 12:09:04,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-02 12:09:04,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-02 12:09:04,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-02 12:09:04,366 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-02 12:09:04,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:04,366 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-02 12:09:04,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 12:09:04,367 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-02 12:09:04,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-02 12:09:04,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:04,367 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-10-02 12:09:04,367 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:04,367 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:04,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1037768929, now seen corresponding path program 54 times [2018-10-02 12:09:04,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:04,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:04,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:04,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:04,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:05,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:05,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:05,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:05,787 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:09:05,829 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-02 12:09:05,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:05,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:06,065 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:06,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-02 12:09:06,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-02 12:09:06,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-02 12:09:06,066 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:06,066 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-10-02 12:09:06,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:06,387 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-02 12:09:06,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 12:09:06,388 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-10-02 12:09:06,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:06,389 INFO L225 Difference]: With dead ends: 61 [2018-10-02 12:09:06,389 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 12:09:06,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime [2018-10-02 12:09:06,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 12:09:06,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-02 12:09:06,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-02 12:09:06,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-02 12:09:06,392 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-02 12:09:06,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:06,392 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-02 12:09:06,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-02 12:09:06,393 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-02 12:09:06,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-02 12:09:06,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:06,393 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-10-02 12:09:06,393 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:06,394 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:06,394 INFO L82 PathProgramCache]: Analyzing trace with hash 2106063752, now seen corresponding path program 55 times [2018-10-02 12:09:06,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:06,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:06,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:06,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:06,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:07,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:07,434 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:07,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:09:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:07,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:07,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:07,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-02 12:09:07,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-02 12:09:07,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-02 12:09:07,589 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:07,589 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-10-02 12:09:07,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:07,971 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-02 12:09:07,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-02 12:09:07,972 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-10-02 12:09:07,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:07,973 INFO L225 Difference]: With dead ends: 62 [2018-10-02 12:09:07,973 INFO L226 Difference]: Without dead ends: 60 [2018-10-02 12:09:07,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.9s impTime [2018-10-02 12:09:07,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-02 12:09:07,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-02 12:09:07,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-02 12:09:07,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-02 12:09:07,976 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-02 12:09:07,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:07,977 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-02 12:09:07,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-02 12:09:07,977 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-02 12:09:07,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-02 12:09:07,977 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:07,977 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-10-02 12:09:07,977 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:07,977 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:07,978 INFO L82 PathProgramCache]: Analyzing trace with hash 863464897, now seen corresponding path program 56 times [2018-10-02 12:09:07,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:07,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:07,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:07,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:09:07,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:09,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:09,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:09,209 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:09:09,242 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:09:09,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:09,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:09,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:09,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:09,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-02 12:09:09,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 12:09:09,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 12:09:09,373 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:09,373 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-10-02 12:09:09,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:09,785 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-02 12:09:09,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 12:09:09,786 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-10-02 12:09:09,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:09,786 INFO L225 Difference]: With dead ends: 63 [2018-10-02 12:09:09,787 INFO L226 Difference]: Without dead ends: 61 [2018-10-02 12:09:09,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 1.0s impTime [2018-10-02 12:09:09,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-02 12:09:09,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-02 12:09:09,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-02 12:09:09,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-02 12:09:09,790 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-02 12:09:09,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:09,790 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-02 12:09:09,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 12:09:09,790 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-02 12:09:09,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-02 12:09:09,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:09,791 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-10-02 12:09:09,791 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:09,791 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:09,791 INFO L82 PathProgramCache]: Analyzing trace with hash 997606056, now seen corresponding path program 57 times [2018-10-02 12:09:09,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:09,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:09,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:09,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:09,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:12,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:12,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:12,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:12,146 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:09:12,188 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-02 12:09:12,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:12,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:12,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:12,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-02 12:09:12,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-02 12:09:12,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-02 12:09:12,356 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:12,356 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-10-02 12:09:12,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:12,727 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-02 12:09:12,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-02 12:09:12,727 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-10-02 12:09:12,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:12,728 INFO L225 Difference]: With dead ends: 64 [2018-10-02 12:09:12,728 INFO L226 Difference]: Without dead ends: 62 [2018-10-02 12:09:12,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.0s impTime [2018-10-02 12:09:12,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-02 12:09:12,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-02 12:09:12,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-02 12:09:12,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-02 12:09:12,732 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-02 12:09:12,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:12,733 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-02 12:09:12,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-02 12:09:12,733 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-02 12:09:12,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-02 12:09:12,733 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:12,733 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-10-02 12:09:12,734 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:12,734 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:12,734 INFO L82 PathProgramCache]: Analyzing trace with hash 861014689, now seen corresponding path program 58 times [2018-10-02 12:09:12,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:12,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:12,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:12,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:12,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:14,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:14,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:14,482 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:09:14,514 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:09:14,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:14,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:14,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:14,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:14,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-02 12:09:14,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-02 12:09:14,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-02 12:09:14,644 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:14,644 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-10-02 12:09:15,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:15,175 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-02 12:09:15,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-02 12:09:15,175 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-10-02 12:09:15,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:15,176 INFO L225 Difference]: With dead ends: 65 [2018-10-02 12:09:15,177 INFO L226 Difference]: Without dead ends: 63 [2018-10-02 12:09:15,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.4s impTime [2018-10-02 12:09:15,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-02 12:09:15,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-02 12:09:15,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-02 12:09:15,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-02 12:09:15,180 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-02 12:09:15,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:15,180 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-02 12:09:15,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-02 12:09:15,180 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-02 12:09:15,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-02 12:09:15,180 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:15,180 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-10-02 12:09:15,181 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:15,181 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:15,181 INFO L82 PathProgramCache]: Analyzing trace with hash 921649608, now seen corresponding path program 59 times [2018-10-02 12:09:15,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:15,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:15,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:15,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:15,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:17,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:17,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:17,034 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:09:17,082 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-02 12:09:17,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:17,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:17,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:17,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-02 12:09:17,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-02 12:09:17,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-02 12:09:17,311 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:17,312 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-10-02 12:09:17,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:17,712 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-02 12:09:17,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-02 12:09:17,712 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-10-02 12:09:17,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:17,713 INFO L225 Difference]: With dead ends: 66 [2018-10-02 12:09:17,713 INFO L226 Difference]: Without dead ends: 64 [2018-10-02 12:09:17,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.5s impTime [2018-10-02 12:09:17,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-02 12:09:17,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-02 12:09:17,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-02 12:09:17,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-02 12:09:17,716 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-02 12:09:17,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:17,716 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-02 12:09:17,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-02 12:09:17,716 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-02 12:09:17,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-02 12:09:17,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:17,716 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-10-02 12:09:17,717 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:17,717 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:17,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1493635199, now seen corresponding path program 60 times [2018-10-02 12:09:17,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:17,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:17,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:17,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:17,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:17,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:18,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:18,873 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:18,881 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:09:18,930 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-02 12:09:18,930 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:18,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:19,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:19,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:19,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-02 12:09:19,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-02 12:09:19,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-02 12:09:19,084 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:19,084 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-10-02 12:09:19,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:19,420 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-02 12:09:19,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-02 12:09:19,420 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-10-02 12:09:19,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:19,421 INFO L225 Difference]: With dead ends: 67 [2018-10-02 12:09:19,421 INFO L226 Difference]: Without dead ends: 65 [2018-10-02 12:09:19,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime [2018-10-02 12:09:19,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-02 12:09:19,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-02 12:09:19,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-02 12:09:19,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-02 12:09:19,424 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-02 12:09:19,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:19,425 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-02 12:09:19,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-02 12:09:19,425 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-02 12:09:19,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-02 12:09:19,425 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:19,425 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-10-02 12:09:19,426 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:19,426 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:19,426 INFO L82 PathProgramCache]: Analyzing trace with hash 941947112, now seen corresponding path program 61 times [2018-10-02 12:09:19,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:19,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:19,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:19,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:19,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:20,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:20,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:20,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:09:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:20,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:20,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:20,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-02 12:09:20,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-02 12:09:20,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-02 12:09:20,951 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:20,951 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-10-02 12:09:21,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:21,287 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-02 12:09:21,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-02 12:09:21,288 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-10-02 12:09:21,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:21,289 INFO L225 Difference]: With dead ends: 68 [2018-10-02 12:09:21,289 INFO L226 Difference]: Without dead ends: 66 [2018-10-02 12:09:21,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.1s impTime [2018-10-02 12:09:21,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-02 12:09:21,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-02 12:09:21,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-02 12:09:21,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-02 12:09:21,291 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-02 12:09:21,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:21,291 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-02 12:09:21,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-02 12:09:21,291 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-02 12:09:21,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-02 12:09:21,291 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:21,292 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-10-02 12:09:21,292 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:21,292 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:21,292 INFO L82 PathProgramCache]: Analyzing trace with hash -864412575, now seen corresponding path program 62 times [2018-10-02 12:09:21,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:21,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:21,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:21,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:09:21,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:22,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:22,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:22,365 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:09:22,398 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:09:22,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:22,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:22,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:22,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:22,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-02 12:09:22,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-02 12:09:22,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-02 12:09:22,549 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:22,549 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-10-02 12:09:22,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:22,969 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-02 12:09:22,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 12:09:22,969 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-10-02 12:09:22,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:22,970 INFO L225 Difference]: With dead ends: 69 [2018-10-02 12:09:22,970 INFO L226 Difference]: Without dead ends: 67 [2018-10-02 12:09:22,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.9s impTime [2018-10-02 12:09:22,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-02 12:09:22,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-02 12:09:22,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-02 12:09:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-02 12:09:22,974 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-02 12:09:22,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:22,974 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-02 12:09:22,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-02 12:09:22,975 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-02 12:09:22,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-02 12:09:22,975 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:22,975 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-10-02 12:09:22,975 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:22,976 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:22,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1026988024, now seen corresponding path program 63 times [2018-10-02 12:09:22,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:22,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:22,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:22,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:22,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:24,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:24,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:24,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:24,264 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:09:24,317 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-02 12:09:24,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:24,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:24,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:24,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:24,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-02 12:09:24,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-02 12:09:24,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-02 12:09:24,462 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:24,463 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-10-02 12:09:24,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:24,974 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-02 12:09:24,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-02 12:09:24,975 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-10-02 12:09:24,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:24,976 INFO L225 Difference]: With dead ends: 70 [2018-10-02 12:09:24,976 INFO L226 Difference]: Without dead ends: 68 [2018-10-02 12:09:24,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime [2018-10-02 12:09:24,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-02 12:09:24,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-02 12:09:24,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-02 12:09:24,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-02 12:09:24,979 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-02 12:09:24,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:24,979 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-02 12:09:24,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-02 12:09:24,979 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-02 12:09:24,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-02 12:09:24,980 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:24,980 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-10-02 12:09:24,980 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:24,980 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:24,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1771859647, now seen corresponding path program 64 times [2018-10-02 12:09:24,981 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:24,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:24,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:24,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:24,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:27,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:27,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-02 12:09:27,220 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:27,276 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:09:27,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:27,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:27,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:27,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-02 12:09:27,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-02 12:09:27,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-02 12:09:27,437 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:27,437 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-10-02 12:09:27,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:27,905 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-02 12:09:27,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-02 12:09:27,906 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-10-02 12:09:27,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:27,907 INFO L225 Difference]: With dead ends: 71 [2018-10-02 12:09:27,907 INFO L226 Difference]: Without dead ends: 69 [2018-10-02 12:09:27,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 2.0s impTime [2018-10-02 12:09:27,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-02 12:09:27,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-02 12:09:27,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-02 12:09:27,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-02 12:09:27,910 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-02 12:09:27,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:27,910 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-02 12:09:27,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-02 12:09:27,911 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-02 12:09:27,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-02 12:09:27,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:27,911 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-10-02 12:09:27,911 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:27,913 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:27,913 INFO L82 PathProgramCache]: Analyzing trace with hash 906923816, now seen corresponding path program 65 times [2018-10-02 12:09:27,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:27,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:27,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:27,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:27,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:27,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:29,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:29,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:29,566 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:09:29,624 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-02 12:09:29,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:29,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:29,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:29,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-02 12:09:29,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-02 12:09:29,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-02 12:09:29,827 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:29,827 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-10-02 12:09:30,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:30,417 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-02 12:09:30,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-02 12:09:30,418 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-10-02 12:09:30,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:30,418 INFO L225 Difference]: With dead ends: 72 [2018-10-02 12:09:30,418 INFO L226 Difference]: Without dead ends: 70 [2018-10-02 12:09:30,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.4s impTime [2018-10-02 12:09:30,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-02 12:09:30,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-02 12:09:30,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-02 12:09:30,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-02 12:09:30,420 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-10-02 12:09:30,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:30,421 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-02 12:09:30,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-02 12:09:30,421 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-02 12:09:30,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-02 12:09:30,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:30,421 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-10-02 12:09:30,421 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:30,421 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:30,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1950134751, now seen corresponding path program 66 times [2018-10-02 12:09:30,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:30,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:30,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:30,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:30,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:31,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:31,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:31,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:31,963 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:09:32,014 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-02 12:09:32,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:32,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:32,172 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:32,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-02 12:09:32,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-02 12:09:32,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-02 12:09:32,173 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:32,173 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-10-02 12:09:32,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:32,468 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-02 12:09:32,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-02 12:09:32,469 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-10-02 12:09:32,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:32,469 INFO L225 Difference]: With dead ends: 73 [2018-10-02 12:09:32,470 INFO L226 Difference]: Without dead ends: 71 [2018-10-02 12:09:32,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.3s impTime [2018-10-02 12:09:32,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-02 12:09:32,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-02 12:09:32,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-02 12:09:32,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-02 12:09:32,472 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-10-02 12:09:32,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:32,472 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-02 12:09:32,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-02 12:09:32,472 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-02 12:09:32,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-02 12:09:32,473 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:32,473 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-10-02 12:09:32,473 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:32,473 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:32,473 INFO L82 PathProgramCache]: Analyzing trace with hash -324637112, now seen corresponding path program 67 times [2018-10-02 12:09:32,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:32,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:32,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:32,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:32,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:34,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:34,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:34,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:09:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:34,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:34,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:34,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-02 12:09:34,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-02 12:09:34,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-02 12:09:34,899 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:34,899 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-10-02 12:09:35,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:35,504 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-02 12:09:35,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-02 12:09:35,504 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-10-02 12:09:35,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:35,504 INFO L225 Difference]: With dead ends: 74 [2018-10-02 12:09:35,505 INFO L226 Difference]: Without dead ends: 72 [2018-10-02 12:09:35,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 2.0s impTime [2018-10-02 12:09:35,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-02 12:09:35,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-02 12:09:35,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-02 12:09:35,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-02 12:09:35,508 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-10-02 12:09:35,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:35,508 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-02 12:09:35,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-02 12:09:35,508 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-02 12:09:35,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-02 12:09:35,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:35,509 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-10-02 12:09:35,509 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:35,509 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:35,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1473817855, now seen corresponding path program 68 times [2018-10-02 12:09:35,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:35,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:35,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:35,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:09:35,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:37,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:37,599 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:37,606 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:09:37,643 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:09:37,643 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:37,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:37,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:37,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:37,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-02 12:09:37,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-02 12:09:37,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-02 12:09:37,798 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:37,798 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-10-02 12:09:38,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:38,127 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-02 12:09:38,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-02 12:09:38,128 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-10-02 12:09:38,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:38,128 INFO L225 Difference]: With dead ends: 75 [2018-10-02 12:09:38,129 INFO L226 Difference]: Without dead ends: 73 [2018-10-02 12:09:38,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.9s impTime [2018-10-02 12:09:38,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-02 12:09:38,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-02 12:09:38,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-02 12:09:38,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-02 12:09:38,131 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-10-02 12:09:38,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:38,131 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-02 12:09:38,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-02 12:09:38,131 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-02 12:09:38,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-02 12:09:38,132 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:38,132 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-10-02 12:09:38,132 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:38,132 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:38,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1556284776, now seen corresponding path program 69 times [2018-10-02 12:09:38,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:38,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:38,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:38,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:38,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:40,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:40,794 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:40,801 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:09:40,895 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-02 12:09:40,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:40,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:41,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:41,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-02 12:09:41,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-02 12:09:41,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-02 12:09:41,312 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:41,312 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-10-02 12:09:41,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:41,818 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-02 12:09:41,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-02 12:09:41,818 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-10-02 12:09:41,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:41,819 INFO L225 Difference]: With dead ends: 76 [2018-10-02 12:09:41,819 INFO L226 Difference]: Without dead ends: 74 [2018-10-02 12:09:41,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.4s impTime [2018-10-02 12:09:41,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-02 12:09:41,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-02 12:09:41,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-02 12:09:41,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-02 12:09:41,825 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-10-02 12:09:41,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:41,825 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-02 12:09:41,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-02 12:09:41,825 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-02 12:09:41,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-02 12:09:41,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:41,826 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-10-02 12:09:41,826 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:41,826 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:41,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1000185825, now seen corresponding path program 70 times [2018-10-02 12:09:41,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:41,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:41,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:41,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:41,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:44,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:44,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:44,022 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:09:44,081 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:09:44,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:44,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:44,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:44,340 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:44,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-02 12:09:44,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-02 12:09:44,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-02 12:09:44,341 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:44,341 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-10-02 12:09:44,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:44,773 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-02 12:09:44,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-02 12:09:44,774 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-10-02 12:09:44,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:44,775 INFO L225 Difference]: With dead ends: 77 [2018-10-02 12:09:44,775 INFO L226 Difference]: Without dead ends: 75 [2018-10-02 12:09:44,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.7s impTime [2018-10-02 12:09:44,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-02 12:09:44,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-02 12:09:44,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-02 12:09:44,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-02 12:09:44,778 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-10-02 12:09:44,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:44,778 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-02 12:09:44,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-02 12:09:44,778 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-02 12:09:44,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-02 12:09:44,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:44,779 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-10-02 12:09:44,779 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:44,780 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:44,780 INFO L82 PathProgramCache]: Analyzing trace with hash 940987528, now seen corresponding path program 71 times [2018-10-02 12:09:44,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:44,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:44,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:44,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:44,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:46,895 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:46,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:46,902 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:09:46,962 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-02 12:09:46,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:46,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:47,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:47,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-02 12:09:47,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-02 12:09:47,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-02 12:09:47,398 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:47,398 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-10-02 12:09:47,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:47,861 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-02 12:09:47,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-02 12:09:47,862 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-10-02 12:09:47,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:47,863 INFO L225 Difference]: With dead ends: 78 [2018-10-02 12:09:47,863 INFO L226 Difference]: Without dead ends: 76 [2018-10-02 12:09:47,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 1.9s impTime [2018-10-02 12:09:47,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-02 12:09:47,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-02 12:09:47,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-02 12:09:47,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-02 12:09:47,867 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-10-02 12:09:47,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:47,867 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-02 12:09:47,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-02 12:09:47,867 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-02 12:09:47,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-02 12:09:47,868 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:47,868 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-10-02 12:09:47,868 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:47,868 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:47,869 INFO L82 PathProgramCache]: Analyzing trace with hash -894159679, now seen corresponding path program 72 times [2018-10-02 12:09:47,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:47,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:47,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:47,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:47,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:47,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:50,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:50,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:50,120 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:09:50,181 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-02 12:09:50,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:50,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:50,346 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:50,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-02 12:09:50,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-02 12:09:50,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-02 12:09:50,347 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:50,347 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-10-02 12:09:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:51,064 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-02 12:09:51,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-02 12:09:51,065 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-10-02 12:09:51,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:51,066 INFO L225 Difference]: With dead ends: 79 [2018-10-02 12:09:51,066 INFO L226 Difference]: Without dead ends: 77 [2018-10-02 12:09:51,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 2.0s impTime [2018-10-02 12:09:51,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-02 12:09:51,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-02 12:09:51,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-02 12:09:51,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-02 12:09:51,068 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-10-02 12:09:51,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:51,068 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-02 12:09:51,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-02 12:09:51,068 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-02 12:09:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-02 12:09:51,068 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:51,069 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-10-02 12:09:51,069 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:51,069 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:51,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1949148248, now seen corresponding path program 73 times [2018-10-02 12:09:51,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:51,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:51,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:51,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:51,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:53,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:53,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:53,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:53,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:09:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:53,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:53,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:53,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-02 12:09:53,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-02 12:09:53,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-02 12:09:53,950 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:53,950 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-10-02 12:09:54,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:54,441 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-10-02 12:09:54,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-02 12:09:54,442 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-10-02 12:09:54,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:54,442 INFO L225 Difference]: With dead ends: 80 [2018-10-02 12:09:54,443 INFO L226 Difference]: Without dead ends: 78 [2018-10-02 12:09:54,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.4s impTime [2018-10-02 12:09:54,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-02 12:09:54,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-02 12:09:54,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-02 12:09:54,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-02 12:09:54,445 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-10-02 12:09:54,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:54,446 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-02 12:09:54,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-02 12:09:54,446 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-02 12:09:54,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-02 12:09:54,446 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:54,447 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-10-02 12:09:54,447 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:54,447 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:54,447 INFO L82 PathProgramCache]: Analyzing trace with hash -294055519, now seen corresponding path program 74 times [2018-10-02 12:09:54,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:54,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:54,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:54,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:09:54,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:57,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:57,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:57,088 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:09:57,127 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:09:57,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:57,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:57,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:57,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-02 12:09:57,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-02 12:09:57,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-02 12:09:57,316 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:57,316 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-10-02 12:09:57,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:57,808 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-02 12:09:57,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-02 12:09:57,808 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-10-02 12:09:57,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:57,809 INFO L225 Difference]: With dead ends: 81 [2018-10-02 12:09:57,809 INFO L226 Difference]: Without dead ends: 79 [2018-10-02 12:09:57,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.4s impTime [2018-10-02 12:09:57,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-02 12:09:57,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-02 12:09:57,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-02 12:09:57,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-02 12:09:57,812 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-10-02 12:09:57,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:57,812 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-02 12:09:57,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-02 12:09:57,812 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-02 12:09:57,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-02 12:09:57,812 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:57,812 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-10-02 12:09:57,813 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:57,813 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:57,813 INFO L82 PathProgramCache]: Analyzing trace with hash -525788472, now seen corresponding path program 75 times [2018-10-02 12:09:57,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:57,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:57,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:57,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:57,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:01,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:01,973 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:10:01,980 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:10:02,042 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-02 12:10:02,043 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:02,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:02,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:02,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-02 12:10:02,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-02 12:10:02,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-02 12:10:02,207 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:02,207 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-10-02 12:10:02,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:02,804 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-02 12:10:02,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-02 12:10:02,804 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-10-02 12:10:02,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:02,805 INFO L225 Difference]: With dead ends: 82 [2018-10-02 12:10:02,805 INFO L226 Difference]: Without dead ends: 80 [2018-10-02 12:10:02,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s Time 3.6s impTime [2018-10-02 12:10:02,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-02 12:10:02,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-02 12:10:02,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-02 12:10:02,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-02 12:10:02,807 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-10-02 12:10:02,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:02,808 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-02 12:10:02,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-02 12:10:02,808 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-02 12:10:02,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-02 12:10:02,808 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:02,808 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-10-02 12:10:02,809 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:02,809 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:02,809 INFO L82 PathProgramCache]: Analyzing trace with hash 880424577, now seen corresponding path program 76 times [2018-10-02 12:10:02,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:02,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:02,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:02,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:02,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:05,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:05,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:10:05,403 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:10:05,461 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:10:05,462 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:05,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:05,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:05,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:05,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-02 12:10:05,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-02 12:10:05,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-02 12:10:05,633 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:05,633 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-10-02 12:10:06,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:06,414 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-02 12:10:06,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-02 12:10:06,414 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-10-02 12:10:06,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:06,415 INFO L225 Difference]: With dead ends: 83 [2018-10-02 12:10:06,415 INFO L226 Difference]: Without dead ends: 81 [2018-10-02 12:10:06,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.4s impTime [2018-10-02 12:10:06,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-02 12:10:06,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-02 12:10:06,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-02 12:10:06,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-02 12:10:06,418 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-10-02 12:10:06,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:06,418 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-02 12:10:06,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-02 12:10:06,418 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-02 12:10:06,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-02 12:10:06,418 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:06,419 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-10-02 12:10:06,419 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:06,419 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:06,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1523356136, now seen corresponding path program 77 times [2018-10-02 12:10:06,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:06,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:06,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:06,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:06,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:09,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:09,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:10:09,714 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:10:09,891 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-02 12:10:09,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:09,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:10,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:10,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-02 12:10:10,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-02 12:10:10,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-02 12:10:10,064 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:10,064 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-10-02 12:10:10,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:10,623 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-10-02 12:10:10,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-02 12:10:10,623 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-10-02 12:10:10,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:10,624 INFO L225 Difference]: With dead ends: 84 [2018-10-02 12:10:10,624 INFO L226 Difference]: Without dead ends: 82 [2018-10-02 12:10:10,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.8s impTime [2018-10-02 12:10:10,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-02 12:10:10,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-02 12:10:10,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-02 12:10:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-02 12:10:10,627 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-10-02 12:10:10,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:10,628 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-02 12:10:10,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-02 12:10:10,628 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-02 12:10:10,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-02 12:10:10,628 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:10,629 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-10-02 12:10:10,629 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:10,629 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:10,629 INFO L82 PathProgramCache]: Analyzing trace with hash -20602015, now seen corresponding path program 78 times [2018-10-02 12:10:10,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:10,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:10,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:10,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:10,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:13,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:13,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:10:13,186 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:10:13,634 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-10-02 12:10:13,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:13,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:13,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:13,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-02 12:10:13,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-02 12:10:13,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-02 12:10:13,813 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:13,813 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-10-02 12:10:14,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:14,145 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-02 12:10:14,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-02 12:10:14,145 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-10-02 12:10:14,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:14,146 INFO L225 Difference]: With dead ends: 85 [2018-10-02 12:10:14,146 INFO L226 Difference]: Without dead ends: 83 [2018-10-02 12:10:14,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.1s impTime [2018-10-02 12:10:14,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-02 12:10:14,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-02 12:10:14,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-02 12:10:14,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-02 12:10:14,149 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-10-02 12:10:14,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:14,149 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-02 12:10:14,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-02 12:10:14,149 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-02 12:10:14,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-02 12:10:14,150 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:14,150 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-10-02 12:10:14,150 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:14,150 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:14,151 INFO L82 PathProgramCache]: Analyzing trace with hash -638664440, now seen corresponding path program 79 times [2018-10-02 12:10:14,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:14,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:14,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:14,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:14,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:14,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:16,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:16,841 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:10:16,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:10:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:16,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:17,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:17,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-02 12:10:17,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-02 12:10:17,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-02 12:10:17,118 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:17,118 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-10-02 12:10:17,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:17,599 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-02 12:10:17,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-02 12:10:17,599 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-10-02 12:10:17,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:17,600 INFO L225 Difference]: With dead ends: 86 [2018-10-02 12:10:17,600 INFO L226 Difference]: Without dead ends: 84 [2018-10-02 12:10:17,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.3s impTime [2018-10-02 12:10:17,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-02 12:10:17,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-02 12:10:17,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-02 12:10:17,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-02 12:10:17,602 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-10-02 12:10:17,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:17,603 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-02 12:10:17,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-02 12:10:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-02 12:10:17,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-02 12:10:17,603 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:17,603 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-10-02 12:10:17,603 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:17,604 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:17,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1676236865, now seen corresponding path program 80 times [2018-10-02 12:10:17,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:17,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:17,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:17,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:10:17,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:21,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:21,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:21,008 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:10:21,015 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:10:21,058 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:10:21,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:21,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:22,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:22,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-02 12:10:22,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-02 12:10:22,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-02 12:10:22,102 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:22,103 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-10-02 12:10:22,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:22,677 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-02 12:10:22,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-02 12:10:22,678 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-10-02 12:10:22,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:22,679 INFO L225 Difference]: With dead ends: 87 [2018-10-02 12:10:22,679 INFO L226 Difference]: Without dead ends: 85 [2018-10-02 12:10:22,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s Time 2.9s impTime [2018-10-02 12:10:22,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-02 12:10:22,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-02 12:10:22,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-02 12:10:22,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-02 12:10:22,681 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-10-02 12:10:22,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:22,681 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-02 12:10:22,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-02 12:10:22,681 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-02 12:10:22,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-02 12:10:22,681 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:22,681 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-10-02 12:10:22,682 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:22,682 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:22,682 INFO L82 PathProgramCache]: Analyzing trace with hash 423733288, now seen corresponding path program 81 times [2018-10-02 12:10:22,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:22,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:22,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:22,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:22,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:24,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:24,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:10:24,644 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:10:24,714 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-02 12:10:24,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:24,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:24,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:24,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-02 12:10:24,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-02 12:10:24,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-02 12:10:24,908 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:24,908 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-10-02 12:10:25,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:25,368 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-02 12:10:25,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-02 12:10:25,369 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-10-02 12:10:25,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:25,370 INFO L225 Difference]: With dead ends: 88 [2018-10-02 12:10:25,370 INFO L226 Difference]: Without dead ends: 86 [2018-10-02 12:10:25,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.6s impTime [2018-10-02 12:10:25,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-02 12:10:25,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-02 12:10:25,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-02 12:10:25,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-02 12:10:25,372 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-10-02 12:10:25,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:25,372 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-02 12:10:25,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-02 12:10:25,373 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-02 12:10:25,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-02 12:10:25,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:25,373 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-10-02 12:10:25,373 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:25,373 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:25,373 INFO L82 PathProgramCache]: Analyzing trace with hash 250828065, now seen corresponding path program 82 times [2018-10-02 12:10:25,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:25,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:25,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:25,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:25,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:28,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:28,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:28,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:10:28,279 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:10:28,323 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:10:28,323 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:28,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:29,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:29,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-02 12:10:29,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-02 12:10:29,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-02 12:10:29,817 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:29,817 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-10-02 12:10:30,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:30,948 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-02 12:10:30,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-02 12:10:30,948 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-10-02 12:10:30,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:30,949 INFO L225 Difference]: With dead ends: 89 [2018-10-02 12:10:30,949 INFO L226 Difference]: Without dead ends: 87 [2018-10-02 12:10:30,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s Time 2.7s impTime [2018-10-02 12:10:30,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-02 12:10:30,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-02 12:10:30,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-02 12:10:30,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-02 12:10:30,951 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-10-02 12:10:30,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:30,951 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-02 12:10:30,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-02 12:10:30,951 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-02 12:10:30,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-02 12:10:30,952 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:30,952 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-10-02 12:10:30,952 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:30,952 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:30,952 INFO L82 PathProgramCache]: Analyzing trace with hash -814266552, now seen corresponding path program 83 times [2018-10-02 12:10:30,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:30,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:30,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:30,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:30,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:34,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:34,324 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:10:34,331 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:10:34,404 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-02 12:10:34,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:34,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:34,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:34,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:34,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-02 12:10:34,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-02 12:10:34,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-02 12:10:34,583 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:34,583 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-10-02 12:10:35,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:35,165 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-10-02 12:10:35,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-02 12:10:35,166 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-10-02 12:10:35,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:35,167 INFO L225 Difference]: With dead ends: 90 [2018-10-02 12:10:35,167 INFO L226 Difference]: Without dead ends: 88 [2018-10-02 12:10:35,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 3.1s impTime [2018-10-02 12:10:35,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-02 12:10:35,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-02 12:10:35,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-02 12:10:35,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-02 12:10:35,170 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-10-02 12:10:35,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:35,171 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-02 12:10:35,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-02 12:10:35,171 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-02 12:10:35,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-02 12:10:35,171 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:35,171 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-10-02 12:10:35,172 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:35,172 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:35,172 INFO L82 PathProgramCache]: Analyzing trace with hash 527538689, now seen corresponding path program 84 times [2018-10-02 12:10:35,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:35,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:35,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:35,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:35,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:37,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:37,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:10:37,110 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:10:37,177 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-02 12:10:37,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:37,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:37,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:37,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-02 12:10:37,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-02 12:10:37,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-02 12:10:37,357 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:37,358 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-10-02 12:10:37,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:37,804 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-02 12:10:37,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-02 12:10:37,805 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-10-02 12:10:37,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:37,805 INFO L225 Difference]: With dead ends: 91 [2018-10-02 12:10:37,806 INFO L226 Difference]: Without dead ends: 89 [2018-10-02 12:10:37,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.7s impTime [2018-10-02 12:10:37,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-02 12:10:37,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-02 12:10:37,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-02 12:10:37,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-02 12:10:37,808 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-10-02 12:10:37,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:37,808 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-02 12:10:37,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-02 12:10:37,809 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-02 12:10:37,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-02 12:10:37,809 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:37,809 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-10-02 12:10:37,810 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:37,810 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:37,810 INFO L82 PathProgramCache]: Analyzing trace with hash -826171800, now seen corresponding path program 85 times [2018-10-02 12:10:37,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:37,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:37,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:37,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:37,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:39,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:39,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:10:39,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:10:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:39,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:40,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:40,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-02 12:10:40,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-02 12:10:40,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-02 12:10:40,177 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:40,178 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-10-02 12:10:40,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:40,564 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-10-02 12:10:40,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-02 12:10:40,565 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-10-02 12:10:40,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:40,565 INFO L225 Difference]: With dead ends: 92 [2018-10-02 12:10:40,566 INFO L226 Difference]: Without dead ends: 90 [2018-10-02 12:10:40,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.8s impTime [2018-10-02 12:10:40,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-02 12:10:40,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-02 12:10:40,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-02 12:10:40,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-02 12:10:40,568 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-10-02 12:10:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:40,568 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-02 12:10:40,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-02 12:10:40,568 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-02 12:10:40,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-02 12:10:40,569 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:40,569 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-10-02 12:10:40,569 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:40,569 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:40,570 INFO L82 PathProgramCache]: Analyzing trace with hash 158476001, now seen corresponding path program 86 times [2018-10-02 12:10:40,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:40,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:40,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:40,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:10:40,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:43,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:43,144 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:10:43,151 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:10:43,197 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:10:43,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:43,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:43,377 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:43,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-02 12:10:43,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-02 12:10:43,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-02 12:10:43,378 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:43,378 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-10-02 12:10:43,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:43,747 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-02 12:10:43,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-02 12:10:43,748 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-10-02 12:10:43,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:43,748 INFO L225 Difference]: With dead ends: 93 [2018-10-02 12:10:43,748 INFO L226 Difference]: Without dead ends: 91 [2018-10-02 12:10:43,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.3s impTime [2018-10-02 12:10:43,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-02 12:10:43,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-02 12:10:43,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-02 12:10:43,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-02 12:10:43,750 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-10-02 12:10:43,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:43,751 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-02 12:10:43,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-02 12:10:43,751 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-02 12:10:43,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-02 12:10:43,751 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:43,751 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-10-02 12:10:43,751 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:43,752 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:43,752 INFO L82 PathProgramCache]: Analyzing trace with hash 617786760, now seen corresponding path program 87 times [2018-10-02 12:10:43,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:43,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:43,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:43,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:43,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:46,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:46,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:10:46,320 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:10:46,391 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-02 12:10:46,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:46,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:46,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:46,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-02 12:10:46,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-02 12:10:46,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-02 12:10:46,580 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:46,580 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-10-02 12:10:46,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:46,998 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-02 12:10:46,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-02 12:10:46,998 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-10-02 12:10:46,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:46,999 INFO L225 Difference]: With dead ends: 94 [2018-10-02 12:10:46,999 INFO L226 Difference]: Without dead ends: 92 [2018-10-02 12:10:46,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.3s impTime [2018-10-02 12:10:46,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-02 12:10:47,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-02 12:10:47,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-02 12:10:47,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-02 12:10:47,001 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-10-02 12:10:47,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:47,001 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-02 12:10:47,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-02 12:10:47,001 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-02 12:10:47,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-02 12:10:47,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:47,002 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-10-02 12:10:47,002 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:47,002 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:47,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1971518401, now seen corresponding path program 88 times [2018-10-02 12:10:47,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:47,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:47,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:47,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:47,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:49,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:49,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:10:49,586 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:10:49,633 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:10:49,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:49,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:49,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:49,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-02 12:10:49,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-02 12:10:49,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-02 12:10:49,823 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:49,823 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-10-02 12:10:50,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:50,201 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-02 12:10:50,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-02 12:10:50,201 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-10-02 12:10:50,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:50,202 INFO L225 Difference]: With dead ends: 95 [2018-10-02 12:10:50,202 INFO L226 Difference]: Without dead ends: 93 [2018-10-02 12:10:50,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.3s impTime [2018-10-02 12:10:50,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-02 12:10:50,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-02 12:10:50,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-02 12:10:50,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-02 12:10:50,204 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-10-02 12:10:50,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:50,204 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-02 12:10:50,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-02 12:10:50,204 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-02 12:10:50,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-02 12:10:50,205 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:50,205 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-10-02 12:10:50,205 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:50,205 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:50,205 INFO L82 PathProgramCache]: Analyzing trace with hash 987526312, now seen corresponding path program 89 times [2018-10-02 12:10:50,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:50,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:50,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:50,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:50,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:52,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:52,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:10:52,556 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:10:52,634 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-02 12:10:52,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:52,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:52,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:52,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-02 12:10:52,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-02 12:10:52,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-02 12:10:52,824 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:52,824 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-10-02 12:10:53,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:53,244 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-10-02 12:10:53,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-02 12:10:53,245 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-10-02 12:10:53,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:53,245 INFO L225 Difference]: With dead ends: 96 [2018-10-02 12:10:53,245 INFO L226 Difference]: Without dead ends: 94 [2018-10-02 12:10:53,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.1s impTime [2018-10-02 12:10:53,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-02 12:10:53,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-02 12:10:53,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-02 12:10:53,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-02 12:10:53,247 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-10-02 12:10:53,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:53,248 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-02 12:10:53,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-02 12:10:53,248 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-02 12:10:53,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-02 12:10:53,248 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:53,248 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-10-02 12:10:53,248 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:53,249 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:53,249 INFO L82 PathProgramCache]: Analyzing trace with hash 548542625, now seen corresponding path program 90 times [2018-10-02 12:10:53,249 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:53,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:53,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:53,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:53,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:53,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:55,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:55,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:55,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:10:55,227 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:10:55,306 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-02 12:10:55,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:55,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:55,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:55,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-02 12:10:55,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-02 12:10:55,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-02 12:10:55,505 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:55,505 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-10-02 12:10:56,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:56,025 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-02 12:10:56,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-02 12:10:56,025 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-10-02 12:10:56,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:56,026 INFO L225 Difference]: With dead ends: 97 [2018-10-02 12:10:56,026 INFO L226 Difference]: Without dead ends: 95 [2018-10-02 12:10:56,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.7s impTime [2018-10-02 12:10:56,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-02 12:10:56,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-02 12:10:56,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-02 12:10:56,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-02 12:10:56,029 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-10-02 12:10:56,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:56,029 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-02 12:10:56,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-02 12:10:56,029 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-02 12:10:56,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-02 12:10:56,030 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:56,030 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-10-02 12:10:56,030 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:56,030 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:56,030 INFO L82 PathProgramCache]: Analyzing trace with hash -175049784, now seen corresponding path program 91 times [2018-10-02 12:10:56,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:56,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:56,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:56,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:56,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:00,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:00,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:00,114 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:11:00,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:11:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:00,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:00,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:00,364 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:00,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-02 12:11:00,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-02 12:11:00,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-02 12:11:00,365 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:00,365 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-10-02 12:11:01,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:01,038 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-02 12:11:01,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-02 12:11:01,038 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-10-02 12:11:01,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:01,039 INFO L225 Difference]: With dead ends: 98 [2018-10-02 12:11:01,039 INFO L226 Difference]: Without dead ends: 96 [2018-10-02 12:11:01,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s Time 3.8s impTime [2018-10-02 12:11:01,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-02 12:11:01,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-02 12:11:01,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-02 12:11:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-02 12:11:01,041 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-10-02 12:11:01,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:01,042 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-02 12:11:01,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-02 12:11:01,042 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-02 12:11:01,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-02 12:11:01,042 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:01,042 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-10-02 12:11:01,042 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:01,043 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:01,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1131577983, now seen corresponding path program 92 times [2018-10-02 12:11:01,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:01,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:01,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:01,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:11:01,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:04,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:04,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:11:04,089 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:11:04,134 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:11:04,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:11:04,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:04,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:04,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:04,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-02 12:11:04,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-02 12:11:04,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-02 12:11:04,385 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:04,385 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-10-02 12:11:04,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:04,794 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-02 12:11:04,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-02 12:11:04,795 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-10-02 12:11:04,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:04,795 INFO L225 Difference]: With dead ends: 99 [2018-10-02 12:11:04,795 INFO L226 Difference]: Without dead ends: 97 [2018-10-02 12:11:04,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.8s impTime [2018-10-02 12:11:04,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-02 12:11:04,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-02 12:11:04,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-02 12:11:04,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-02 12:11:04,798 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-10-02 12:11:04,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:04,798 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-02 12:11:04,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-02 12:11:04,798 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-02 12:11:04,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-02 12:11:04,799 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:04,799 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-10-02 12:11:04,799 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:04,799 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:04,799 INFO L82 PathProgramCache]: Analyzing trace with hash -719181080, now seen corresponding path program 93 times [2018-10-02 12:11:04,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:04,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:04,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:04,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:11:04,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:07,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:07,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:11:07,195 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:11:07,332 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-02 12:11:07,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:11:07,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:07,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:07,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-02 12:11:07,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-02 12:11:07,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-02 12:11:07,806 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:07,807 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-10-02 12:11:08,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:08,366 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-02 12:11:08,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-02 12:11:08,367 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-10-02 12:11:08,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:08,367 INFO L225 Difference]: With dead ends: 100 [2018-10-02 12:11:08,367 INFO L226 Difference]: Without dead ends: 98 [2018-10-02 12:11:08,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.1s impTime [2018-10-02 12:11:08,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-02 12:11:08,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-02 12:11:08,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-02 12:11:08,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-02 12:11:08,370 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-10-02 12:11:08,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:08,370 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-02 12:11:08,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-02 12:11:08,370 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-02 12:11:08,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-02 12:11:08,371 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:08,371 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-10-02 12:11:08,371 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:08,371 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:08,371 INFO L82 PathProgramCache]: Analyzing trace with hash -819778975, now seen corresponding path program 94 times [2018-10-02 12:11:08,371 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:08,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:08,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:08,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:11:08,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:11,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:11,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:11,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:11:11,898 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:11:11,946 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:11:11,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:11:11,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:12,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:12,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:12,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-02 12:11:12,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-02 12:11:12,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-02 12:11:12,207 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:12,207 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-10-02 12:11:12,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:12,691 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-02 12:11:12,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-02 12:11:12,691 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-10-02 12:11:12,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:12,692 INFO L225 Difference]: With dead ends: 101 [2018-10-02 12:11:12,692 INFO L226 Difference]: Without dead ends: 99 [2018-10-02 12:11:12,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time 3.2s impTime [2018-10-02 12:11:12,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-02 12:11:12,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-02 12:11:12,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-02 12:11:12,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-02 12:11:12,694 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-10-02 12:11:12,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:12,694 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-02 12:11:12,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-02 12:11:12,695 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-02 12:11:12,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-02 12:11:12,696 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:12,697 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-10-02 12:11:12,697 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:12,697 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:12,697 INFO L82 PathProgramCache]: Analyzing trace with hash 356653576, now seen corresponding path program 95 times [2018-10-02 12:11:12,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:12,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:12,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:12,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:11:12,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:15,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:15,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:15,778 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:11:15,785 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:11:15,872 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-02 12:11:15,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:11:15,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:16,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:16,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-02 12:11:16,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-02 12:11:16,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-02 12:11:16,074 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:16,074 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-10-02 12:11:16,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:16,711 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-10-02 12:11:16,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-02 12:11:16,711 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-10-02 12:11:16,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:16,712 INFO L225 Difference]: With dead ends: 102 [2018-10-02 12:11:16,712 INFO L226 Difference]: Without dead ends: 100 [2018-10-02 12:11:16,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.8s impTime [2018-10-02 12:11:16,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-02 12:11:16,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-02 12:11:16,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-02 12:11:16,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-02 12:11:16,715 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-10-02 12:11:16,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:16,715 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-02 12:11:16,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-02 12:11:16,715 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-02 12:11:16,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-02 12:11:16,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:16,716 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-10-02 12:11:16,716 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:16,716 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:16,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1828643007, now seen corresponding path program 96 times [2018-10-02 12:11:16,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:16,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:16,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:16,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:11:16,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:19,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:19,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:11:19,345 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:11:19,431 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-02 12:11:19,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:11:19,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:19,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:19,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-02 12:11:19,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-02 12:11:19,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-02 12:11:19,635 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:19,636 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-10-02 12:11:20,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:20,128 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-02 12:11:20,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-02 12:11:20,128 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-10-02 12:11:20,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:20,129 INFO L225 Difference]: With dead ends: 103 [2018-10-02 12:11:20,129 INFO L226 Difference]: Without dead ends: 101 [2018-10-02 12:11:20,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.3s impTime [2018-10-02 12:11:20,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-02 12:11:20,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-02 12:11:20,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-02 12:11:20,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-02 12:11:20,132 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-10-02 12:11:20,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:20,132 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-02 12:11:20,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-02 12:11:20,132 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-02 12:11:20,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-02 12:11:20,133 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:20,133 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-10-02 12:11:20,133 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:20,133 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:20,133 INFO L82 PathProgramCache]: Analyzing trace with hash -853360344, now seen corresponding path program 97 times [2018-10-02 12:11:20,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:20,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:20,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:20,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:11:20,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:23,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:23,870 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:11:23,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:11:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:23,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:24,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:24,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-02 12:11:24,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-02 12:11:24,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-02 12:11:24,134 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:24,134 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-10-02 12:11:24,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:24,578 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-10-02 12:11:24,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-02 12:11:24,579 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-10-02 12:11:24,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:24,580 INFO L225 Difference]: With dead ends: 104 [2018-10-02 12:11:24,580 INFO L226 Difference]: Without dead ends: 102 [2018-10-02 12:11:24,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time 3.5s impTime [2018-10-02 12:11:24,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-02 12:11:24,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-02 12:11:24,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-02 12:11:24,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-02 12:11:24,583 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-10-02 12:11:24,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:24,583 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-02 12:11:24,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-02 12:11:24,583 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-02 12:11:24,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-02 12:11:24,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:24,584 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-10-02 12:11:24,584 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:24,584 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:24,584 INFO L82 PathProgramCache]: Analyzing trace with hash -684368863, now seen corresponding path program 98 times [2018-10-02 12:11:24,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:24,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:24,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:24,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:11:24,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:29,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:29,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:11:29,078 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:11:29,128 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:11:29,129 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:11:29,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:29,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:29,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-02 12:11:29,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-02 12:11:29,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-02 12:11:29,340 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:29,340 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-10-02 12:11:30,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:30,089 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-02 12:11:30,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-02 12:11:30,090 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-10-02 12:11:30,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:30,091 INFO L225 Difference]: With dead ends: 105 [2018-10-02 12:11:30,091 INFO L226 Difference]: Without dead ends: 103 [2018-10-02 12:11:30,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s Time 4.2s impTime [2018-10-02 12:11:30,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-02 12:11:30,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-02 12:11:30,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-02 12:11:30,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-02 12:11:30,094 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-10-02 12:11:30,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:30,094 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-02 12:11:30,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-02 12:11:30,095 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-02 12:11:30,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-02 12:11:30,095 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:30,095 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-10-02 12:11:30,095 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:30,095 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:30,096 INFO L82 PathProgramCache]: Analyzing trace with hash 259399752, now seen corresponding path program 99 times [2018-10-02 12:11:30,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:30,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:30,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:30,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:11:30,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:34,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:34,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:34,758 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:11:34,766 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:11:34,855 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-10-02 12:11:34,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:11:34,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:35,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:35,057 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:35,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-02 12:11:35,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-02 12:11:35,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-02 12:11:35,059 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:35,059 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-10-02 12:11:35,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:35,796 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-02 12:11:35,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-02 12:11:35,797 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-10-02 12:11:35,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:35,797 INFO L225 Difference]: With dead ends: 106 [2018-10-02 12:11:35,798 INFO L226 Difference]: Without dead ends: 104 [2018-10-02 12:11:35,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s Time 4.4s impTime [2018-10-02 12:11:35,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-02 12:11:35,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-02 12:11:35,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-02 12:11:35,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-02 12:11:35,800 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-10-02 12:11:35,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:35,801 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-02 12:11:35,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-02 12:11:35,801 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-02 12:11:35,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-02 12:11:35,801 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:35,801 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-10-02 12:11:35,802 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:35,802 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:35,802 INFO L82 PathProgramCache]: Analyzing trace with hash -548544255, now seen corresponding path program 100 times [2018-10-02 12:11:35,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:35,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:35,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:35,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:11:35,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:40,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:40,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:11:40,337 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:11:40,387 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:11:40,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:11:40,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:40,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:40,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-02 12:11:40,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-02 12:11:40,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-02 12:11:40,601 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:40,601 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-10-02 12:11:41,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:41,356 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-02 12:11:41,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-02 12:11:41,357 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-10-02 12:11:41,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:41,358 INFO L225 Difference]: With dead ends: 107 [2018-10-02 12:11:41,358 INFO L226 Difference]: Without dead ends: 105 [2018-10-02 12:11:41,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s Time 4.2s impTime [2018-10-02 12:11:41,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-02 12:11:41,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-02 12:11:41,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-02 12:11:41,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-02 12:11:41,361 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-10-02 12:11:41,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:41,361 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-02 12:11:41,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-02 12:11:41,362 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-02 12:11:41,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-02 12:11:41,362 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:41,362 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-10-02 12:11:41,363 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:41,363 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:41,363 INFO L82 PathProgramCache]: Analyzing trace with hash 174995304, now seen corresponding path program 101 times [2018-10-02 12:11:41,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:41,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:41,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:41,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:11:41,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:46,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:46,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:11:46,230 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:11:46,333 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-10-02 12:11:46,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:11:46,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:46,545 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:46,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-02 12:11:46,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-02 12:11:46,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-02 12:11:46,547 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:46,547 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-10-02 12:11:47,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:47,332 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-10-02 12:11:47,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-02 12:11:47,333 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-10-02 12:11:47,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:47,334 INFO L225 Difference]: With dead ends: 108 [2018-10-02 12:11:47,334 INFO L226 Difference]: Without dead ends: 106 [2018-10-02 12:11:47,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s Time 4.6s impTime [2018-10-02 12:11:47,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-02 12:11:47,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-02 12:11:47,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-02 12:11:47,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-02 12:11:47,337 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-10-02 12:11:47,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:47,337 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-02 12:11:47,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-02 12:11:47,338 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-02 12:11:47,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-02 12:11:47,338 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:47,338 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-10-02 12:11:47,339 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:47,339 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:47,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1129885153, now seen corresponding path program 102 times [2018-10-02 12:11:47,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:47,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:47,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:47,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:11:47,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:52,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:52,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:11:52,116 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:11:52,206 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-10-02 12:11:52,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:11:52,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:52,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:52,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-02 12:11:52,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-02 12:11:52,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-02 12:11:52,422 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:52,422 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-10-02 12:11:53,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:53,208 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-02 12:11:53,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-02 12:11:53,209 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-10-02 12:11:53,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:53,210 INFO L225 Difference]: With dead ends: 109 [2018-10-02 12:11:53,210 INFO L226 Difference]: Without dead ends: 107 [2018-10-02 12:11:53,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s Time 4.4s impTime [2018-10-02 12:11:53,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-02 12:11:53,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-02 12:11:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-02 12:11:53,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-02 12:11:53,214 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-10-02 12:11:53,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:53,214 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-02 12:11:53,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-02 12:11:53,214 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-02 12:11:53,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-02 12:11:53,214 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:53,215 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-10-02 12:11:53,215 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:53,215 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:53,215 INFO L82 PathProgramCache]: Analyzing trace with hash 666699400, now seen corresponding path program 103 times [2018-10-02 12:11:53,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:53,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:53,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:53,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:11:53,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:56,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:56,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:11:56,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:11:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:56,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:56,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:56,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-02 12:11:56,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-02 12:11:56,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-02 12:11:56,660 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:56,660 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-10-02 12:11:57,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:57,152 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-02 12:11:57,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-02 12:11:57,153 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-10-02 12:11:57,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:57,153 INFO L225 Difference]: With dead ends: 110 [2018-10-02 12:11:57,153 INFO L226 Difference]: Without dead ends: 108 [2018-10-02 12:11:57,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s Time 2.8s impTime [2018-10-02 12:11:57,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-02 12:11:57,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-02 12:11:57,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-02 12:11:57,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-02 12:11:57,156 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-10-02 12:11:57,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:57,156 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-02 12:11:57,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-02 12:11:57,157 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-02 12:11:57,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-02 12:11:57,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:57,157 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-10-02 12:11:57,157 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:57,157 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:57,158 INFO L82 PathProgramCache]: Analyzing trace with hash -807157055, now seen corresponding path program 104 times [2018-10-02 12:11:57,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:57,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:57,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:57,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:11:57,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:12:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:12:00,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:12:00,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:12:00,079 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:12:00,131 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:12:00,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:12:00,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:12:00,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:12:00,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:12:00,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-02 12:12:00,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-02 12:12:00,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-02 12:12:00,448 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:12:00,449 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-10-02 12:12:01,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:12:01,044 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-02 12:12:01,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-02 12:12:01,044 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-10-02 12:12:01,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:12:01,044 INFO L225 Difference]: With dead ends: 111 [2018-10-02 12:12:01,044 INFO L226 Difference]: Without dead ends: 109 [2018-10-02 12:12:01,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.6s impTime [2018-10-02 12:12:01,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-02 12:12:01,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-02 12:12:01,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-02 12:12:01,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-02 12:12:01,047 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-10-02 12:12:01,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:12:01,047 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-02 12:12:01,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-02 12:12:01,047 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-02 12:12:01,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-02 12:12:01,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:12:01,047 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-10-02 12:12:01,048 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:12:01,048 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:12:01,048 INFO L82 PathProgramCache]: Analyzing trace with hash 747933096, now seen corresponding path program 105 times [2018-10-02 12:12:01,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:12:01,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:12:01,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:12:01,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:12:01,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:12:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-02 12:12:03,606 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 12:12:03,611 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 12:12:03,611 INFO L202 PluginConnector]: Adding new model overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 12:12:03 BoogieIcfgContainer [2018-10-02 12:12:03,611 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 12:12:03,612 INFO L168 Benchmark]: Toolchain (without parser) took 234881.25 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -105.4 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 382.5 MB). Peak memory consumption was 277.1 MB. Max. memory is 7.1 GB. [2018-10-02 12:12:03,614 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.35 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 12:12:03,614 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 12:12:03,615 INFO L168 Benchmark]: Boogie Preprocessor took 19.57 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 12:12:03,615 INFO L168 Benchmark]: RCFGBuilder took 294.60 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-02 12:12:03,616 INFO L168 Benchmark]: TraceAbstraction took 234520.43 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -105.4 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 361.4 MB). Peak memory consumption was 256.0 MB. Max. memory is 7.1 GB. [2018-10-02 12:12:03,619 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 0.35 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.57 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 294.60 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 234520.43 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -105.4 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 361.4 MB). Peak memory consumption was 256.0 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 analyzing trace of length 109 with TraceHistMax 105, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 107 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 234.4s OverallTime, 106 OverallIterations, 105 TraceHistogramMax, 38.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 315 SDtfs, 0 SDslu, 3969 SDs, 0 SdLazy, 9639 SolverSat, 151 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11338 GetRequests, 5773 SyntacticMatches, 0 SemanticMatches, 5565 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 178.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=105, 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, 105 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 5.2s SatisfiabilityAnalysisTime, 182.6s InterpolantComputationTime, 11547 NumberOfCodeBlocks, 11547 NumberOfCodeBlocksAsserted, 1604 NumberOfCheckSat, 11338 ConstructedInterpolants, 0 QuantifiedInterpolants, 2393152 SizeOfPredicates, 104 NumberOfNonLiveVariables, 23712 ConjunctsInSsa, 5668 ConjunctsInUnsatCore, 209 InterpolantComputations, 1 PerfectInterpolantSequences, 0/385840 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-0-2018-10-02_12-12-03-629.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-0-2018-10-02_12-12-03-629.csv Completed graceful shutdown