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/functions1.i_3.bplTransformedIcfg_BEv2_8.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-00a8621 [2018-09-30 10:46:50,409 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:46:50,411 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:46:50,425 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:46:50,425 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:46:50,426 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:46:50,427 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:46:50,429 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:46:50,431 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:46:50,432 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:46:50,433 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 10:46:50,458 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-30 10:46:50,488 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:46:50,488 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:46:50,489 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:46:50,489 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:46:50,490 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:46:50,490 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:46:50,490 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:46:50,491 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:46:50,491 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:46:50,491 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:46:50,491 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:46:50,491 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:46:50,492 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:46:50,492 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:46:50,492 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:46:50,492 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:46:50,492 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:46:50,493 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:46:50,493 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:46:50,493 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:46:50,493 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:46:50,493 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:46:50,493 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:46:50,494 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:46:50,494 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:46:50,494 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:46:50,494 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:46:50,495 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:46:50,495 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:46:50,495 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:46:50,495 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 10:46:50,546 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:46:50,563 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:46:50,570 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:46:50,571 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:46:50,572 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:46:50,573 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/functions1.i_3.bplTransformedIcfg_BEv2_8.bpl [2018-09-30 10:46:50,573 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/functions1.i_3.bplTransformedIcfg_BEv2_8.bpl' [2018-09-30 10:46:50,628 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:46:50,632 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:46:50,632 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:46:50,633 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:46:50,633 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:46:50,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:46:50" (1/1) ... [2018-09-30 10:46:50,665 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:46:50" (1/1) ... [2018-09-30 10:46:50,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:46:50,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:46:50,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:46:50,674 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:46:50,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:46:50" (1/1) ... [2018-09-30 10:46:50,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:46:50" (1/1) ... [2018-09-30 10:46:50,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:46:50" (1/1) ... [2018-09-30 10:46:50,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:46:50" (1/1) ... [2018-09-30 10:46:50,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:46:50" (1/1) ... [2018-09-30 10:46:50,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:46:50" (1/1) ... [2018-09-30 10:46:50,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:46:50" (1/1) ... [2018-09-30 10:46:50,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:46:50,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:46:50,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:46:50,697 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:46:50,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:46:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:46:50,771 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-30 10:46:50,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 10:46:50,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 10:46:51,017 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 10:46:51,017 INFO L202 PluginConnector]: Adding new model functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:46:51 BoogieIcfgContainer [2018-09-30 10:46:51,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:46:51,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:46:51,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:46:51,023 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:46:51,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:46:50" (1/2) ... [2018-09-30 10:46:51,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7254d1c0 and model type functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:46:51, skipping insertion in model container [2018-09-30 10:46:51,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:46:51" (2/2) ... [2018-09-30 10:46:51,028 INFO L112 eAbstractionObserver]: Analyzing ICFG functions1.i_3.bplTransformedIcfg_BEv2_8.bpl [2018-09-30 10:46:51,039 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:46:51,049 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 10:46:51,113 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:46:51,114 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:46:51,114 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:46:51,114 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:46:51,114 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:46:51,114 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:46:51,115 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:46:51,115 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:46:51,115 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:46:51,131 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 10:46:51,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 10:46:51,148 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:46:51,149 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 10:46:51,152 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:46:51,161 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:46:51,162 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-09-30 10:46:51,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:46:51,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:46:51,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:51,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:46:51,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:46:51,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:51,355 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:46:51,355 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 10:46:51,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:46:51,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:46:51,376 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:46:51,378 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 10:46:51,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:46:51,494 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-30 10:46:51,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:46:51,497 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 10:46:51,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:46:51,510 INFO L225 Difference]: With dead ends: 9 [2018-09-30 10:46:51,510 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 10:46:51,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:46:51,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 10:46:51,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 10:46:51,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 10:46:51,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 10:46:51,553 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 10:46:51,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:46:51,553 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 10:46:51,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:46:51,554 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 10:46:51,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 10:46:51,554 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:46:51,554 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 10:46:51,555 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:46:51,555 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:46:51,555 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2018-09-30 10:46:51,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:46:51,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:46:51,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:51,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:46:51,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:46:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:51,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:46:51,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:46:51,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:46:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:46:51,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:46:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:51,815 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:46:51,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 10:46:51,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 10:46:51,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 10:46:51,817 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:46:51,817 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-30 10:46:52,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:46:52,134 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-30 10:46:52,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:46:52,134 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-30 10:46:52,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:46:52,135 INFO L225 Difference]: With dead ends: 8 [2018-09-30 10:46:52,135 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 10:46:52,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:46:52,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 10:46:52,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 10:46:52,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 10:46:52,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 10:46:52,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 10:46:52,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:46:52,139 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 10:46:52,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 10:46:52,139 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 10:46:52,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 10:46:52,140 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:46:52,140 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-30 10:46:52,140 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:46:52,140 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:46:52,140 INFO L82 PathProgramCache]: Analyzing trace with hash 28844579, now seen corresponding path program 2 times [2018-09-30 10:46:52,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:46:52,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:46:52,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:52,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:46:52,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:52,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:46:52,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:52,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:46:52,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:46:52,253 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:46:52,272 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:46:52,273 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:46:52,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:46:52,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:52,364 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:46:52,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 10:46:52,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:46:52,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:46:52,366 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:46:52,366 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-30 10:46:52,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:46:52,483 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 10:46:52,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:46:52,486 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-30 10:46:52,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:46:52,486 INFO L225 Difference]: With dead ends: 9 [2018-09-30 10:46:52,487 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 10:46:52,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:46:52,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 10:46:52,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 10:46:52,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 10:46:52,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 10:46:52,491 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 10:46:52,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:46:52,491 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 10:46:52,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:46:52,492 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 10:46:52,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 10:46:52,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:46:52,492 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-30 10:46:52,494 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:46:52,494 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:46:52,494 INFO L82 PathProgramCache]: Analyzing trace with hash 894183756, now seen corresponding path program 3 times [2018-09-30 10:46:52,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:46:52,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:46:52,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:52,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:46:52,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:52,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:46:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:52,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:46:52,743 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:46:52,751 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:46:52,789 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 10:46:52,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:46:52,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:46:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:52,857 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:46:52,857 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:46:52,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:46:52,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:46:52,858 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:46:52,858 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-30 10:46:52,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:46:52,992 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 10:46:52,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:46:52,993 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-30 10:46:52,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:46:52,993 INFO L225 Difference]: With dead ends: 10 [2018-09-30 10:46:52,994 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 10:46:52,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:46:52,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 10:46:52,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 10:46:52,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 10:46:52,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 10:46:52,997 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-30 10:46:52,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:46:52,998 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 10:46:52,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:46:52,998 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 10:46:52,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:46:52,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:46:52,999 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-30 10:46:52,999 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:46:52,999 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:46:52,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1949894467, now seen corresponding path program 4 times [2018-09-30 10:46:52,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:46:52,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:46:53,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:53,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:46:53,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:46:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:53,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:46:53,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:46:53,201 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:46:53,213 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:46:53,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:46:53,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:46:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:53,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:46:53,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:46:53,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:46:53,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:46:53,313 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:46:53,313 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-30 10:46:53,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:46:53,391 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 10:46:53,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:46:53,392 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-30 10:46:53,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:46:53,393 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:46:53,393 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 10:46:53,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:46:53,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 10:46:53,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 10:46:53,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 10:46:53,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 10:46:53,397 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-30 10:46:53,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:46:53,397 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 10:46:53,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:46:53,397 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 10:46:53,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 10:46:53,398 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:46:53,398 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-30 10:46:53,398 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:46:53,398 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:46:53,399 INFO L82 PathProgramCache]: Analyzing trace with hash 317188140, now seen corresponding path program 5 times [2018-09-30 10:46:53,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:46:53,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:46:53,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:53,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:46:53,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:46:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:53,499 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:46:53,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:46:53,511 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:46:53,526 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 10:46:53,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:46:53,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:46:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:53,678 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:46:53,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:46:53,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:46:53,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:46:53,679 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:46:53,679 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-30 10:46:54,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:46:54,144 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 10:46:54,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:46:54,145 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-30 10:46:54,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:46:54,145 INFO L225 Difference]: With dead ends: 12 [2018-09-30 10:46:54,146 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 10:46:54,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:46:54,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 10:46:54,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 10:46:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 10:46:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 10:46:54,149 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-30 10:46:54,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:46:54,149 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 10:46:54,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:46:54,150 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 10:46:54,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:46:54,150 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:46:54,150 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-30 10:46:54,151 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:46:54,151 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:46:54,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1242899555, now seen corresponding path program 6 times [2018-09-30 10:46:54,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:46:54,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:46:54,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:54,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:46:54,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:54,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:46:54,312 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:54,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:46:54,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:46:54,322 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:46:54,338 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 10:46:54,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:46:54,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:46:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:54,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:46:54,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:46:54,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:46:54,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:46:54,441 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:46:54,441 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-30 10:46:54,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:46:54,546 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 10:46:54,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:46:54,547 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-30 10:46:54,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:46:54,548 INFO L225 Difference]: With dead ends: 13 [2018-09-30 10:46:54,548 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 10:46:54,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:46:54,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 10:46:54,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 10:46:54,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 10:46:54,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 10:46:54,551 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-30 10:46:54,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:46:54,552 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 10:46:54,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:46:54,552 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 10:46:54,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:46:54,553 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:46:54,553 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-30 10:46:54,553 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:46:54,553 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:46:54,554 INFO L82 PathProgramCache]: Analyzing trace with hash -124817652, now seen corresponding path program 7 times [2018-09-30 10:46:54,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:46:54,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:46:54,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:54,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:46:54,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:46:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:54,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:46:54,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:46:54,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:46:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:46:54,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:46:54,829 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:54,850 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:46:54,850 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:46:54,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:46:54,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:46:54,851 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:46:54,851 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-30 10:46:54,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:46:54,962 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 10:46:54,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:46:54,963 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-30 10:46:54,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:46:54,964 INFO L225 Difference]: With dead ends: 14 [2018-09-30 10:46:54,964 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 10:46:54,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:46:54,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 10:46:54,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 10:46:54,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 10:46:54,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 10:46:54,969 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-30 10:46:54,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:46:54,969 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 10:46:54,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:46:54,969 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 10:46:54,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:46:54,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:46:54,970 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-30 10:46:54,970 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:46:54,970 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:46:54,971 INFO L82 PathProgramCache]: Analyzing trace with hash 425621891, now seen corresponding path program 8 times [2018-09-30 10:46:54,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:46:54,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:46:54,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:54,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:46:54,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:46:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:55,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:46:55,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:46:55,162 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:46:55,197 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:46:55,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:46:55,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:46:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:55,295 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:46:55,295 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:46:55,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:46:55,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:46:55,296 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:46:55,296 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-30 10:46:55,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:46:55,442 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 10:46:55,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:46:55,445 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-30 10:46:55,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:46:55,446 INFO L225 Difference]: With dead ends: 15 [2018-09-30 10:46:55,446 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 10:46:55,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:46:55,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 10:46:55,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 10:46:55,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 10:46:55,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 10:46:55,449 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-30 10:46:55,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:46:55,449 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 10:46:55,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:46:55,450 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 10:46:55,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 10:46:55,450 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:46:55,450 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-30 10:46:55,451 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:46:55,451 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:46:55,451 INFO L82 PathProgramCache]: Analyzing trace with hash 309378540, now seen corresponding path program 9 times [2018-09-30 10:46:55,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:46:55,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:46:55,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:55,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:46:55,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:55,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:46:55,609 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:55,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:46:55,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:46:55,617 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:46:55,653 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 10:46:55,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:46:55,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:46:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:55,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:46:55,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 10:46:55,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:46:55,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:46:55,831 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:46:55,831 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-30 10:46:55,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:46:55,920 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 10:46:55,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 10:46:55,920 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-30 10:46:55,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:46:55,921 INFO L225 Difference]: With dead ends: 16 [2018-09-30 10:46:55,922 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 10:46:55,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:46:55,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 10:46:55,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 10:46:55,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:46:55,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 10:46:55,925 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-30 10:46:55,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:46:55,926 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 10:46:55,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:46:55,926 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 10:46:55,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:46:55,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:46:55,927 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-30 10:46:55,927 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:46:55,927 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:46:55,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1000801955, now seen corresponding path program 10 times [2018-09-30 10:46:55,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:46:55,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:46:55,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:55,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:46:55,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:55,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:46:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:56,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:46:56,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:46:56,050 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:46:56,093 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:46:56,094 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:46:56,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:46:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:56,189 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:46:56,189 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 10:46:56,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:46:56,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:46:56,190 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:46:56,190 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-30 10:46:56,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:46:56,307 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 10:46:56,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:46:56,308 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-30 10:46:56,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:46:56,309 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:46:56,309 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 10:46:56,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:46:56,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 10:46:56,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 10:46:56,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 10:46:56,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 10:46:56,312 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-30 10:46:56,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:46:56,313 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 10:46:56,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:46:56,313 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 10:46:56,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:46:56,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:46:56,314 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-30 10:46:56,314 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:46:56,314 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:46:56,314 INFO L82 PathProgramCache]: Analyzing trace with hash 960091340, now seen corresponding path program 11 times [2018-09-30 10:46:56,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:46:56,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:46:56,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:56,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:46:56,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:46:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:56,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:46:56,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:46:56,492 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:46:56,518 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:46:56,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:46:56,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:46:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:56,737 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:46:56,738 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 10:46:56,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:46:56,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:46:56,740 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:46:56,740 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-30 10:46:56,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:46:56,858 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 10:46:56,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 10:46:56,859 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 10:46:56,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:46:56,860 INFO L225 Difference]: With dead ends: 18 [2018-09-30 10:46:56,860 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 10:46:56,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:46:56,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 10:46:56,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 10:46:56,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:46:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 10:46:56,864 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-30 10:46:56,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:46:56,865 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 10:46:56,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:46:56,865 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 10:46:56,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:46:56,865 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:46:56,865 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-30 10:46:56,866 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:46:56,866 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:46:56,866 INFO L82 PathProgramCache]: Analyzing trace with hash -301937725, now seen corresponding path program 12 times [2018-09-30 10:46:56,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:46:56,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:46:56,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:56,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:46:56,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:46:56,978 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:56,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:46:56,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:46:56,986 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:46:57,045 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:46:57,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:46:57,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:46:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:57,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:46:57,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 10:46:57,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:46:57,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:46:57,210 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:46:57,210 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-30 10:46:57,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:46:57,411 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 10:46:57,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 10:46:57,412 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-30 10:46:57,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:46:57,413 INFO L225 Difference]: With dead ends: 19 [2018-09-30 10:46:57,413 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 10:46:57,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:46:57,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 10:46:57,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 10:46:57,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 10:46:57,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 10:46:57,418 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-30 10:46:57,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:46:57,419 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 10:46:57,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:46:57,419 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 10:46:57,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 10:46:57,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:46:57,420 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-30 10:46:57,420 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:46:57,420 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:46:57,420 INFO L82 PathProgramCache]: Analyzing trace with hash -770133076, now seen corresponding path program 13 times [2018-09-30 10:46:57,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:46:57,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:46:57,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:57,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:46:57,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:57,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:46:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:57,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:46:57,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:46:57,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:46:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:46:57,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:46:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:58,000 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:46:58,001 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 10:46:58,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:46:58,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:46:58,001 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:46:58,002 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-30 10:46:58,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:46:58,313 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 10:46:58,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 10:46:58,314 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-30 10:46:58,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:46:58,314 INFO L225 Difference]: With dead ends: 20 [2018-09-30 10:46:58,314 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 10:46:58,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:46:58,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 10:46:58,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 10:46:58,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:46:58,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 10:46:58,317 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-30 10:46:58,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:46:58,317 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 10:46:58,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:46:58,318 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 10:46:58,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:46:58,318 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:46:58,318 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-30 10:46:58,318 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:46:58,318 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:46:58,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1895680227, now seen corresponding path program 14 times [2018-09-30 10:46:58,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:46:58,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:46:58,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:58,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:46:58,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:46:58,493 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:58,494 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:46:58,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:46:58,504 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:46:58,551 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:46:58,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:46:58,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:46:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:58,685 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:46:58,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 10:46:58,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:46:58,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:46:58,686 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:46:58,686 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-30 10:46:58,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:46:58,843 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 10:46:58,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:46:58,843 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-30 10:46:58,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:46:58,844 INFO L225 Difference]: With dead ends: 21 [2018-09-30 10:46:58,845 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 10:46:58,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:46:58,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 10:46:58,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 10:46:58,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 10:46:58,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 10:46:58,849 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-30 10:46:58,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:46:58,849 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 10:46:58,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:46:58,850 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 10:46:58,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:46:58,850 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:46:58,850 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-30 10:46:58,850 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:46:58,851 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:46:58,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1363453300, now seen corresponding path program 15 times [2018-09-30 10:46:58,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:46:58,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:46:58,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:58,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:46:58,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:46:59,302 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:59,302 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:46:59,302 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:46:59,312 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:46:59,353 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:46:59,353 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:46:59,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:46:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:46:59,713 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:46:59,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 10:46:59,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:46:59,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:46:59,714 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:46:59,715 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-30 10:46:59,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:46:59,887 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 10:46:59,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:46:59,887 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-30 10:46:59,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:46:59,888 INFO L225 Difference]: With dead ends: 22 [2018-09-30 10:46:59,889 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 10:46:59,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:46:59,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 10:46:59,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 10:46:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:46:59,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 10:46:59,892 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-30 10:46:59,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:46:59,893 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 10:46:59,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:46:59,893 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 10:46:59,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:46:59,894 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:46:59,894 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-30 10:46:59,894 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:46:59,894 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:46:59,894 INFO L82 PathProgramCache]: Analyzing trace with hash 682622467, now seen corresponding path program 16 times [2018-09-30 10:46:59,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:46:59,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:46:59,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:59,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:46:59,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:46:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:00,203 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:00,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:00,204 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:00,214 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:47:00,253 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:47:00,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:00,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:00,451 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:00,451 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 10:47:00,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 10:47:00,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 10:47:00,452 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:00,452 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-30 10:47:00,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:00,653 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 10:47:00,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 10:47:00,656 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-30 10:47:00,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:00,656 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:47:00,656 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 10:47:00,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:00,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 10:47:00,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 10:47:00,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 10:47:00,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 10:47:00,660 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-30 10:47:00,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:00,660 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 10:47:00,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 10:47:00,660 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 10:47:00,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 10:47:00,661 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:00,661 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-30 10:47:00,661 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:00,661 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:00,661 INFO L82 PathProgramCache]: Analyzing trace with hash -313538196, now seen corresponding path program 17 times [2018-09-30 10:47:00,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:00,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:00,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:00,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:00,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:01,025 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:01,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:01,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:01,035 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:47:01,107 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 10:47:01,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:01,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:01,222 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:01,222 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 10:47:01,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:47:01,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:47:01,223 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:01,223 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-30 10:47:01,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:01,356 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 10:47:01,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 10:47:01,357 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-30 10:47:01,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:01,358 INFO L225 Difference]: With dead ends: 24 [2018-09-30 10:47:01,358 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 10:47:01,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:01,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 10:47:01,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 10:47:01,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:47:01,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 10:47:01,363 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-30 10:47:01,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:01,363 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 10:47:01,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:47:01,364 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 10:47:01,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:47:01,364 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:01,365 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-30 10:47:01,365 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:01,365 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:01,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1129747677, now seen corresponding path program 18 times [2018-09-30 10:47:01,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:01,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:01,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:01,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:01,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:01,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:01,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:01,567 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:47:01,593 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 10:47:01,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:01,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:01,866 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:01,904 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:01,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 10:47:01,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 10:47:01,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 10:47:01,905 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:01,905 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-30 10:47:03,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:03,036 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 10:47:03,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:47:03,036 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-30 10:47:03,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:03,037 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:47:03,038 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:47:03,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:03,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:47:03,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 10:47:03,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 10:47:03,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 10:47:03,042 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-30 10:47:03,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:03,042 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 10:47:03,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 10:47:03,043 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 10:47:03,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 10:47:03,043 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:03,043 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-30 10:47:03,044 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:03,044 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:03,044 INFO L82 PathProgramCache]: Analyzing trace with hash -662437812, now seen corresponding path program 19 times [2018-09-30 10:47:03,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:03,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:03,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:03,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:03,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:03,186 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:03,186 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:03,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:03,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:03,428 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:03,428 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 10:47:03,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:47:03,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:47:03,431 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:03,431 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-30 10:47:03,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:03,744 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 10:47:03,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 10:47:03,746 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-30 10:47:03,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:03,747 INFO L225 Difference]: With dead ends: 26 [2018-09-30 10:47:03,747 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 10:47:03,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:03,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 10:47:03,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 10:47:03,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:47:03,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 10:47:03,750 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-30 10:47:03,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:03,751 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 10:47:03,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:47:03,751 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 10:47:03,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 10:47:03,752 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:03,752 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-30 10:47:03,752 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:03,752 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:03,752 INFO L82 PathProgramCache]: Analyzing trace with hash 939266115, now seen corresponding path program 20 times [2018-09-30 10:47:03,753 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:03,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:03,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:03,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:03,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:04,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:04,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:04,028 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:47:04,059 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:47:04,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:04,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:04,174 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:04,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 10:47:04,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 10:47:04,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 10:47:04,175 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:04,176 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-30 10:47:04,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:04,352 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 10:47:04,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:47:04,352 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-30 10:47:04,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:04,353 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:47:04,353 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:47:04,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:04,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:47:04,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 10:47:04,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 10:47:04,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 10:47:04,357 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-30 10:47:04,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:04,357 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 10:47:04,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 10:47:04,357 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 10:47:04,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 10:47:04,358 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:04,358 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-30 10:47:04,359 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:04,359 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:04,359 INFO L82 PathProgramCache]: Analyzing trace with hash -947519700, now seen corresponding path program 21 times [2018-09-30 10:47:04,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:04,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:04,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:04,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:04,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:04,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:04,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:04,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:04,778 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:47:04,819 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 10:47:04,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:04,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:05,571 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:05,609 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:05,610 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 10:47:05,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 10:47:05,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 10:47:05,610 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:05,611 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-30 10:47:06,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:06,261 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 10:47:06,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:47:06,263 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-30 10:47:06,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:06,264 INFO L225 Difference]: With dead ends: 28 [2018-09-30 10:47:06,264 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 10:47:06,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:06,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 10:47:06,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 10:47:06,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:47:06,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 10:47:06,268 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-30 10:47:06,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:06,268 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 10:47:06,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 10:47:06,269 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 10:47:06,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 10:47:06,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:06,270 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-30 10:47:06,270 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:06,270 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:06,270 INFO L82 PathProgramCache]: Analyzing trace with hash 691662179, now seen corresponding path program 22 times [2018-09-30 10:47:06,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:06,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:06,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:06,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:06,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:06,814 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:06,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:06,825 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:47:06,861 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:47:06,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:06,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:07,014 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:07,015 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 10:47:07,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 10:47:07,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 10:47:07,016 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:07,016 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-30 10:47:07,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:07,367 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 10:47:07,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:47:07,367 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-30 10:47:07,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:07,368 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:47:07,368 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:47:07,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:07,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:47:07,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 10:47:07,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 10:47:07,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 10:47:07,371 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-30 10:47:07,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:07,372 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 10:47:07,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 10:47:07,372 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 10:47:07,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 10:47:07,373 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:07,373 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-30 10:47:07,373 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:07,373 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:07,373 INFO L82 PathProgramCache]: Analyzing trace with hash -33307124, now seen corresponding path program 23 times [2018-09-30 10:47:07,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:07,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:07,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:07,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:07,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:07,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:07,621 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:07,628 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:47:07,666 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 10:47:07,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:07,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:08,144 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:08,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 10:47:08,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 10:47:08,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 10:47:08,144 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:08,145 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-30 10:47:08,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:08,452 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 10:47:08,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 10:47:08,454 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-30 10:47:08,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:08,454 INFO L225 Difference]: With dead ends: 30 [2018-09-30 10:47:08,454 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 10:47:08,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:08,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 10:47:08,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 10:47:08,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:47:08,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 10:47:08,458 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-30 10:47:08,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:08,459 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 10:47:08,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 10:47:08,459 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 10:47:08,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 10:47:08,459 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:08,460 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-30 10:47:08,460 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:08,460 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:08,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1032519037, now seen corresponding path program 24 times [2018-09-30 10:47:08,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:08,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:08,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:08,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:08,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:08,673 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:08,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:08,674 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:08,683 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:47:08,721 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 10:47:08,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:08,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:08,819 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:08,839 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:08,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 10:47:08,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 10:47:08,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 10:47:08,840 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:08,840 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-30 10:47:09,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:09,011 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 10:47:09,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:47:09,012 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-30 10:47:09,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:09,012 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:47:09,012 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:47:09,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:09,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:47:09,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 10:47:09,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 10:47:09,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 10:47:09,016 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-30 10:47:09,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:09,016 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 10:47:09,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 10:47:09,017 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 10:47:09,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 10:47:09,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:09,017 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-30 10:47:09,018 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:09,018 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:09,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1943317268, now seen corresponding path program 25 times [2018-09-30 10:47:09,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:09,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:09,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:09,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:09,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:09,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:09,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:09,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:09,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:09,379 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:09,379 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 10:47:09,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 10:47:09,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 10:47:09,379 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:09,380 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-30 10:47:09,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:09,565 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 10:47:09,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 10:47:09,565 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-30 10:47:09,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:09,566 INFO L225 Difference]: With dead ends: 32 [2018-09-30 10:47:09,566 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 10:47:09,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:09,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 10:47:09,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 10:47:09,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:47:09,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 10:47:09,569 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-30 10:47:09,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:09,569 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 10:47:09,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 10:47:09,569 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 10:47:09,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 10:47:09,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:09,570 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-30 10:47:09,570 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:09,570 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:09,571 INFO L82 PathProgramCache]: Analyzing trace with hash -113291357, now seen corresponding path program 26 times [2018-09-30 10:47:09,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:09,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:09,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:09,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:09,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:10,580 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:10,580 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:10,588 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:47:10,635 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:47:10,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:10,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:10,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:10,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 10:47:10,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 10:47:10,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 10:47:10,788 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:10,788 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-30 10:47:11,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:11,025 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 10:47:11,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:47:11,025 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-30 10:47:11,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:11,026 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:47:11,026 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:47:11,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:11,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:47:11,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 10:47:11,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 10:47:11,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 10:47:11,029 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-30 10:47:11,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:11,029 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 10:47:11,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 10:47:11,029 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 10:47:11,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 10:47:11,030 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:11,030 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-30 10:47:11,030 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:11,030 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:11,030 INFO L82 PathProgramCache]: Analyzing trace with hash 782937036, now seen corresponding path program 27 times [2018-09-30 10:47:11,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:11,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:11,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:11,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:11,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:11,945 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:11,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:11,953 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:47:12,000 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 10:47:12,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:12,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:12,134 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:12,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 10:47:12,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 10:47:12,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 10:47:12,135 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:12,136 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-30 10:47:12,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:12,555 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 10:47:12,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 10:47:12,555 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-30 10:47:12,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:12,556 INFO L225 Difference]: With dead ends: 34 [2018-09-30 10:47:12,556 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 10:47:12,557 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:12,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 10:47:12,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 10:47:12,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:47:12,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 10:47:12,563 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-30 10:47:12,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:12,563 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 10:47:12,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 10:47:12,563 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 10:47:12,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 10:47:12,563 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:12,563 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-30 10:47:12,564 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:12,564 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:12,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1498753853, now seen corresponding path program 28 times [2018-09-30 10:47:12,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:12,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:12,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:12,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:12,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:13,098 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:13,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:13,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:13,113 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:47:13,153 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:47:13,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:13,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:13,276 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:13,297 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:13,297 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 10:47:13,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 10:47:13,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 10:47:13,298 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:13,298 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-30 10:47:13,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:13,489 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 10:47:13,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:47:13,490 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-30 10:47:13,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:13,490 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:47:13,490 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:47:13,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:13,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:47:13,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 10:47:13,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 10:47:13,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 10:47:13,494 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-30 10:47:13,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:13,494 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 10:47:13,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 10:47:13,495 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 10:47:13,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 10:47:13,496 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:13,496 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-30 10:47:13,497 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:13,497 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:13,497 INFO L82 PathProgramCache]: Analyzing trace with hash 783272620, now seen corresponding path program 29 times [2018-09-30 10:47:13,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:13,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:13,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:13,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:13,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:13,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:13,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:13,821 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:47:13,877 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 10:47:13,877 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:13,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:14,021 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:14,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 10:47:14,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 10:47:14,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 10:47:14,022 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:14,023 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-30 10:47:14,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:14,182 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-30 10:47:14,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:47:14,183 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-30 10:47:14,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:14,183 INFO L225 Difference]: With dead ends: 36 [2018-09-30 10:47:14,183 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 10:47:14,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:14,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 10:47:14,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 10:47:14,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:47:14,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 10:47:14,188 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-30 10:47:14,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:14,189 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 10:47:14,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 10:47:14,189 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 10:47:14,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 10:47:14,189 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:14,189 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-30 10:47:14,189 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:14,190 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:14,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1488350749, now seen corresponding path program 30 times [2018-09-30 10:47:14,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:14,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:14,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:14,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:14,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:14,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:14,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:14,584 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:47:14,641 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 10:47:14,642 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:14,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:14,783 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:14,783 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 10:47:14,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 10:47:14,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 10:47:14,784 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:14,784 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-30 10:47:15,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:15,045 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 10:47:15,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 10:47:15,046 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-30 10:47:15,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:15,047 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:47:15,047 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:47:15,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:15,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:47:15,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 10:47:15,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 10:47:15,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 10:47:15,050 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-30 10:47:15,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:15,050 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 10:47:15,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 10:47:15,050 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 10:47:15,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 10:47:15,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:15,051 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-30 10:47:15,051 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:15,051 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:15,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1105768844, now seen corresponding path program 31 times [2018-09-30 10:47:15,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:15,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:15,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:15,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:15,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:15,351 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:15,351 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:15,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:15,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:15,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:15,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 10:47:15,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 10:47:15,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 10:47:15,530 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:15,530 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-30 10:47:15,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:15,790 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-30 10:47:15,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 10:47:15,791 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-30 10:47:15,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:15,791 INFO L225 Difference]: With dead ends: 38 [2018-09-30 10:47:15,792 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 10:47:15,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:15,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 10:47:15,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 10:47:15,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 10:47:15,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 10:47:15,795 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-30 10:47:15,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:15,796 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 10:47:15,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 10:47:15,796 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 10:47:15,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 10:47:15,796 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:15,796 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-30 10:47:15,797 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:15,797 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:15,797 INFO L82 PathProgramCache]: Analyzing trace with hash -80902397, now seen corresponding path program 32 times [2018-09-30 10:47:15,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:15,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:15,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:15,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:15,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:16,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:16,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:16,411 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:47:16,454 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:47:16,455 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:16,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:16,791 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:16,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 10:47:16,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 10:47:16,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 10:47:16,792 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:16,792 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-30 10:47:17,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:17,026 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 10:47:17,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:47:17,027 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-30 10:47:17,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:17,027 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:47:17,027 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:47:17,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:17,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:47:17,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 10:47:17,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 10:47:17,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 10:47:17,030 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-30 10:47:17,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:17,030 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 10:47:17,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 10:47:17,030 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 10:47:17,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 10:47:17,031 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:17,031 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-30 10:47:17,031 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:17,031 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:17,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1786994796, now seen corresponding path program 33 times [2018-09-30 10:47:17,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:17,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:17,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:17,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:17,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:17,276 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:17,276 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:17,285 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:47:17,345 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 10:47:17,346 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:17,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:17,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:17,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 10:47:17,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 10:47:17,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 10:47:17,477 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:17,477 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-30 10:47:17,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:17,621 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-30 10:47:17,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 10:47:17,621 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-30 10:47:17,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:17,622 INFO L225 Difference]: With dead ends: 40 [2018-09-30 10:47:17,622 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 10:47:17,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:17,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 10:47:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 10:47:17,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 10:47:17,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 10:47:17,625 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-30 10:47:17,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:17,625 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 10:47:17,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 10:47:17,625 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 10:47:17,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 10:47:17,626 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:17,626 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-30 10:47:17,626 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:17,626 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:17,626 INFO L82 PathProgramCache]: Analyzing trace with hash -437734365, now seen corresponding path program 34 times [2018-09-30 10:47:17,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:17,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:17,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:17,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:17,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:17,858 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:17,858 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:17,865 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:47:17,915 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:47:17,915 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:17,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:18,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:18,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 10:47:18,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 10:47:18,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 10:47:18,230 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:18,230 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-30 10:47:18,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:18,465 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 10:47:18,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 10:47:18,466 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-30 10:47:18,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:18,466 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:47:18,467 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:47:18,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:18,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:47:18,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 10:47:18,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 10:47:18,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 10:47:18,473 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-30 10:47:18,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:18,474 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 10:47:18,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 10:47:18,474 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 10:47:18,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 10:47:18,474 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:18,475 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-30 10:47:18,475 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:18,475 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:18,475 INFO L82 PathProgramCache]: Analyzing trace with hash -684861620, now seen corresponding path program 35 times [2018-09-30 10:47:18,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:18,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:18,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:18,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:18,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:18,863 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:18,863 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:18,873 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:47:18,942 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 10:47:18,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:18,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:19,072 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:19,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:19,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 10:47:19,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 10:47:19,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 10:47:19,093 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:19,094 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-30 10:47:19,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:19,364 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-30 10:47:19,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 10:47:19,364 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-30 10:47:19,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:19,365 INFO L225 Difference]: With dead ends: 42 [2018-09-30 10:47:19,365 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 10:47:19,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:19,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 10:47:19,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 10:47:19,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 10:47:19,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 10:47:19,367 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-30 10:47:19,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:19,367 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 10:47:19,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 10:47:19,368 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 10:47:19,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 10:47:19,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:19,368 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-30 10:47:19,369 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:19,369 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:19,369 INFO L82 PathProgramCache]: Analyzing trace with hash 244128067, now seen corresponding path program 36 times [2018-09-30 10:47:19,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:19,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:19,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:19,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:19,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:20,558 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:20,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:20,565 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:47:20,645 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 10:47:20,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:20,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:20,865 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:20,865 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 10:47:20,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 10:47:20,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 10:47:20,866 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:20,866 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-30 10:47:21,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:21,149 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 10:47:21,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:47:21,149 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-30 10:47:21,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:21,150 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:47:21,150 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:47:21,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:21,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:47:21,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 10:47:21,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 10:47:21,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 10:47:21,152 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-30 10:47:21,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:21,152 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 10:47:21,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 10:47:21,153 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 10:47:21,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 10:47:21,153 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:21,153 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-30 10:47:21,154 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:21,154 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:21,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1021962708, now seen corresponding path program 37 times [2018-09-30 10:47:21,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:21,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:21,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:21,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:21,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:21,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:22,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:22,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:22,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:22,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:22,914 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:22,914 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 10:47:22,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 10:47:22,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 10:47:22,915 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:22,915 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-30 10:47:23,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:23,185 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-30 10:47:23,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 10:47:23,185 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-30 10:47:23,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:23,186 INFO L225 Difference]: With dead ends: 44 [2018-09-30 10:47:23,186 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 10:47:23,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:23,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 10:47:23,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 10:47:23,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 10:47:23,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 10:47:23,188 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-30 10:47:23,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:23,188 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 10:47:23,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 10:47:23,188 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 10:47:23,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 10:47:23,189 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:23,189 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-30 10:47:23,189 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:23,189 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:23,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1616071069, now seen corresponding path program 38 times [2018-09-30 10:47:23,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:23,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:23,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:23,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:23,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:23,502 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:23,503 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:23,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:23,512 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:47:23,567 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:47:23,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:23,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:24,005 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:24,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:24,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 10:47:24,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 10:47:24,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 10:47:24,026 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:24,026 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-30 10:47:24,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:24,308 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 10:47:24,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 10:47:24,309 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-30 10:47:24,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:24,310 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:47:24,310 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:47:24,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:24,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:47:24,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 10:47:24,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 10:47:24,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 10:47:24,314 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-30 10:47:24,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:24,314 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 10:47:24,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 10:47:24,315 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 10:47:24,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 10:47:24,316 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:24,316 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-30 10:47:24,316 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:24,316 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:24,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1441406220, now seen corresponding path program 39 times [2018-09-30 10:47:24,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:24,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:24,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:24,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:24,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:24,760 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:24,761 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:24,761 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:24,768 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:47:24,839 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 10:47:24,839 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:24,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:25,041 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:25,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 10:47:25,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 10:47:25,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 10:47:25,042 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:25,042 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-30 10:47:25,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:25,276 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-30 10:47:25,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 10:47:25,276 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-30 10:47:25,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:25,277 INFO L225 Difference]: With dead ends: 46 [2018-09-30 10:47:25,277 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 10:47:25,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:25,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 10:47:25,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 10:47:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 10:47:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 10:47:25,279 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-30 10:47:25,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:25,279 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 10:47:25,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 10:47:25,279 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 10:47:25,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 10:47:25,279 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:25,279 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-30 10:47:25,280 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:25,280 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:25,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1733921667, now seen corresponding path program 40 times [2018-09-30 10:47:25,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:25,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:25,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:25,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:25,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:25,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:25,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:25,993 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:47:26,051 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:47:26,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:26,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:26,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:26,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 10:47:26,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 10:47:26,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 10:47:26,179 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:26,179 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-30 10:47:26,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:26,548 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 10:47:26,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 10:47:26,548 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-30 10:47:26,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:26,549 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:47:26,549 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:47:26,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:26,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:47:26,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 10:47:26,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 10:47:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 10:47:26,551 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-30 10:47:26,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:26,551 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 10:47:26,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 10:47:26,551 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 10:47:26,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 10:47:26,552 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:26,552 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-30 10:47:26,552 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:26,552 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:26,552 INFO L82 PathProgramCache]: Analyzing trace with hash -2083001364, now seen corresponding path program 41 times [2018-09-30 10:47:26,552 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:26,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:26,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:26,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:26,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:26,791 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:26,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:26,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:26,799 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:47:26,882 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 10:47:26,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:26,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:27,081 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:27,081 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 10:47:27,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 10:47:27,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 10:47:27,082 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:27,082 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-30 10:47:27,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:27,439 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-30 10:47:27,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 10:47:27,439 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-30 10:47:27,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:27,440 INFO L225 Difference]: With dead ends: 48 [2018-09-30 10:47:27,440 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 10:47:27,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:27,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 10:47:27,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 10:47:27,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 10:47:27,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 10:47:27,442 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-30 10:47:27,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:27,442 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 10:47:27,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 10:47:27,442 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 10:47:27,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 10:47:27,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:27,442 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-30 10:47:27,443 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:27,443 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:27,443 INFO L82 PathProgramCache]: Analyzing trace with hash -148531037, now seen corresponding path program 42 times [2018-09-30 10:47:27,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:27,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:27,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:27,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:27,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:27,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:27,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:27,738 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:47:27,814 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 10:47:27,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:27,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:28,161 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:28,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 10:47:28,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 10:47:28,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 10:47:28,163 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:28,163 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-30 10:47:28,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:28,484 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 10:47:28,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 10:47:28,485 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-30 10:47:28,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:28,485 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:47:28,485 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:47:28,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:28,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:47:28,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 10:47:28,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 10:47:28,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 10:47:28,488 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-30 10:47:28,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:28,488 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 10:47:28,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 10:47:28,488 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 10:47:28,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 10:47:28,489 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:28,489 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-30 10:47:28,489 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:28,489 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:28,490 INFO L82 PathProgramCache]: Analyzing trace with hash -309493044, now seen corresponding path program 43 times [2018-09-30 10:47:28,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:28,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:28,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:28,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:28,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:28,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:28,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:28,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:28,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:28,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:29,068 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:29,068 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 10:47:29,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 10:47:29,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 10:47:29,069 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:29,069 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-30 10:47:29,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:29,438 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-30 10:47:29,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 10:47:29,438 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-30 10:47:29,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:29,439 INFO L225 Difference]: With dead ends: 50 [2018-09-30 10:47:29,439 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 10:47:29,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:29,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 10:47:29,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 10:47:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 10:47:29,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 10:47:29,441 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-30 10:47:29,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:29,442 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 10:47:29,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 10:47:29,442 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 10:47:29,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 10:47:29,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:29,443 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-30 10:47:29,443 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:29,443 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:29,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1004347965, now seen corresponding path program 44 times [2018-09-30 10:47:29,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:29,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:29,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:29,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:29,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:29,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:29,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:29,894 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:47:29,962 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:47:29,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:29,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:30,092 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:30,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 10:47:30,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 10:47:30,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 10:47:30,093 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:30,093 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-30 10:47:30,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:30,455 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 10:47:30,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:47:30,455 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-30 10:47:30,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:30,456 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:47:30,456 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:47:30,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:30,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:47:30,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 10:47:30,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 10:47:30,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 10:47:30,458 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-30 10:47:30,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:30,459 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 10:47:30,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 10:47:30,459 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 10:47:30,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 10:47:30,460 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:30,460 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-30 10:47:30,460 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:30,460 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:30,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1070014036, now seen corresponding path program 45 times [2018-09-30 10:47:30,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:30,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:30,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:30,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:30,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:30,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:30,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:30,786 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:47:30,873 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 10:47:30,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:30,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:31,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:31,075 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:31,076 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 10:47:31,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 10:47:31,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 10:47:31,077 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:31,077 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-30 10:47:31,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:31,570 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-30 10:47:31,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 10:47:31,570 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-30 10:47:31,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:31,570 INFO L225 Difference]: With dead ends: 52 [2018-09-30 10:47:31,571 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 10:47:31,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:31,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 10:47:31,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 10:47:31,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 10:47:31,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 10:47:31,572 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-30 10:47:31,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:31,572 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 10:47:31,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 10:47:31,573 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 10:47:31,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 10:47:31,573 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:31,573 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-30 10:47:31,573 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:31,574 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:31,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1189305059, now seen corresponding path program 46 times [2018-09-30 10:47:31,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:31,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:31,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:31,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:31,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:31,880 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:31,880 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:31,888 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:47:31,953 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:47:31,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:31,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:32,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:32,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 10:47:32,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 10:47:32,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 10:47:32,118 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:32,118 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-30 10:47:32,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:32,439 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 10:47:32,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:47:32,439 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-30 10:47:32,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:32,440 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:47:32,440 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:47:32,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:32,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:47:32,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 10:47:32,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 10:47:32,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 10:47:32,443 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-30 10:47:32,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:32,443 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 10:47:32,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 10:47:32,444 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 10:47:32,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 10:47:32,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:32,444 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-30 10:47:32,444 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:32,445 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:32,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1786247028, now seen corresponding path program 47 times [2018-09-30 10:47:32,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:32,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:32,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:32,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:32,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:32,843 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:32,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:32,850 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:47:32,944 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 10:47:32,944 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:32,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:33,105 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:33,105 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 10:47:33,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 10:47:33,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 10:47:33,106 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:33,106 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-30 10:47:33,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:33,413 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-30 10:47:33,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 10:47:33,414 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-30 10:47:33,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:33,414 INFO L225 Difference]: With dead ends: 54 [2018-09-30 10:47:33,414 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 10:47:33,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:33,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 10:47:33,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 10:47:33,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 10:47:33,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 10:47:33,417 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-30 10:47:33,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:33,418 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 10:47:33,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 10:47:33,418 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 10:47:33,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 10:47:33,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:33,419 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-30 10:47:33,419 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:33,419 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:33,419 INFO L82 PathProgramCache]: Analyzing trace with hash 460918787, now seen corresponding path program 48 times [2018-09-30 10:47:33,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:33,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:33,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:33,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:33,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:33,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:33,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:33,842 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:47:33,941 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 10:47:33,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:33,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:34,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:34,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 10:47:34,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 10:47:34,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 10:47:34,133 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:34,133 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-30 10:47:34,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:34,458 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 10:47:34,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 10:47:34,459 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-30 10:47:34,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:34,459 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:47:34,459 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:47:34,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:34,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:47:34,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 10:47:34,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 10:47:34,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 10:47:34,462 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-30 10:47:34,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:34,462 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 10:47:34,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 10:47:34,462 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 10:47:34,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 10:47:34,462 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:34,463 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-30 10:47:34,463 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:34,463 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:34,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1403582316, now seen corresponding path program 49 times [2018-09-30 10:47:34,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:34,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:34,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:34,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:34,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:35,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:35,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:35,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:35,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:35,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:35,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 10:47:35,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 10:47:35,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 10:47:35,887 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:35,888 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-30 10:47:36,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:36,164 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-30 10:47:36,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 10:47:36,164 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-30 10:47:36,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:36,165 INFO L225 Difference]: With dead ends: 56 [2018-09-30 10:47:36,165 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 10:47:36,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:36,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 10:47:36,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 10:47:36,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 10:47:36,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 10:47:36,167 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-30 10:47:36,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:36,167 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 10:47:36,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 10:47:36,168 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 10:47:36,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 10:47:36,168 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:36,168 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-30 10:47:36,169 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:36,169 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:36,169 INFO L82 PathProgramCache]: Analyzing trace with hash 561380643, now seen corresponding path program 50 times [2018-09-30 10:47:36,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:36,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:36,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:36,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:36,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:36,574 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:36,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:36,582 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:47:36,653 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:47:36,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:36,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:36,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:36,804 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:36,804 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 10:47:36,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 10:47:36,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 10:47:36,805 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:36,805 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-30 10:47:37,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:37,115 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 10:47:37,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 10:47:37,115 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-30 10:47:37,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:37,116 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:47:37,116 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:47:37,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:37,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:47:37,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 10:47:37,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 10:47:37,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 10:47:37,118 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-30 10:47:37,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:37,118 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 10:47:37,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 10:47:37,119 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 10:47:37,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 10:47:37,119 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:37,119 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-30 10:47:37,119 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:37,120 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:37,120 INFO L82 PathProgramCache]: Analyzing trace with hash 222932556, now seen corresponding path program 51 times [2018-09-30 10:47:37,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:37,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:37,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:37,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:37,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:37,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:37,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:37,521 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:47:37,627 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-30 10:47:37,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:37,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:37,775 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:37,776 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 10:47:37,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 10:47:37,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 10:47:37,777 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:37,777 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-30 10:47:38,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:38,148 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-30 10:47:38,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 10:47:38,149 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-30 10:47:38,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:38,149 INFO L225 Difference]: With dead ends: 58 [2018-09-30 10:47:38,150 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 10:47:38,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:38,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 10:47:38,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 10:47:38,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 10:47:38,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 10:47:38,152 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-30 10:47:38,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:38,152 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 10:47:38,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 10:47:38,152 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 10:47:38,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 10:47:38,153 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:38,153 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-30 10:47:38,153 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:38,153 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:38,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1679023549, now seen corresponding path program 52 times [2018-09-30 10:47:38,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:38,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:38,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:38,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:38,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:39,068 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:39,068 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:39,076 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:47:39,148 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:47:39,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:39,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:39,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:39,407 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:39,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 10:47:39,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 10:47:39,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 10:47:39,408 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:39,408 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-30 10:47:39,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:39,845 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 10:47:39,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:47:39,845 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-30 10:47:39,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:39,846 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:47:39,846 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:47:39,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:39,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:47:39,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 10:47:39,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 10:47:39,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 10:47:39,848 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-30 10:47:39,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:39,848 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 10:47:39,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 10:47:39,848 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 10:47:39,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 10:47:39,849 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:39,849 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-30 10:47:39,849 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:39,849 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:39,849 INFO L82 PathProgramCache]: Analyzing trace with hash -510120660, now seen corresponding path program 53 times [2018-09-30 10:47:39,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:39,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:39,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:39,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:39,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:40,431 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:40,431 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:40,439 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:47:40,559 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 10:47:40,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:40,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:40,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:40,708 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:40,709 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 10:47:40,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 10:47:40,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 10:47:40,709 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:40,710 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-30 10:47:41,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:41,104 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-30 10:47:41,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 10:47:41,104 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-30 10:47:41,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:41,105 INFO L225 Difference]: With dead ends: 60 [2018-09-30 10:47:41,105 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 10:47:41,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:41,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 10:47:41,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 10:47:41,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 10:47:41,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 10:47:41,107 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-30 10:47:41,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:41,108 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 10:47:41,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 10:47:41,108 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 10:47:41,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 10:47:41,108 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:41,108 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-30 10:47:41,108 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:41,108 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:41,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1366130531, now seen corresponding path program 54 times [2018-09-30 10:47:41,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:41,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:41,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:41,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:41,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:41,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:41,415 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:41,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:41,422 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:47:41,541 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-30 10:47:41,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:41,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:41,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:41,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 10:47:41,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 10:47:41,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 10:47:41,764 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:41,764 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-30 10:47:42,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:42,150 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 10:47:42,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 10:47:42,150 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-30 10:47:42,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:42,151 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:47:42,151 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:47:42,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:42,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:47:42,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 10:47:42,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 10:47:42,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 10:47:42,153 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-30 10:47:42,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:42,153 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 10:47:42,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 10:47:42,153 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 10:47:42,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 10:47:42,154 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:42,154 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-30 10:47:42,154 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:42,154 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:42,154 INFO L82 PathProgramCache]: Analyzing trace with hash -599624692, now seen corresponding path program 55 times [2018-09-30 10:47:42,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:42,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:42,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:42,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:42,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:42,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:42,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:42,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:42,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:42,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:42,732 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:42,732 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 10:47:42,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 10:47:42,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 10:47:42,733 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:42,733 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-30 10:47:43,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:43,152 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-30 10:47:43,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 10:47:43,153 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-30 10:47:43,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:43,153 INFO L225 Difference]: With dead ends: 62 [2018-09-30 10:47:43,153 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 10:47:43,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:43,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 10:47:43,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 10:47:43,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 10:47:43,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 10:47:43,156 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-30 10:47:43,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:43,156 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 10:47:43,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 10:47:43,156 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 10:47:43,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 10:47:43,157 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:43,157 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-30 10:47:43,157 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:43,157 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:43,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1408494461, now seen corresponding path program 56 times [2018-09-30 10:47:43,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:43,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:43,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:43,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:43,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:43,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:43,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:43,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:47:43,557 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:47:43,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:43,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:43,720 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:43,720 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 10:47:43,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 10:47:43,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 10:47:43,721 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:43,721 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-30 10:47:44,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:44,134 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 10:47:44,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 10:47:44,135 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-30 10:47:44,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:44,135 INFO L225 Difference]: With dead ends: 63 [2018-09-30 10:47:44,135 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 10:47:44,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:44,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 10:47:44,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 10:47:44,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 10:47:44,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 10:47:44,139 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-30 10:47:44,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:44,139 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 10:47:44,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 10:47:44,139 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 10:47:44,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 10:47:44,140 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:44,140 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-30 10:47:44,140 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:44,140 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:44,140 INFO L82 PathProgramCache]: Analyzing trace with hash -713653524, now seen corresponding path program 57 times [2018-09-30 10:47:44,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:44,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:44,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:44,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:44,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:44,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:44,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:44,653 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:47:44,774 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-30 10:47:44,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:44,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:44,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:44,980 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:44,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 10:47:44,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 10:47:44,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 10:47:44,981 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:44,981 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-30 10:47:45,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:45,425 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-30 10:47:45,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 10:47:45,425 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-30 10:47:45,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:45,426 INFO L225 Difference]: With dead ends: 64 [2018-09-30 10:47:45,426 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 10:47:45,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:45,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 10:47:45,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 10:47:45,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 10:47:45,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 10:47:45,429 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-30 10:47:45,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:45,429 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 10:47:45,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 10:47:45,429 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 10:47:45,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 10:47:45,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:45,430 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-30 10:47:45,430 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:45,430 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:45,430 INFO L82 PathProgramCache]: Analyzing trace with hash -648420957, now seen corresponding path program 58 times [2018-09-30 10:47:45,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:45,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:45,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:45,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:45,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:45,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:45,742 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:45,751 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:47:45,827 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:47:45,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:45,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:45,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:45,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:45,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 10:47:45,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 10:47:45,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 10:47:45,995 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:45,996 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-30 10:47:46,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:46,447 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 10:47:46,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 10:47:46,448 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-30 10:47:46,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:46,448 INFO L225 Difference]: With dead ends: 65 [2018-09-30 10:47:46,448 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 10:47:46,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:46,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 10:47:46,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 10:47:46,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 10:47:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 10:47:46,451 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-30 10:47:46,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:46,451 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 10:47:46,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 10:47:46,451 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 10:47:46,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 10:47:46,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:46,452 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-30 10:47:46,452 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:46,452 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:46,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1373788620, now seen corresponding path program 59 times [2018-09-30 10:47:46,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:46,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:46,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:46,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:46,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:46,810 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:46,810 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:46,818 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:47:46,955 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 10:47:46,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:46,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:47,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:47,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 10:47:47,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 10:47:47,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 10:47:47,222 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:47,222 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-30 10:47:47,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:47,683 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-30 10:47:47,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 10:47:47,683 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-30 10:47:47,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:47,683 INFO L225 Difference]: With dead ends: 66 [2018-09-30 10:47:47,683 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 10:47:47,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:47,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 10:47:47,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 10:47:47,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 10:47:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 10:47:47,685 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-30 10:47:47,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:47,686 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 10:47:47,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 10:47:47,686 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 10:47:47,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 10:47:47,686 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:47,686 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-30 10:47:47,686 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:47,686 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:47,687 INFO L82 PathProgramCache]: Analyzing trace with hash -362223933, now seen corresponding path program 60 times [2018-09-30 10:47:47,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:47,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:47,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:47,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:47,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:48,071 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:48,071 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:48,080 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:47:48,208 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 10:47:48,208 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:48,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:48,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:48,383 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:48,383 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 10:47:48,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 10:47:48,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 10:47:48,384 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:48,384 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-30 10:47:48,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:48,795 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 10:47:48,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 10:47:48,796 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-30 10:47:48,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:48,796 INFO L225 Difference]: With dead ends: 67 [2018-09-30 10:47:48,796 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 10:47:48,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:48,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 10:47:48,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 10:47:48,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 10:47:48,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 10:47:48,799 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-30 10:47:48,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:48,799 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 10:47:48,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 10:47:48,799 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 10:47:48,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 10:47:48,800 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:48,800 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-30 10:47:48,800 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:48,800 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:48,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1655961772, now seen corresponding path program 61 times [2018-09-30 10:47:48,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:48,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:48,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:48,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:48,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:49,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:49,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:49,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:49,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:49,592 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:49,592 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 10:47:49,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 10:47:49,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 10:47:49,593 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:49,593 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-30 10:47:50,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:50,002 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-30 10:47:50,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 10:47:50,002 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-30 10:47:50,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:50,003 INFO L225 Difference]: With dead ends: 68 [2018-09-30 10:47:50,003 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 10:47:50,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:50,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 10:47:50,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 10:47:50,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 10:47:50,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 10:47:50,005 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-30 10:47:50,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:50,005 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 10:47:50,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 10:47:50,005 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 10:47:50,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 10:47:50,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:50,005 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-30 10:47:50,005 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:50,006 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:50,006 INFO L82 PathProgramCache]: Analyzing trace with hash -204790813, now seen corresponding path program 62 times [2018-09-30 10:47:50,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:50,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:50,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:50,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:50,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:50,340 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:50,340 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:50,348 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:47:50,434 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:47:50,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:50,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:50,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:50,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 10:47:50,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 10:47:50,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 10:47:50,618 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:50,618 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-30 10:47:51,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:51,107 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 10:47:51,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 10:47:51,108 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-30 10:47:51,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:51,108 INFO L225 Difference]: With dead ends: 69 [2018-09-30 10:47:51,108 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 10:47:51,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:51,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 10:47:51,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 10:47:51,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 10:47:51,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 10:47:51,111 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-30 10:47:51,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:51,111 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 10:47:51,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 10:47:51,111 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 10:47:51,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 10:47:51,112 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:51,112 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-30 10:47:51,112 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:51,112 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:51,112 INFO L82 PathProgramCache]: Analyzing trace with hash -2053546100, now seen corresponding path program 63 times [2018-09-30 10:47:51,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:51,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:51,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:51,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:51,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:51,538 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:51,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:51,548 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:47:51,776 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-30 10:47:51,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:51,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:52,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:52,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:52,139 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 10:47:52,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 10:47:52,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 10:47:52,143 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:52,143 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-30 10:47:52,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:52,727 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-30 10:47:52,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 10:47:52,728 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-30 10:47:52,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:52,728 INFO L225 Difference]: With dead ends: 70 [2018-09-30 10:47:52,728 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 10:47:52,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:52,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 10:47:52,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 10:47:52,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 10:47:52,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 10:47:52,731 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-30 10:47:52,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:52,732 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 10:47:52,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 10:47:52,732 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 10:47:52,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 10:47:52,732 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:52,733 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-30 10:47:52,733 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:52,733 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:52,733 INFO L82 PathProgramCache]: Analyzing trace with hash 764582147, now seen corresponding path program 64 times [2018-09-30 10:47:52,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:52,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:52,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:52,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:52,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:53,089 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:53,089 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:53,105 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:47:53,199 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:47:53,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:53,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:53,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:53,398 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:53,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 10:47:53,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 10:47:53,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 10:47:53,400 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:53,400 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-30 10:47:53,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:53,920 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 10:47:53,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 10:47:53,920 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-30 10:47:53,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:53,921 INFO L225 Difference]: With dead ends: 71 [2018-09-30 10:47:53,921 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 10:47:53,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:53,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 10:47:53,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 10:47:53,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 10:47:53,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 10:47:53,923 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-30 10:47:53,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:53,923 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 10:47:53,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 10:47:53,923 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 10:47:53,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 10:47:53,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:53,924 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-30 10:47:53,924 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:53,924 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:53,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2067755412, now seen corresponding path program 65 times [2018-09-30 10:47:53,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:53,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:53,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:53,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:53,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:54,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:54,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:54,507 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:47:54,661 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 10:47:54,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:54,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:54,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:54,989 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 10:47:54,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 10:47:54,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 10:47:54,990 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:54,990 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-30 10:47:55,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:55,488 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-30 10:47:55,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 10:47:55,489 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-30 10:47:55,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:55,489 INFO L225 Difference]: With dead ends: 72 [2018-09-30 10:47:55,489 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 10:47:55,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:55,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 10:47:55,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 10:47:55,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 10:47:55,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 10:47:55,491 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-30 10:47:55,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:55,492 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 10:47:55,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 10:47:55,492 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 10:47:55,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 10:47:55,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:55,493 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-30 10:47:55,493 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:55,493 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:55,493 INFO L82 PathProgramCache]: Analyzing trace with hash 324093475, now seen corresponding path program 66 times [2018-09-30 10:47:55,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:55,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:55,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:55,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:55,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:55,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:55,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:55,869 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:47:56,016 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-30 10:47:56,017 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:47:56,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:58,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:58,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 10:47:58,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 10:47:58,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 10:47:58,349 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:58,349 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-09-30 10:47:58,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:47:58,697 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 10:47:58,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 10:47:58,698 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-09-30 10:47:58,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:47:58,698 INFO L225 Difference]: With dead ends: 73 [2018-09-30 10:47:58,698 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 10:47:58,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:47:58,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 10:47:58,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 10:47:58,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 10:47:58,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 10:47:58,701 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-30 10:47:58,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:47:58,701 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 10:47:58,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 10:47:58,701 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 10:47:58,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 10:47:58,702 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:47:58,702 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-30 10:47:58,702 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:47:58,702 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:47:58,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1456964940, now seen corresponding path program 67 times [2018-09-30 10:47:58,702 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:47:58,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:47:58,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:58,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:47:58,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:47:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:59,078 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:47:59,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:47:59,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:47:59,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:47:59,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:47:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:47:59,362 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:47:59,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 10:47:59,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 10:47:59,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 10:47:59,363 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:47:59,363 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-09-30 10:48:00,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:00,094 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-30 10:48:00,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 10:48:00,095 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-30 10:48:00,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:00,095 INFO L225 Difference]: With dead ends: 74 [2018-09-30 10:48:00,095 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 10:48:00,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:00,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 10:48:00,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 10:48:00,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 10:48:00,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 10:48:00,097 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-30 10:48:00,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:00,097 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 10:48:00,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 10:48:00,098 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 10:48:00,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 10:48:00,098 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:00,098 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-30 10:48:00,098 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:00,098 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:00,098 INFO L82 PathProgramCache]: Analyzing trace with hash -2078725309, now seen corresponding path program 68 times [2018-09-30 10:48:00,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:00,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:00,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:00,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:00,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:00,654 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:00,654 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:00,662 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:48:00,754 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:48:00,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:00,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:01,119 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:01,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 10:48:01,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 10:48:01,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 10:48:01,120 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:01,120 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-09-30 10:48:01,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:01,522 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 10:48:01,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 10:48:01,522 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-09-30 10:48:01,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:01,523 INFO L225 Difference]: With dead ends: 75 [2018-09-30 10:48:01,523 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 10:48:01,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:01,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 10:48:01,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 10:48:01,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 10:48:01,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 10:48:01,525 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-30 10:48:01,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:01,525 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 10:48:01,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 10:48:01,525 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 10:48:01,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 10:48:01,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:01,526 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-30 10:48:01,526 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:01,526 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:01,526 INFO L82 PathProgramCache]: Analyzing trace with hash -15973332, now seen corresponding path program 69 times [2018-09-30 10:48:01,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:01,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:01,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:01,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:01,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:01,923 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:01,923 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:01,930 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:48:02,098 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-30 10:48:02,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:02,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:02,405 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:02,405 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 10:48:02,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 10:48:02,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 10:48:02,406 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:02,406 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-09-30 10:48:03,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:03,015 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-30 10:48:03,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 10:48:03,015 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-09-30 10:48:03,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:03,016 INFO L225 Difference]: With dead ends: 76 [2018-09-30 10:48:03,016 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 10:48:03,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:03,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 10:48:03,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 10:48:03,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 10:48:03,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-30 10:48:03,019 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-30 10:48:03,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:03,019 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-30 10:48:03,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 10:48:03,019 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-30 10:48:03,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 10:48:03,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:03,020 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-30 10:48:03,020 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:03,020 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:03,021 INFO L82 PathProgramCache]: Analyzing trace with hash -495171485, now seen corresponding path program 70 times [2018-09-30 10:48:03,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:03,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:03,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:03,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:03,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:04,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:04,002 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:04,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:04,013 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:48:04,122 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:48:04,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:04,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:04,315 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:04,316 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 10:48:04,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 10:48:04,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 10:48:04,317 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:04,317 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-09-30 10:48:05,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:05,005 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 10:48:05,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 10:48:05,006 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-09-30 10:48:05,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:05,006 INFO L225 Difference]: With dead ends: 77 [2018-09-30 10:48:05,006 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 10:48:05,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:05,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 10:48:05,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 10:48:05,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 10:48:05,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 10:48:05,009 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-30 10:48:05,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:05,009 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 10:48:05,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 10:48:05,009 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 10:48:05,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 10:48:05,010 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:05,010 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-30 10:48:05,010 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:05,010 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:05,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1829554956, now seen corresponding path program 71 times [2018-09-30 10:48:05,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:05,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:05,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:05,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:05,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:05,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:05,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:05,473 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:48:05,642 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 10:48:05,642 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:05,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:05,934 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:05,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 10:48:05,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 10:48:05,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 10:48:05,935 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:05,935 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-09-30 10:48:06,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:06,510 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-30 10:48:06,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 10:48:06,510 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-30 10:48:06,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:06,511 INFO L225 Difference]: With dead ends: 78 [2018-09-30 10:48:06,511 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 10:48:06,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:06,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 10:48:06,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 10:48:06,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 10:48:06,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-30 10:48:06,516 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-30 10:48:06,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:06,517 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-30 10:48:06,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 10:48:06,517 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-30 10:48:06,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 10:48:06,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:06,518 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-30 10:48:06,518 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:06,518 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:06,518 INFO L82 PathProgramCache]: Analyzing trace with hash 881630595, now seen corresponding path program 72 times [2018-09-30 10:48:06,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:06,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:06,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:06,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:06,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:06,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:06,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:06,989 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:06,997 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:48:07,160 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 10:48:07,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:07,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:07,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:07,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 10:48:07,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 10:48:07,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 10:48:07,362 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:07,362 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-09-30 10:48:07,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:07,954 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 10:48:07,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 10:48:07,954 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-09-30 10:48:07,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:07,955 INFO L225 Difference]: With dead ends: 79 [2018-09-30 10:48:07,955 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 10:48:07,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:07,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 10:48:07,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 10:48:07,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 10:48:07,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 10:48:07,958 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-30 10:48:07,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:07,958 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 10:48:07,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 10:48:07,958 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 10:48:07,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 10:48:07,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:07,959 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-30 10:48:07,959 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:07,959 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:07,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1560746476, now seen corresponding path program 73 times [2018-09-30 10:48:07,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:07,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:07,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:07,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:07,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:08,735 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:08,736 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:08,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:08,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:09,350 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:09,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 10:48:09,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 10:48:09,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 10:48:09,351 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:09,351 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-09-30 10:48:10,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:10,146 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-30 10:48:10,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 10:48:10,146 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-09-30 10:48:10,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:10,147 INFO L225 Difference]: With dead ends: 80 [2018-09-30 10:48:10,147 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 10:48:10,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:10,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 10:48:10,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 10:48:10,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 10:48:10,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-30 10:48:10,149 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-30 10:48:10,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:10,149 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-30 10:48:10,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 10:48:10,150 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-30 10:48:10,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 10:48:10,150 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:10,150 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-30 10:48:10,150 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:10,150 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:10,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1138502307, now seen corresponding path program 74 times [2018-09-30 10:48:10,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:10,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:10,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:10,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:10,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:10,592 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:10,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:10,599 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:48:10,699 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:48:10,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:10,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:10,897 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:10,898 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 10:48:10,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 10:48:10,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 10:48:10,899 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:10,899 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-09-30 10:48:11,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:11,527 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 10:48:11,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 10:48:11,528 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-09-30 10:48:11,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:11,528 INFO L225 Difference]: With dead ends: 81 [2018-09-30 10:48:11,528 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 10:48:11,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:11,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 10:48:11,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 10:48:11,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 10:48:11,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 10:48:11,531 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-30 10:48:11,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:11,531 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 10:48:11,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 10:48:11,532 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 10:48:11,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 10:48:11,532 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:11,532 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-30 10:48:11,532 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:11,533 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:11,533 INFO L82 PathProgramCache]: Analyzing trace with hash 933834956, now seen corresponding path program 75 times [2018-09-30 10:48:11,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:11,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:11,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:11,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:11,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:11,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:11,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:11,987 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:48:12,170 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-30 10:48:12,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:12,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:12,382 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:12,382 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 10:48:12,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 10:48:12,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 10:48:12,383 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:12,383 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-09-30 10:48:13,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:13,837 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-30 10:48:13,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 10:48:13,837 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-09-30 10:48:13,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:13,838 INFO L225 Difference]: With dead ends: 82 [2018-09-30 10:48:13,838 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 10:48:13,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:13,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 10:48:13,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 10:48:13,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 10:48:13,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-30 10:48:13,840 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-30 10:48:13,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:13,840 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-30 10:48:13,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 10:48:13,840 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-30 10:48:13,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 10:48:13,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:13,841 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-30 10:48:13,841 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:13,841 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:13,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1115885629, now seen corresponding path program 76 times [2018-09-30 10:48:13,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:13,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:13,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:13,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:13,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:14,285 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:14,285 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:14,293 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:48:14,395 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:48:14,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:14,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:14,599 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:14,600 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 10:48:14,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 10:48:14,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 10:48:14,601 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:14,601 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-09-30 10:48:15,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:15,468 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 10:48:15,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 10:48:15,469 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-09-30 10:48:15,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:15,469 INFO L225 Difference]: With dead ends: 83 [2018-09-30 10:48:15,469 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 10:48:15,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:15,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 10:48:15,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 10:48:15,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 10:48:15,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 10:48:15,472 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-30 10:48:15,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:15,472 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 10:48:15,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 10:48:15,472 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 10:48:15,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 10:48:15,473 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:15,473 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-30 10:48:15,473 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:15,473 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:15,473 INFO L82 PathProgramCache]: Analyzing trace with hash -232714324, now seen corresponding path program 77 times [2018-09-30 10:48:15,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:15,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:15,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:15,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:15,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:15,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:15,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:15,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:15,974 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:48:16,160 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-30 10:48:16,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:16,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:16,365 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:16,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 10:48:16,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 10:48:16,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 10:48:16,366 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:16,366 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-09-30 10:48:17,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:17,029 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-30 10:48:17,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 10:48:17,029 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-09-30 10:48:17,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:17,030 INFO L225 Difference]: With dead ends: 84 [2018-09-30 10:48:17,030 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 10:48:17,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:17,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 10:48:17,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 10:48:17,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 10:48:17,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-30 10:48:17,032 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-30 10:48:17,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:17,032 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-30 10:48:17,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 10:48:17,032 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-30 10:48:17,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 10:48:17,033 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:17,033 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-30 10:48:17,033 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:17,033 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:17,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1375792355, now seen corresponding path program 78 times [2018-09-30 10:48:17,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:17,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:17,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:17,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:17,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:17,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:17,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:17,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:17,491 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:48:17,673 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-30 10:48:17,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:17,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:18,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:18,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 10:48:18,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 10:48:18,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 10:48:18,230 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:18,230 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-09-30 10:48:18,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:18,750 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 10:48:18,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 10:48:18,750 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-09-30 10:48:18,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:18,751 INFO L225 Difference]: With dead ends: 85 [2018-09-30 10:48:18,751 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 10:48:18,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:18,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 10:48:18,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 10:48:18,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 10:48:18,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 10:48:18,754 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-30 10:48:18,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:18,754 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 10:48:18,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 10:48:18,754 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 10:48:18,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 10:48:18,754 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:18,755 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-30 10:48:18,755 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:18,755 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:18,755 INFO L82 PathProgramCache]: Analyzing trace with hash -300108148, now seen corresponding path program 79 times [2018-09-30 10:48:18,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:18,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:18,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:18,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:18,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:19,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:19,233 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:19,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:19,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:19,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:19,553 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:19,553 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 10:48:19,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 10:48:19,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 10:48:19,555 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:19,555 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-09-30 10:48:20,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:20,376 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-30 10:48:20,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 10:48:20,376 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-09-30 10:48:20,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:20,377 INFO L225 Difference]: With dead ends: 86 [2018-09-30 10:48:20,377 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 10:48:20,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:20,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 10:48:20,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-30 10:48:20,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 10:48:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-30 10:48:20,380 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-30 10:48:20,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:20,380 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-30 10:48:20,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 10:48:20,380 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-30 10:48:20,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 10:48:20,381 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:20,381 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-30 10:48:20,381 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:20,381 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:20,381 INFO L82 PathProgramCache]: Analyzing trace with hash -713416189, now seen corresponding path program 80 times [2018-09-30 10:48:20,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:20,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:20,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:20,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:20,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:20,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:20,857 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:20,857 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:20,864 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:48:20,972 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:48:20,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:20,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:21,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:21,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:21,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 10:48:21,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 10:48:21,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 10:48:21,658 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:21,658 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-09-30 10:48:22,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:22,371 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 10:48:22,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 10:48:22,372 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-09-30 10:48:22,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:22,372 INFO L225 Difference]: With dead ends: 87 [2018-09-30 10:48:22,372 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 10:48:22,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:22,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 10:48:22,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 10:48:22,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 10:48:22,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-30 10:48:22,375 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-30 10:48:22,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:22,375 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-30 10:48:22,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 10:48:22,375 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-30 10:48:22,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 10:48:22,376 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:22,376 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-30 10:48:22,376 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:22,376 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:22,376 INFO L82 PathProgramCache]: Analyzing trace with hash -641063572, now seen corresponding path program 81 times [2018-09-30 10:48:22,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:22,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:22,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:22,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:22,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:22,923 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:22,923 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:22,930 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:48:23,137 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-30 10:48:23,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:23,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:23,390 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:23,390 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 10:48:23,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 10:48:23,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 10:48:23,391 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:23,391 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-09-30 10:48:23,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:23,992 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-30 10:48:23,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 10:48:23,993 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-09-30 10:48:23,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:23,993 INFO L225 Difference]: With dead ends: 88 [2018-09-30 10:48:23,993 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 10:48:23,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:23,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 10:48:23,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 10:48:23,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 10:48:23,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-30 10:48:23,995 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-30 10:48:23,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:23,996 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-30 10:48:23,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 10:48:23,996 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-30 10:48:23,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-30 10:48:23,996 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:23,996 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-30 10:48:23,996 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:23,996 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:23,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1601867555, now seen corresponding path program 82 times [2018-09-30 10:48:23,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:23,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:23,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:23,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:23,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:24,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:24,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:24,491 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:48:24,604 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:48:24,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:24,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:24,900 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:24,900 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 10:48:24,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 10:48:24,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 10:48:24,902 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:24,902 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-09-30 10:48:25,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:25,836 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 10:48:25,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 10:48:25,837 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-09-30 10:48:25,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:25,837 INFO L225 Difference]: With dead ends: 89 [2018-09-30 10:48:25,837 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 10:48:25,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:25,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 10:48:25,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 10:48:25,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 10:48:25,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 10:48:25,840 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-30 10:48:25,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:25,840 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 10:48:25,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 10:48:25,840 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 10:48:25,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 10:48:25,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:25,841 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-30 10:48:25,841 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:25,841 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:25,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1881711540, now seen corresponding path program 83 times [2018-09-30 10:48:25,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:25,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:25,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:25,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:25,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:26,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:26,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:26,353 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:48:26,562 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-30 10:48:26,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:26,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:27,409 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:27,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 10:48:27,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 10:48:27,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 10:48:27,410 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:27,410 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-09-30 10:48:28,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:28,167 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-30 10:48:28,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 10:48:28,168 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-09-30 10:48:28,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:28,168 INFO L225 Difference]: With dead ends: 90 [2018-09-30 10:48:28,168 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 10:48:28,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:28,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 10:48:28,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 10:48:28,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 10:48:28,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-30 10:48:28,170 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-30 10:48:28,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:28,170 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-30 10:48:28,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 10:48:28,171 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-30 10:48:28,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 10:48:28,171 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:28,171 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-30 10:48:28,171 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:28,171 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:28,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1796486211, now seen corresponding path program 84 times [2018-09-30 10:48:28,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:28,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:28,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:28,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:28,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:28,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:28,685 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:28,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:28,697 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:48:28,909 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 10:48:28,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:28,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:29,122 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:29,123 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-30 10:48:29,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 10:48:29,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 10:48:29,124 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:29,124 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-09-30 10:48:29,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:29,759 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 10:48:29,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 10:48:29,759 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-09-30 10:48:29,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:29,760 INFO L225 Difference]: With dead ends: 91 [2018-09-30 10:48:29,760 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 10:48:29,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:29,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 10:48:29,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 10:48:29,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 10:48:29,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-30 10:48:29,763 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-30 10:48:29,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:29,763 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-30 10:48:29,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 10:48:29,763 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-30 10:48:29,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 10:48:29,763 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:29,764 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-30 10:48:29,764 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:29,764 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:29,764 INFO L82 PathProgramCache]: Analyzing trace with hash -143500500, now seen corresponding path program 85 times [2018-09-30 10:48:29,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:29,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:29,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:29,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:29,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:30,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:30,480 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:30,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:30,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:30,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:30,842 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:30,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 10:48:30,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 10:48:30,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 10:48:30,844 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:30,844 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-09-30 10:48:31,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:31,391 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-30 10:48:31,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 10:48:31,392 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-09-30 10:48:31,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:31,392 INFO L225 Difference]: With dead ends: 92 [2018-09-30 10:48:31,392 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 10:48:31,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:31,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 10:48:31,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-30 10:48:31,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 10:48:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-30 10:48:31,395 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-30 10:48:31,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:31,395 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-30 10:48:31,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 10:48:31,396 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-30 10:48:31,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 10:48:31,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:31,396 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-30 10:48:31,396 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:31,396 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:31,396 INFO L82 PathProgramCache]: Analyzing trace with hash -153546397, now seen corresponding path program 86 times [2018-09-30 10:48:31,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:31,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:31,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:31,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:31,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:31,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:31,945 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:31,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:31,952 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:48:32,073 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:48:32,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:32,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:32,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:32,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 10:48:32,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 10:48:32,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 10:48:32,303 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:32,303 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-09-30 10:48:32,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:32,877 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 10:48:32,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 10:48:32,878 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-09-30 10:48:32,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:32,878 INFO L225 Difference]: With dead ends: 93 [2018-09-30 10:48:32,878 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 10:48:32,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:32,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 10:48:32,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 10:48:32,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 10:48:32,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 10:48:32,880 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-30 10:48:32,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:32,881 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 10:48:32,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 10:48:32,881 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 10:48:32,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 10:48:32,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:32,881 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-30 10:48:32,881 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:32,881 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:32,882 INFO L82 PathProgramCache]: Analyzing trace with hash -464969204, now seen corresponding path program 87 times [2018-09-30 10:48:32,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:32,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:32,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:32,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:32,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:33,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:33,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:33,417 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:48:33,648 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-30 10:48:33,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:33,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:33,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:33,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 10:48:33,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 10:48:33,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 10:48:33,872 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:33,872 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-09-30 10:48:34,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:34,469 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-30 10:48:34,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 10:48:34,476 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-09-30 10:48:34,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:34,476 INFO L225 Difference]: With dead ends: 94 [2018-09-30 10:48:34,476 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 10:48:34,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:34,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 10:48:34,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 10:48:34,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 10:48:34,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-30 10:48:34,479 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-30 10:48:34,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:34,479 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-30 10:48:34,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 10:48:34,479 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-30 10:48:34,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-30 10:48:34,480 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:34,480 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-30 10:48:34,480 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:34,480 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:34,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1529141629, now seen corresponding path program 88 times [2018-09-30 10:48:34,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:34,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:34,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:34,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:34,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:35,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:35,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:35,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:35,046 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:48:35,169 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:48:35,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:35,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:35,419 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:35,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-30 10:48:35,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 10:48:35,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 10:48:35,421 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:35,421 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-09-30 10:48:36,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:36,142 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 10:48:36,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 10:48:36,143 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-09-30 10:48:36,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:36,143 INFO L225 Difference]: With dead ends: 95 [2018-09-30 10:48:36,143 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 10:48:36,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:36,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 10:48:36,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 10:48:36,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 10:48:36,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-30 10:48:36,145 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-30 10:48:36,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:36,146 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-30 10:48:36,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 10:48:36,146 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-30 10:48:36,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 10:48:36,146 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:36,146 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-30 10:48:36,146 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:36,147 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:36,147 INFO L82 PathProgramCache]: Analyzing trace with hash -158748436, now seen corresponding path program 89 times [2018-09-30 10:48:36,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:36,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:36,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:36,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:36,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:36,701 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:36,702 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:36,708 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:48:36,939 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 10:48:36,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:36,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:37,179 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:37,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 10:48:37,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 10:48:37,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 10:48:37,181 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:37,181 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-09-30 10:48:37,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:37,818 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-30 10:48:37,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 10:48:37,818 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-09-30 10:48:37,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:37,819 INFO L225 Difference]: With dead ends: 96 [2018-09-30 10:48:37,819 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 10:48:37,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:37,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 10:48:37,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 10:48:37,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 10:48:37,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-30 10:48:37,821 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-30 10:48:37,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:37,821 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-30 10:48:37,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 10:48:37,821 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-30 10:48:37,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 10:48:37,822 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:37,822 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-30 10:48:37,822 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:37,822 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:37,822 INFO L82 PathProgramCache]: Analyzing trace with hash -626232413, now seen corresponding path program 90 times [2018-09-30 10:48:37,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:37,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:37,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:37,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:37,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:38,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:38,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:38,418 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:48:38,648 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-30 10:48:38,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:38,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:38,884 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:38,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-30 10:48:38,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 10:48:38,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 10:48:38,885 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:38,885 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-09-30 10:48:39,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:39,620 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 10:48:39,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 10:48:39,621 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-09-30 10:48:39,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:39,621 INFO L225 Difference]: With dead ends: 97 [2018-09-30 10:48:39,621 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 10:48:39,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:39,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 10:48:39,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 10:48:39,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 10:48:39,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 10:48:39,624 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-30 10:48:39,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:39,624 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 10:48:39,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 10:48:39,625 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 10:48:39,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 10:48:39,625 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:39,625 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-30 10:48:39,625 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:39,626 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:39,626 INFO L82 PathProgramCache]: Analyzing trace with hash 2061633484, now seen corresponding path program 91 times [2018-09-30 10:48:39,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:39,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:39,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:39,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:39,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:40,207 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:40,208 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:40,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:40,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:40,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:40,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 10:48:40,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 10:48:40,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 10:48:40,661 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:40,661 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-09-30 10:48:41,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:41,741 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-30 10:48:41,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 10:48:41,742 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-09-30 10:48:41,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:41,742 INFO L225 Difference]: With dead ends: 98 [2018-09-30 10:48:41,742 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 10:48:41,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:41,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 10:48:41,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-30 10:48:41,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 10:48:41,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-30 10:48:41,745 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-30 10:48:41,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:41,746 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-30 10:48:41,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 10:48:41,746 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-30 10:48:41,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 10:48:41,746 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:41,746 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-30 10:48:41,746 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:41,747 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:41,747 INFO L82 PathProgramCache]: Analyzing trace with hash -513869629, now seen corresponding path program 92 times [2018-09-30 10:48:41,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:41,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:41,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:41,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:41,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:42,353 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:42,353 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:42,361 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:48:42,493 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:48:42,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:42,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:42,761 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:42,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 10:48:42,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 10:48:42,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 10:48:42,762 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:42,762 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-09-30 10:48:43,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:43,416 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 10:48:43,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 10:48:43,416 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-09-30 10:48:43,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:43,417 INFO L225 Difference]: With dead ends: 99 [2018-09-30 10:48:43,417 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 10:48:43,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:43,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 10:48:43,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 10:48:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 10:48:43,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-30 10:48:43,419 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-30 10:48:43,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:43,419 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-30 10:48:43,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 10:48:43,419 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-30 10:48:43,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 10:48:43,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:43,420 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-30 10:48:43,420 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:43,420 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:43,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1249912492, now seen corresponding path program 93 times [2018-09-30 10:48:43,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:43,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:43,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:43,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:43,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:44,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:44,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:44,019 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:48:44,283 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-30 10:48:44,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:44,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:44,531 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:44,532 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 10:48:44,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 10:48:44,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 10:48:44,533 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:44,533 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-09-30 10:48:45,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:45,384 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-30 10:48:45,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 10:48:45,385 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-09-30 10:48:45,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:45,385 INFO L225 Difference]: With dead ends: 100 [2018-09-30 10:48:45,385 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 10:48:45,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:45,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 10:48:45,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-30 10:48:45,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-30 10:48:45,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-30 10:48:45,388 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-30 10:48:45,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:45,388 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-30 10:48:45,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 10:48:45,388 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-30 10:48:45,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-30 10:48:45,389 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:45,389 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-30 10:48:45,389 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:45,389 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:45,390 INFO L82 PathProgramCache]: Analyzing trace with hash 92583395, now seen corresponding path program 94 times [2018-09-30 10:48:45,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:45,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:45,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:45,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:45,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:46,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:46,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:46,208 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:46,215 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:48:46,348 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:48:46,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:46,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:46,651 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:46,651 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-30 10:48:46,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 10:48:46,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 10:48:46,652 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:46,652 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-09-30 10:48:47,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:47,327 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 10:48:47,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 10:48:47,327 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-09-30 10:48:47,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:47,328 INFO L225 Difference]: With dead ends: 101 [2018-09-30 10:48:47,328 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 10:48:47,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:47,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 10:48:47,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 10:48:47,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 10:48:47,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 10:48:47,331 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-30 10:48:47,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:47,331 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 10:48:47,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 10:48:47,331 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 10:48:47,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 10:48:47,332 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:47,332 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-30 10:48:47,332 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:47,332 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:47,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1424880244, now seen corresponding path program 95 times [2018-09-30 10:48:47,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:47,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:47,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:47,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:47,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:47,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:47,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:47,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:47,974 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:48:48,236 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-30 10:48:48,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:48,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:48,489 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:48,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 10:48:48,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 10:48:48,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 10:48:48,491 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:48,491 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-09-30 10:48:49,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:49,466 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-30 10:48:49,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 10:48:49,467 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-09-30 10:48:49,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:49,467 INFO L225 Difference]: With dead ends: 102 [2018-09-30 10:48:49,467 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 10:48:49,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:49,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 10:48:49,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 10:48:49,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 10:48:49,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-30 10:48:49,470 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-30 10:48:49,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:49,470 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-30 10:48:49,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 10:48:49,470 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-30 10:48:49,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 10:48:49,471 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:49,471 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-30 10:48:49,471 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:49,471 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:49,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1221612797, now seen corresponding path program 96 times [2018-09-30 10:48:49,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:49,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:49,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:49,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:49,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:50,153 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:50,153 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:50,161 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:48:50,435 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 10:48:50,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:50,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:50,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:50,682 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-30 10:48:50,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 10:48:50,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 10:48:50,683 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:50,683 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-09-30 10:48:51,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:51,572 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 10:48:51,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 10:48:51,572 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-09-30 10:48:51,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:51,573 INFO L225 Difference]: With dead ends: 103 [2018-09-30 10:48:51,573 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 10:48:51,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:51,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 10:48:51,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 10:48:51,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 10:48:51,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-30 10:48:51,576 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-30 10:48:51,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:51,576 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-30 10:48:51,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 10:48:51,576 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-30 10:48:51,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 10:48:51,577 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:51,577 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-30 10:48:51,577 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:51,577 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:51,577 INFO L82 PathProgramCache]: Analyzing trace with hash 784710764, now seen corresponding path program 97 times [2018-09-30 10:48:51,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:51,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:51,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:51,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:51,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:52,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:52,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:52,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:52,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:52,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:52,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 10:48:52,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 10:48:52,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 10:48:52,590 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:52,590 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-09-30 10:48:53,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:53,337 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-30 10:48:53,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 10:48:53,337 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-09-30 10:48:53,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:53,338 INFO L225 Difference]: With dead ends: 104 [2018-09-30 10:48:53,338 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 10:48:53,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:53,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 10:48:53,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-30 10:48:53,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-30 10:48:53,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-30 10:48:53,341 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-30 10:48:53,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:53,341 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-30 10:48:53,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 10:48:53,341 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-30 10:48:53,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 10:48:53,341 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:53,341 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-30 10:48:53,342 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:53,342 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:53,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1443768285, now seen corresponding path program 98 times [2018-09-30 10:48:53,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:53,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:53,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:53,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:48:53,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:54,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:54,008 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:54,016 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:48:54,149 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:48:54,149 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:54,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:54,398 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:54,398 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-30 10:48:54,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 10:48:54,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 10:48:54,399 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:54,399 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-09-30 10:48:55,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:55,478 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 10:48:55,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 10:48:55,478 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-09-30 10:48:55,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:55,479 INFO L225 Difference]: With dead ends: 105 [2018-09-30 10:48:55,479 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 10:48:55,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:55,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 10:48:55,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 10:48:55,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 10:48:55,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 10:48:55,481 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-30 10:48:55,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:55,481 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 10:48:55,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 10:48:55,482 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 10:48:55,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 10:48:55,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:55,482 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-30 10:48:55,482 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:55,482 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:55,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1807142068, now seen corresponding path program 99 times [2018-09-30 10:48:55,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:55,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:55,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:55,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:55,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:56,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:56,356 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:56,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:56,363 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:48:56,648 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-30 10:48:56,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:56,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:56,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:56,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 10:48:56,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 10:48:56,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 10:48:56,910 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:56,911 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-09-30 10:48:58,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:48:58,070 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-30 10:48:58,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 10:48:58,070 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-09-30 10:48:58,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:48:58,071 INFO L225 Difference]: With dead ends: 106 [2018-09-30 10:48:58,071 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 10:48:58,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:48:58,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 10:48:58,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 10:48:58,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 10:48:58,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-30 10:48:58,074 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-30 10:48:58,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:48:58,074 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-30 10:48:58,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 10:48:58,074 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-30 10:48:58,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-30 10:48:58,075 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:48:58,075 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-30 10:48:58,075 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:48:58,075 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:48:58,075 INFO L82 PathProgramCache]: Analyzing trace with hash -186827453, now seen corresponding path program 100 times [2018-09-30 10:48:58,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:48:58,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:48:58,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:58,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:48:58,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:48:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:48:58,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:58,756 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:48:58,756 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:48:58,764 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:48:58,907 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:48:58,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:48:58,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:48:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:48:59,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:48:59,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-30 10:48:59,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 10:48:59,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 10:48:59,175 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:48:59,175 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-09-30 10:49:00,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:00,377 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 10:49:00,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 10:49:00,378 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-09-30 10:49:00,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:00,378 INFO L225 Difference]: With dead ends: 107 [2018-09-30 10:49:00,379 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 10:49:00,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:00,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 10:49:00,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 10:49:00,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 10:49:00,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-30 10:49:00,389 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-30 10:49:00,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:00,389 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-30 10:49:00,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 10:49:00,389 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-30 10:49:00,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 10:49:00,390 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:00,390 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-30 10:49:00,390 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:00,390 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:00,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1496681940, now seen corresponding path program 101 times [2018-09-30 10:49:00,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:00,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:00,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:00,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:00,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:01,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:01,235 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:01,242 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:49:01,548 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-30 10:49:01,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:01,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:01,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:01,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:01,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-30 10:49:01,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 10:49:01,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 10:49:01,863 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:01,863 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-09-30 10:49:03,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:03,005 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-30 10:49:03,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 10:49:03,005 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-09-30 10:49:03,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:03,006 INFO L225 Difference]: With dead ends: 108 [2018-09-30 10:49:03,007 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 10:49:03,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:03,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 10:49:03,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 10:49:03,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 10:49:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-30 10:49:03,015 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-30 10:49:03,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:03,016 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-30 10:49:03,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 10:49:03,016 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-30 10:49:03,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-30 10:49:03,016 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:03,017 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-30 10:49:03,017 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:03,017 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:03,017 INFO L82 PathProgramCache]: Analyzing trace with hash 847501923, now seen corresponding path program 102 times [2018-09-30 10:49:03,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:03,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:03,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:03,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:03,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:03,781 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:03,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:03,788 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:49:04,076 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-30 10:49:04,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:04,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:04,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:04,348 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:04,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-30 10:49:04,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-30 10:49:04,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-30 10:49:04,351 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:04,351 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-09-30 10:49:05,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:05,556 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 10:49:05,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 10:49:05,557 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-09-30 10:49:05,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:05,557 INFO L225 Difference]: With dead ends: 109 [2018-09-30 10:49:05,557 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 10:49:05,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:05,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 10:49:05,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 10:49:05,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 10:49:05,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-30 10:49:05,560 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-30 10:49:05,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:05,560 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-30 10:49:05,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-30 10:49:05,561 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-30 10:49:05,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 10:49:05,561 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:05,561 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-30 10:49:05,561 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:05,562 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:05,562 INFO L82 PathProgramCache]: Analyzing trace with hash 502757644, now seen corresponding path program 103 times [2018-09-30 10:49:05,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:05,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:05,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:05,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:05,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:06,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:06,459 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:06,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:06,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:06,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:07,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:07,058 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-30 10:49:07,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 10:49:07,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 10:49:07,060 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:07,060 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-09-30 10:49:07,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:07,957 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-30 10:49:07,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 10:49:07,957 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-09-30 10:49:07,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:07,957 INFO L225 Difference]: With dead ends: 110 [2018-09-30 10:49:07,958 INFO L226 Difference]: Without dead ends: 108 [2018-09-30 10:49:07,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:07,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-30 10:49:07,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-30 10:49:07,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 10:49:07,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-30 10:49:07,960 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-30 10:49:07,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:07,960 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-30 10:49:07,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 10:49:07,960 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-30 10:49:07,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 10:49:07,961 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:07,961 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-30 10:49:07,961 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:07,961 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:07,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1594380413, now seen corresponding path program 104 times [2018-09-30 10:49:07,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:07,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:07,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:07,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:07,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:07,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:08,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:08,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:08,737 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:49:08,888 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:49:08,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:08,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:09,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:09,165 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:09,165 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-30 10:49:09,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 10:49:09,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 10:49:09,166 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:09,166 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-09-30 10:49:10,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:10,229 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 10:49:10,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 10:49:10,229 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-09-30 10:49:10,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:10,229 INFO L225 Difference]: With dead ends: 111 [2018-09-30 10:49:10,229 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 10:49:10,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:10,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 10:49:10,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 10:49:10,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 10:49:10,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-30 10:49:10,232 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-30 10:49:10,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:10,232 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-30 10:49:10,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 10:49:10,232 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-30 10:49:10,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 10:49:10,233 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:10,233 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-30 10:49:10,233 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:10,233 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:10,233 INFO L82 PathProgramCache]: Analyzing trace with hash 2113816556, now seen corresponding path program 105 times [2018-09-30 10:49:10,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:10,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:10,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:10,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:10,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:10,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:10,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:10,992 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:49:11,314 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-30 10:49:11,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:11,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:11,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:11,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-30 10:49:11,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 10:49:11,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 10:49:11,675 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:11,676 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-09-30 10:49:12,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:12,940 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-30 10:49:12,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 10:49:12,940 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-09-30 10:49:12,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:12,941 INFO L225 Difference]: With dead ends: 112 [2018-09-30 10:49:12,941 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 10:49:12,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:12,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 10:49:12,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-30 10:49:12,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 10:49:12,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-30 10:49:12,943 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-30 10:49:12,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:12,944 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-30 10:49:12,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 10:49:12,944 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-30 10:49:12,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-30 10:49:12,944 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:12,945 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-30 10:49:12,945 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:12,945 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:12,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1103805603, now seen corresponding path program 106 times [2018-09-30 10:49:12,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:12,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:12,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:12,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:12,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:13,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:13,697 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:13,697 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:13,704 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:49:13,856 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:49:13,856 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:13,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:14,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:14,143 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:14,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-30 10:49:14,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-30 10:49:14,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-30 10:49:14,145 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:14,145 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-09-30 10:49:15,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:15,430 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 10:49:15,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 10:49:15,430 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-09-30 10:49:15,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:15,430 INFO L225 Difference]: With dead ends: 113 [2018-09-30 10:49:15,430 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 10:49:15,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:15,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 10:49:15,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 10:49:15,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 10:49:15,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-30 10:49:15,433 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-30 10:49:15,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:15,433 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-30 10:49:15,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-30 10:49:15,433 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-30 10:49:15,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 10:49:15,434 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:15,434 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-30 10:49:15,434 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:15,434 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:15,434 INFO L82 PathProgramCache]: Analyzing trace with hash -141762868, now seen corresponding path program 107 times [2018-09-30 10:49:15,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:15,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:15,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:15,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:15,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:16,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:16,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:16,199 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:49:16,515 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-30 10:49:16,515 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:16,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:16,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:16,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-30 10:49:16,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 10:49:16,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 10:49:16,843 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:16,843 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-09-30 10:49:18,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:18,242 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-09-30 10:49:18,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 10:49:18,242 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-09-30 10:49:18,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:18,243 INFO L225 Difference]: With dead ends: 114 [2018-09-30 10:49:18,243 INFO L226 Difference]: Without dead ends: 112 [2018-09-30 10:49:18,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:18,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-30 10:49:18,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-30 10:49:18,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 10:49:18,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-30 10:49:18,245 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-09-30 10:49:18,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:18,245 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-30 10:49:18,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 10:49:18,245 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-30 10:49:18,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 10:49:18,245 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:18,246 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-09-30 10:49:18,246 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:18,246 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:18,246 INFO L82 PathProgramCache]: Analyzing trace with hash -99679805, now seen corresponding path program 108 times [2018-09-30 10:49:18,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:18,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:18,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:18,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:18,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:19,032 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:19,032 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:19,040 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:49:19,354 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 10:49:19,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:19,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:19,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:19,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-30 10:49:19,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-30 10:49:19,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-30 10:49:19,637 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:19,637 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-09-30 10:49:20,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:20,689 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 10:49:20,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-30 10:49:20,689 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-09-30 10:49:20,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:20,690 INFO L225 Difference]: With dead ends: 115 [2018-09-30 10:49:20,690 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 10:49:20,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:20,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 10:49:20,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 10:49:20,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 10:49:20,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-30 10:49:20,692 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-09-30 10:49:20,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:20,692 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-30 10:49:20,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-30 10:49:20,692 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-30 10:49:20,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 10:49:20,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:20,693 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-09-30 10:49:20,693 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:20,693 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:20,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1204895148, now seen corresponding path program 109 times [2018-09-30 10:49:20,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:20,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:20,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:20,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:20,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:21,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:21,521 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:21,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:21,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:21,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:21,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-30 10:49:21,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 10:49:21,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 10:49:21,995 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:21,995 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-09-30 10:49:23,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:23,347 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-09-30 10:49:23,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-30 10:49:23,348 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-09-30 10:49:23,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:23,348 INFO L225 Difference]: With dead ends: 116 [2018-09-30 10:49:23,349 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 10:49:23,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:23,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 10:49:23,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-30 10:49:23,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-30 10:49:23,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-30 10:49:23,351 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-09-30 10:49:23,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:23,352 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-30 10:49:23,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 10:49:23,352 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-30 10:49:23,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 10:49:23,352 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:23,352 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-09-30 10:49:23,353 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:23,353 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:23,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1302954269, now seen corresponding path program 110 times [2018-09-30 10:49:23,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:23,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:23,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:23,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:23,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:24,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:24,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:24,159 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:49:24,311 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:49:24,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:24,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:24,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:24,593 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-30 10:49:24,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 10:49:24,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 10:49:24,595 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:24,595 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-09-30 10:49:25,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:25,968 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 10:49:25,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 10:49:25,968 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-09-30 10:49:25,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:25,969 INFO L225 Difference]: With dead ends: 117 [2018-09-30 10:49:25,969 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 10:49:25,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:25,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 10:49:25,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 10:49:25,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 10:49:25,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-30 10:49:25,971 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-09-30 10:49:25,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:25,972 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-30 10:49:25,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 10:49:25,972 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-30 10:49:25,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 10:49:25,972 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:25,973 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-09-30 10:49:25,973 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:25,973 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:25,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1736874868, now seen corresponding path program 111 times [2018-09-30 10:49:25,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:25,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:25,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:25,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:25,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:26,919 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:26,919 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:26,925 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:49:27,296 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-09-30 10:49:27,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:27,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:27,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:27,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-30 10:49:27,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 10:49:27,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 10:49:27,573 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:27,573 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 114 states. [2018-09-30 10:49:28,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:28,872 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-09-30 10:49:28,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-30 10:49:28,873 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-09-30 10:49:28,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:28,873 INFO L225 Difference]: With dead ends: 118 [2018-09-30 10:49:28,873 INFO L226 Difference]: Without dead ends: 116 [2018-09-30 10:49:28,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:28,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-30 10:49:28,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-30 10:49:28,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-30 10:49:28,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-30 10:49:28,876 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-09-30 10:49:28,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:28,876 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-30 10:49:28,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 10:49:28,876 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-30 10:49:28,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-30 10:49:28,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:28,877 INFO L375 BasicCegarLoop]: trace histogram [112, 1, 1, 1] [2018-09-30 10:49:28,877 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:28,877 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:28,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1991455747, now seen corresponding path program 112 times [2018-09-30 10:49:28,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:28,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:28,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:28,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:28,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:29,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:29,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:29,675 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:29,682 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:49:29,836 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:49:29,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:29,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:30,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:30,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:30,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-09-30 10:49:30,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-09-30 10:49:30,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-09-30 10:49:30,186 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:30,186 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 115 states. [2018-09-30 10:49:31,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:31,356 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-30 10:49:31,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-30 10:49:31,356 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 115 [2018-09-30 10:49:31,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:31,357 INFO L225 Difference]: With dead ends: 119 [2018-09-30 10:49:31,357 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 10:49:31,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:31,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 10:49:31,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 10:49:31,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 10:49:31,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-30 10:49:31,359 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2018-09-30 10:49:31,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:31,359 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-30 10:49:31,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-09-30 10:49:31,359 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-30 10:49:31,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 10:49:31,360 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:31,360 INFO L375 BasicCegarLoop]: trace histogram [113, 1, 1, 1] [2018-09-30 10:49:31,360 INFO L423 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:31,360 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:31,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1605587820, now seen corresponding path program 113 times [2018-09-30 10:49:31,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:31,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:31,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:31,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:31,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:32,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:32,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:32,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:32,406 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:49:32,734 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-09-30 10:49:32,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:32,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:33,029 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:33,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 115 [2018-09-30 10:49:33,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 10:49:33,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 10:49:33,031 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:33,031 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 116 states. [2018-09-30 10:49:34,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:34,170 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-09-30 10:49:34,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-30 10:49:34,170 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 116 [2018-09-30 10:49:34,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:34,170 INFO L225 Difference]: With dead ends: 120 [2018-09-30 10:49:34,170 INFO L226 Difference]: Without dead ends: 118 [2018-09-30 10:49:34,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:34,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-30 10:49:34,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-30 10:49:34,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-30 10:49:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-30 10:49:34,173 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2018-09-30 10:49:34,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:34,173 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-30 10:49:34,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 10:49:34,173 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-30 10:49:34,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-30 10:49:34,173 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:34,174 INFO L375 BasicCegarLoop]: trace histogram [114, 1, 1, 1] [2018-09-30 10:49:34,174 INFO L423 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:34,174 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:34,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1766383325, now seen corresponding path program 114 times [2018-09-30 10:49:34,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:34,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:34,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:34,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:34,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:34,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:34,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:34,993 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:49:35,342 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2018-09-30 10:49:35,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:35,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:35,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:35,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 116 [2018-09-30 10:49:35,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-09-30 10:49:35,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-09-30 10:49:35,640 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:35,640 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 117 states. [2018-09-30 10:49:37,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:37,116 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 10:49:37,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-30 10:49:37,116 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 117 [2018-09-30 10:49:37,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:37,117 INFO L225 Difference]: With dead ends: 121 [2018-09-30 10:49:37,117 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 10:49:37,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:37,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 10:49:37,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 10:49:37,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 10:49:37,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-30 10:49:37,121 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2018-09-30 10:49:37,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:37,122 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-30 10:49:37,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-09-30 10:49:37,122 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-30 10:49:37,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 10:49:37,122 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:37,122 INFO L375 BasicCegarLoop]: trace histogram [115, 1, 1, 1] [2018-09-30 10:49:37,122 INFO L423 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:37,123 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:37,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1076693580, now seen corresponding path program 115 times [2018-09-30 10:49:37,123 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:37,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:37,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:37,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:37,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:37,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:37,960 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:37,960 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:37,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:38,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:38,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:38,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:38,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 117 [2018-09-30 10:49:38,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 10:49:38,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 10:49:38,418 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:38,418 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 118 states. [2018-09-30 10:49:39,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:39,858 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-09-30 10:49:39,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-30 10:49:39,859 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 118 [2018-09-30 10:49:39,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:39,859 INFO L225 Difference]: With dead ends: 122 [2018-09-30 10:49:39,859 INFO L226 Difference]: Without dead ends: 120 [2018-09-30 10:49:39,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:39,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-30 10:49:39,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-30 10:49:39,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-30 10:49:39,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-30 10:49:39,862 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2018-09-30 10:49:39,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:39,862 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-30 10:49:39,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 10:49:39,862 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-30 10:49:39,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-30 10:49:39,863 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:39,863 INFO L375 BasicCegarLoop]: trace histogram [116, 1, 1, 1] [2018-09-30 10:49:39,863 INFO L423 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:39,863 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:39,863 INFO L82 PathProgramCache]: Analyzing trace with hash -982235581, now seen corresponding path program 116 times [2018-09-30 10:49:39,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:39,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:39,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:39,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:39,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:39,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:40,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:40,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:40,802 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:49:40,966 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:49:40,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:40,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:41,274 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:41,274 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 118 [2018-09-30 10:49:41,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-30 10:49:41,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-30 10:49:41,276 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:41,276 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 119 states. [2018-09-30 10:49:42,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:42,498 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-30 10:49:42,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-30 10:49:42,499 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 119 [2018-09-30 10:49:42,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:42,499 INFO L225 Difference]: With dead ends: 123 [2018-09-30 10:49:42,499 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 10:49:42,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:42,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 10:49:42,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 10:49:42,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 10:49:42,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-30 10:49:42,501 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2018-09-30 10:49:42,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:42,502 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-30 10:49:42,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-30 10:49:42,502 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-30 10:49:42,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-30 10:49:42,502 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:42,502 INFO L375 BasicCegarLoop]: trace histogram [117, 1, 1, 1] [2018-09-30 10:49:42,502 INFO L423 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:42,502 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:42,503 INFO L82 PathProgramCache]: Analyzing trace with hash -384530132, now seen corresponding path program 117 times [2018-09-30 10:49:42,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:42,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:42,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:42,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:42,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:43,396 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:43,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:43,427 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:49:43,806 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-09-30 10:49:43,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:43,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:44,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:44,119 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:44,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 119 [2018-09-30 10:49:44,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 10:49:44,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 10:49:44,121 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:44,121 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 120 states. [2018-09-30 10:49:45,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:45,438 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-09-30 10:49:45,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-30 10:49:45,438 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 120 [2018-09-30 10:49:45,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:45,439 INFO L225 Difference]: With dead ends: 124 [2018-09-30 10:49:45,439 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 10:49:45,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:45,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 10:49:45,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-30 10:49:45,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-30 10:49:45,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-30 10:49:45,441 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 120 [2018-09-30 10:49:45,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:45,442 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-30 10:49:45,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 10:49:45,442 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-30 10:49:45,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-30 10:49:45,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:45,442 INFO L375 BasicCegarLoop]: trace histogram [118, 1, 1, 1] [2018-09-30 10:49:45,442 INFO L423 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:45,442 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:45,442 INFO L82 PathProgramCache]: Analyzing trace with hash 964469603, now seen corresponding path program 118 times [2018-09-30 10:49:45,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:45,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:45,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:45,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:45,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:46,332 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:46,332 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:46,340 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:49:46,513 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:49:46,513 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:46,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:46,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:46,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 120 [2018-09-30 10:49:46,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-09-30 10:49:46,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-09-30 10:49:46,829 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:46,829 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 121 states. [2018-09-30 10:49:48,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:48,253 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 10:49:48,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 10:49:48,254 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 121 [2018-09-30 10:49:48,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:48,254 INFO L225 Difference]: With dead ends: 125 [2018-09-30 10:49:48,254 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 10:49:48,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:48,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 10:49:48,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 10:49:48,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 10:49:48,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-30 10:49:48,256 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 121 [2018-09-30 10:49:48,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:48,257 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-30 10:49:48,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-09-30 10:49:48,257 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-30 10:49:48,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 10:49:48,257 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:48,257 INFO L375 BasicCegarLoop]: trace histogram [119, 1, 1, 1] [2018-09-30 10:49:48,258 INFO L423 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:48,258 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:48,258 INFO L82 PathProgramCache]: Analyzing trace with hash -166211572, now seen corresponding path program 119 times [2018-09-30 10:49:48,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:48,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:48,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:48,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:48,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:49,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:49,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:49,207 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:49:49,573 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-30 10:49:49,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:49,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:49,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:49,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:49,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 121 [2018-09-30 10:49:49,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 10:49:49,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 10:49:49,907 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:49,907 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 122 states. [2018-09-30 10:49:51,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:51,181 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-09-30 10:49:51,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-30 10:49:51,182 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 122 [2018-09-30 10:49:51,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:51,182 INFO L225 Difference]: With dead ends: 126 [2018-09-30 10:49:51,182 INFO L226 Difference]: Without dead ends: 124 [2018-09-30 10:49:51,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:51,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-30 10:49:51,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-30 10:49:51,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-30 10:49:51,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-30 10:49:51,185 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 122 [2018-09-30 10:49:51,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:51,185 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-30 10:49:51,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 10:49:51,186 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-30 10:49:51,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-30 10:49:51,186 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:51,186 INFO L375 BasicCegarLoop]: trace histogram [120, 1, 1, 1] [2018-09-30 10:49:51,187 INFO L423 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:51,187 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:51,187 INFO L82 PathProgramCache]: Analyzing trace with hash -857589629, now seen corresponding path program 120 times [2018-09-30 10:49:51,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:51,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:51,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:51,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:51,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:52,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:52,134 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:52,142 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:49:52,540 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 10:49:52,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:52,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:52,849 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:52,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 122 [2018-09-30 10:49:52,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-09-30 10:49:52,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-09-30 10:49:52,851 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:52,851 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 123 states. [2018-09-30 10:49:54,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:54,450 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-30 10:49:54,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-09-30 10:49:54,450 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 123 [2018-09-30 10:49:54,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:54,451 INFO L225 Difference]: With dead ends: 127 [2018-09-30 10:49:54,451 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 10:49:54,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:54,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 10:49:54,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-30 10:49:54,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 10:49:54,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-30 10:49:54,453 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 123 [2018-09-30 10:49:54,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:54,454 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-30 10:49:54,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-09-30 10:49:54,454 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-30 10:49:54,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-30 10:49:54,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:54,454 INFO L375 BasicCegarLoop]: trace histogram [121, 1, 1, 1] [2018-09-30 10:49:54,454 INFO L423 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:54,454 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:54,454 INFO L82 PathProgramCache]: Analyzing trace with hash -815472916, now seen corresponding path program 121 times [2018-09-30 10:49:54,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:54,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:54,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:54,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:49:54,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:54,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:55,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:55,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:55,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:55,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:55,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:56,006 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:56,006 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 123 [2018-09-30 10:49:56,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 10:49:56,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 10:49:56,009 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:56,009 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 124 states. [2018-09-30 10:49:57,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:49:57,627 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-09-30 10:49:57,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-09-30 10:49:57,627 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 124 [2018-09-30 10:49:57,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:49:57,628 INFO L225 Difference]: With dead ends: 128 [2018-09-30 10:49:57,628 INFO L226 Difference]: Without dead ends: 126 [2018-09-30 10:49:57,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:49:57,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-30 10:49:57,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-30 10:49:57,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-30 10:49:57,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-30 10:49:57,631 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 124 [2018-09-30 10:49:57,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:49:57,631 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-30 10:49:57,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 10:49:57,631 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-30 10:49:57,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-30 10:49:57,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:49:57,632 INFO L375 BasicCegarLoop]: trace histogram [122, 1, 1, 1] [2018-09-30 10:49:57,632 INFO L423 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:49:57,632 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:49:57,633 INFO L82 PathProgramCache]: Analyzing trace with hash 490145187, now seen corresponding path program 122 times [2018-09-30 10:49:57,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:49:57,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:49:57,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:57,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:49:57,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:49:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:49:58,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:58,578 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:49:58,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:49:58,586 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:49:58,764 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:49:58,764 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:49:58,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:49:59,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:49:59,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:49:59,126 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 124 [2018-09-30 10:49:59,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-30 10:49:59,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-30 10:49:59,127 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:49:59,127 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 125 states. [2018-09-30 10:50:00,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:00,661 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 10:50:00,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-30 10:50:00,661 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 125 [2018-09-30 10:50:00,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:00,662 INFO L225 Difference]: With dead ends: 129 [2018-09-30 10:50:00,662 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 10:50:00,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:00,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 10:50:00,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-30 10:50:00,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 10:50:00,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-30 10:50:00,664 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 125 [2018-09-30 10:50:00,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:00,664 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-30 10:50:00,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-30 10:50:00,665 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-30 10:50:00,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-30 10:50:00,665 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:00,665 INFO L375 BasicCegarLoop]: trace histogram [123, 1, 1, 1] [2018-09-30 10:50:00,665 INFO L423 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:00,666 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:00,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1985366580, now seen corresponding path program 123 times [2018-09-30 10:50:00,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:00,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:00,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:00,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:00,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:01,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:01,629 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:01,629 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:01,636 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:50:02,039 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-09-30 10:50:02,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:02,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:02,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:02,366 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 125 [2018-09-30 10:50:02,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 10:50:02,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 10:50:02,368 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:02,368 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 126 states. [2018-09-30 10:50:04,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:04,066 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-09-30 10:50:04,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-09-30 10:50:04,067 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 126 [2018-09-30 10:50:04,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:04,067 INFO L225 Difference]: With dead ends: 130 [2018-09-30 10:50:04,067 INFO L226 Difference]: Without dead ends: 128 [2018-09-30 10:50:04,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:04,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-30 10:50:04,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-30 10:50:04,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-30 10:50:04,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-30 10:50:04,069 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 126 [2018-09-30 10:50:04,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:04,070 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-30 10:50:04,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 10:50:04,070 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-30 10:50:04,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-30 10:50:04,070 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:04,070 INFO L375 BasicCegarLoop]: trace histogram [124, 1, 1, 1] [2018-09-30 10:50:04,070 INFO L423 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:04,070 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:04,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1416820029, now seen corresponding path program 124 times [2018-09-30 10:50:04,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:04,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:04,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:04,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:04,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:05,037 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:05,037 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:05,045 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:50:05,230 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:50:05,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:05,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:05,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:05,551 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 126 [2018-09-30 10:50:05,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-09-30 10:50:05,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-09-30 10:50:05,553 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:05,553 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 127 states. [2018-09-30 10:50:07,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:07,222 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-30 10:50:07,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-30 10:50:07,222 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 127 [2018-09-30 10:50:07,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:07,222 INFO L225 Difference]: With dead ends: 131 [2018-09-30 10:50:07,222 INFO L226 Difference]: Without dead ends: 129 [2018-09-30 10:50:07,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:07,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-30 10:50:07,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-30 10:50:07,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 10:50:07,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-30 10:50:07,225 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 127 [2018-09-30 10:50:07,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:07,225 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-30 10:50:07,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-09-30 10:50:07,225 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-30 10:50:07,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 10:50:07,226 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:07,226 INFO L375 BasicCegarLoop]: trace histogram [125, 1, 1, 1] [2018-09-30 10:50:07,226 INFO L423 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:07,227 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:07,227 INFO L82 PathProgramCache]: Analyzing trace with hash -971746132, now seen corresponding path program 125 times [2018-09-30 10:50:07,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:07,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:07,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:07,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:07,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:08,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:08,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:08,458 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:50:08,855 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-09-30 10:50:08,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:08,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:09,176 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:09,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 127 [2018-09-30 10:50:09,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 10:50:09,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 10:50:09,178 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:09,178 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 128 states. [2018-09-30 10:50:10,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:10,765 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-09-30 10:50:10,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-30 10:50:10,766 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 128 [2018-09-30 10:50:10,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:10,766 INFO L225 Difference]: With dead ends: 132 [2018-09-30 10:50:10,766 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 10:50:10,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:10,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 10:50:10,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-30 10:50:10,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-30 10:50:10,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-30 10:50:10,769 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 128 [2018-09-30 10:50:10,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:10,769 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-30 10:50:10,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 10:50:10,769 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-30 10:50:10,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-30 10:50:10,769 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:10,770 INFO L375 BasicCegarLoop]: trace histogram [126, 1, 1, 1] [2018-09-30 10:50:10,770 INFO L423 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:10,770 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:10,770 INFO L82 PathProgramCache]: Analyzing trace with hash -59357213, now seen corresponding path program 126 times [2018-09-30 10:50:10,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:10,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:10,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:10,771 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:10,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:11,801 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:11,801 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:11,808 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:50:12,224 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2018-09-30 10:50:12,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:12,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:12,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:12,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 128 [2018-09-30 10:50:12,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-09-30 10:50:12,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-09-30 10:50:12,550 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:12,550 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 129 states. [2018-09-30 10:50:14,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:14,223 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 10:50:14,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-30 10:50:14,224 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 129 [2018-09-30 10:50:14,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:14,224 INFO L225 Difference]: With dead ends: 133 [2018-09-30 10:50:14,224 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 10:50:14,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:14,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 10:50:14,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 10:50:14,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 10:50:14,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-30 10:50:14,227 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 129 [2018-09-30 10:50:14,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:14,227 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-30 10:50:14,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-09-30 10:50:14,227 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-30 10:50:14,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 10:50:14,228 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:14,228 INFO L375 BasicCegarLoop]: trace histogram [127, 1, 1, 1] [2018-09-30 10:50:14,228 INFO L423 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:14,228 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:14,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1840071796, now seen corresponding path program 127 times [2018-09-30 10:50:14,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:14,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:14,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:14,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:14,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:15,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:15,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:15,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:15,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:15,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:15,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:15,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:15,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 129 [2018-09-30 10:50:15,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 10:50:15,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 10:50:15,821 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:15,821 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 130 states. [2018-09-30 10:50:17,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:17,462 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-09-30 10:50:17,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-09-30 10:50:17,463 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 130 [2018-09-30 10:50:17,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:17,463 INFO L225 Difference]: With dead ends: 134 [2018-09-30 10:50:17,463 INFO L226 Difference]: Without dead ends: 132 [2018-09-30 10:50:17,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:17,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-30 10:50:17,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-30 10:50:17,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-30 10:50:17,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-30 10:50:17,467 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 130 [2018-09-30 10:50:17,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:17,467 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-30 10:50:17,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 10:50:17,467 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-30 10:50:17,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-30 10:50:17,468 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:17,468 INFO L375 BasicCegarLoop]: trace histogram [128, 1, 1, 1] [2018-09-30 10:50:17,468 INFO L423 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:17,468 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:17,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1207649021, now seen corresponding path program 128 times [2018-09-30 10:50:17,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:17,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:17,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:17,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:17,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:18,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:18,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:18,765 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:50:18,944 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:50:18,944 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:18,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:19,291 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:19,291 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 130 [2018-09-30 10:50:19,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-30 10:50:19,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-30 10:50:19,294 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:19,294 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 131 states. [2018-09-30 10:50:21,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:21,008 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-30 10:50:21,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-30 10:50:21,009 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 131 [2018-09-30 10:50:21,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:21,009 INFO L225 Difference]: With dead ends: 135 [2018-09-30 10:50:21,009 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 10:50:21,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:21,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 10:50:21,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 10:50:21,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 10:50:21,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-30 10:50:21,012 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 131 [2018-09-30 10:50:21,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:21,013 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-30 10:50:21,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-30 10:50:21,013 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-30 10:50:21,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 10:50:21,013 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:21,013 INFO L375 BasicCegarLoop]: trace histogram [129, 1, 1, 1] [2018-09-30 10:50:21,014 INFO L423 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:21,014 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:21,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1217587820, now seen corresponding path program 129 times [2018-09-30 10:50:21,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:21,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:21,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:21,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:21,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:22,147 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:22,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:22,155 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:50:22,598 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2018-09-30 10:50:22,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:22,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:22,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:22,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 131 [2018-09-30 10:50:22,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 10:50:22,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 10:50:22,968 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:22,969 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 132 states. [2018-09-30 10:50:24,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:24,903 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-09-30 10:50:24,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-09-30 10:50:24,903 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 132 [2018-09-30 10:50:24,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:24,904 INFO L225 Difference]: With dead ends: 136 [2018-09-30 10:50:24,904 INFO L226 Difference]: Without dead ends: 134 [2018-09-30 10:50:24,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:24,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-30 10:50:24,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-30 10:50:24,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-30 10:50:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-30 10:50:24,907 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 132 [2018-09-30 10:50:24,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:24,907 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-30 10:50:24,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 10:50:24,907 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-30 10:50:24,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-30 10:50:24,908 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:24,908 INFO L375 BasicCegarLoop]: trace histogram [130, 1, 1, 1] [2018-09-30 10:50:24,908 INFO L423 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:24,908 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:24,908 INFO L82 PathProgramCache]: Analyzing trace with hash -909481437, now seen corresponding path program 130 times [2018-09-30 10:50:24,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:24,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:24,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:24,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:24,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:26,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:26,035 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:26,042 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:50:26,230 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:50:26,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:26,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:26,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:26,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 132 [2018-09-30 10:50:26,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-09-30 10:50:26,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-09-30 10:50:26,576 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:26,576 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 133 states. [2018-09-30 10:50:28,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:28,456 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 10:50:28,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-09-30 10:50:28,457 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 133 [2018-09-30 10:50:28,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:28,457 INFO L225 Difference]: With dead ends: 137 [2018-09-30 10:50:28,457 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 10:50:28,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:28,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 10:50:28,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-30 10:50:28,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 10:50:28,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-30 10:50:28,460 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 133 [2018-09-30 10:50:28,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:28,460 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-30 10:50:28,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-09-30 10:50:28,460 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-30 10:50:28,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 10:50:28,460 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:28,460 INFO L375 BasicCegarLoop]: trace histogram [131, 1, 1, 1] [2018-09-30 10:50:28,460 INFO L423 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:28,461 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:28,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1870848332, now seen corresponding path program 131 times [2018-09-30 10:50:28,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:28,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:28,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:28,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:28,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:29,607 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:29,607 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:29,615 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:50:30,038 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-30 10:50:30,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:30,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:30,390 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:30,391 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 133 [2018-09-30 10:50:30,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 10:50:30,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 10:50:30,393 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:30,393 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 134 states. [2018-09-30 10:50:32,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:32,117 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-09-30 10:50:32,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-09-30 10:50:32,118 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 134 [2018-09-30 10:50:32,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:32,118 INFO L225 Difference]: With dead ends: 138 [2018-09-30 10:50:32,118 INFO L226 Difference]: Without dead ends: 136 [2018-09-30 10:50:32,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:32,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-30 10:50:32,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-30 10:50:32,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 10:50:32,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-30 10:50:32,121 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 134 [2018-09-30 10:50:32,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:32,121 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-30 10:50:32,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 10:50:32,121 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-30 10:50:32,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-30 10:50:32,121 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:32,121 INFO L375 BasicCegarLoop]: trace histogram [132, 1, 1, 1] [2018-09-30 10:50:32,121 INFO L423 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:32,122 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:32,122 INFO L82 PathProgramCache]: Analyzing trace with hash -2133242045, now seen corresponding path program 132 times [2018-09-30 10:50:32,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:32,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:32,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:32,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:32,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:33,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:33,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:33,369 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:33,377 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:50:33,838 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 10:50:33,838 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:33,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:34,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:34,181 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:34,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 134 [2018-09-30 10:50:34,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-09-30 10:50:34,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-09-30 10:50:34,183 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:34,184 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 135 states. [2018-09-30 10:50:35,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:35,746 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-30 10:50:35,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-09-30 10:50:35,746 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 135 [2018-09-30 10:50:35,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:35,747 INFO L225 Difference]: With dead ends: 139 [2018-09-30 10:50:35,747 INFO L226 Difference]: Without dead ends: 137 [2018-09-30 10:50:35,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:35,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-30 10:50:35,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-30 10:50:35,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 10:50:35,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-30 10:50:35,749 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 135 [2018-09-30 10:50:35,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:35,749 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-30 10:50:35,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-09-30 10:50:35,749 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-30 10:50:35,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-30 10:50:35,750 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:35,750 INFO L375 BasicCegarLoop]: trace histogram [133, 1, 1, 1] [2018-09-30 10:50:35,750 INFO L423 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:35,750 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:35,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1705992148, now seen corresponding path program 133 times [2018-09-30 10:50:35,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:35,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:35,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:35,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:35,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:36,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:36,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:36,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:37,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:37,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:37,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:37,495 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:37,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135] total 135 [2018-09-30 10:50:37,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-30 10:50:37,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-30 10:50:37,497 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:37,497 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 136 states. [2018-09-30 10:50:39,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:39,335 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2018-09-30 10:50:39,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-09-30 10:50:39,335 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 136 [2018-09-30 10:50:39,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:39,335 INFO L225 Difference]: With dead ends: 140 [2018-09-30 10:50:39,335 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 10:50:39,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:39,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 10:50:39,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-30 10:50:39,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-30 10:50:39,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-30 10:50:39,338 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 136 [2018-09-30 10:50:39,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:39,338 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-30 10:50:39,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-30 10:50:39,338 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-30 10:50:39,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-30 10:50:39,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:39,338 INFO L375 BasicCegarLoop]: trace histogram [134, 1, 1, 1] [2018-09-30 10:50:39,339 INFO L423 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:39,339 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:39,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1346147229, now seen corresponding path program 134 times [2018-09-30 10:50:39,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:39,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:39,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:39,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:50:39,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:39,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:40,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:40,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:40,518 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:50:40,715 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:50:40,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:40,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:41,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:41,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136] total 136 [2018-09-30 10:50:41,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-30 10:50:41,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-30 10:50:41,075 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:41,075 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 137 states. [2018-09-30 10:50:42,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:42,927 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 10:50:42,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-30 10:50:42,927 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 137 [2018-09-30 10:50:42,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:42,928 INFO L225 Difference]: With dead ends: 141 [2018-09-30 10:50:42,928 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 10:50:42,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:42,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 10:50:42,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 10:50:42,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 10:50:42,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-30 10:50:42,930 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 137 [2018-09-30 10:50:42,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:42,930 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-30 10:50:42,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-30 10:50:42,931 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-30 10:50:42,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 10:50:42,931 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:42,931 INFO L375 BasicCegarLoop]: trace histogram [135, 1, 1, 1] [2018-09-30 10:50:42,931 INFO L423 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:42,932 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:42,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1219110668, now seen corresponding path program 135 times [2018-09-30 10:50:42,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:42,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:42,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:42,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:42,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:44,276 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:44,276 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:44,283 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:50:44,747 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2018-09-30 10:50:44,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:44,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:45,100 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:45,101 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137] total 137 [2018-09-30 10:50:45,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 10:50:45,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 10:50:45,103 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:45,103 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 138 states. [2018-09-30 10:50:46,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:46,733 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-09-30 10:50:46,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-09-30 10:50:46,733 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 138 [2018-09-30 10:50:46,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:46,734 INFO L225 Difference]: With dead ends: 142 [2018-09-30 10:50:46,734 INFO L226 Difference]: Without dead ends: 140 [2018-09-30 10:50:46,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:46,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-30 10:50:46,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-30 10:50:46,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-30 10:50:46,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-30 10:50:46,736 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 138 [2018-09-30 10:50:46,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:46,737 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-30 10:50:46,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 10:50:46,737 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-30 10:50:46,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-30 10:50:46,737 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:46,738 INFO L375 BasicCegarLoop]: trace histogram [136, 1, 1, 1] [2018-09-30 10:50:46,738 INFO L423 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:46,738 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:46,738 INFO L82 PathProgramCache]: Analyzing trace with hash -862273149, now seen corresponding path program 136 times [2018-09-30 10:50:46,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:46,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:46,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:46,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:46,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:47,910 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:47,910 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:47,917 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:50:48,110 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:50:48,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:48,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:48,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:48,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 138] total 138 [2018-09-30 10:50:48,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-09-30 10:50:48,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-09-30 10:50:48,467 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:48,467 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 139 states. [2018-09-30 10:50:50,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:50:50,736 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-30 10:50:50,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-09-30 10:50:50,736 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 139 [2018-09-30 10:50:50,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:50:50,737 INFO L225 Difference]: With dead ends: 143 [2018-09-30 10:50:50,737 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 10:50:50,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:50:50,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 10:50:50,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 10:50:50,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 10:50:50,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-30 10:50:50,739 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 139 [2018-09-30 10:50:50,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:50:50,739 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-30 10:50:50,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-09-30 10:50:50,739 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-30 10:50:50,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 10:50:50,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:50:50,740 INFO L375 BasicCegarLoop]: trace histogram [137, 1, 1, 1] [2018-09-30 10:50:50,740 INFO L423 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:50:50,740 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:50:50,740 INFO L82 PathProgramCache]: Analyzing trace with hash -960662036, now seen corresponding path program 137 times [2018-09-30 10:50:50,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:50:50,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:50:50,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:50,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:50:50,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:50:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:50:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:50:51,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:50:51,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:50:51,998 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:50:52,454 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2018-09-30 10:50:52,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:50:52,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:50:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. Received shutdown request... [2018-09-30 10:50:52,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:50:52,830 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139] total 139 [2018-09-30 10:50:52,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-30 10:50:52,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-30 10:50:52,833 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:50:52,833 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 140 states. [2018-09-30 10:50:52,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-09-30 10:50:52,834 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 10:50:52,840 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 10:50:52,840 INFO L202 PluginConnector]: Adding new model functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 10:50:52 BoogieIcfgContainer [2018-09-30 10:50:52,840 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 10:50:52,841 INFO L168 Benchmark]: Toolchain (without parser) took 242212.32 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 982.0 MB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -330.6 MB). Peak memory consumption was 651.4 MB. Max. memory is 7.1 GB. [2018-09-30 10:50:52,843 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:50:52,843 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.70 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:50:52,844 INFO L168 Benchmark]: Boogie Preprocessor took 22.82 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:50:52,844 INFO L168 Benchmark]: RCFGBuilder took 320.76 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 10:50:52,845 INFO L168 Benchmark]: TraceAbstraction took 241822.01 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 982.0 MB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -351.8 MB). Peak memory consumption was 630.2 MB. Max. memory is 7.1 GB. [2018-09-30 10:50:52,847 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 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.70 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.82 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 320.76 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 241822.01 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 982.0 MB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -351.8 MB). Peak memory consumption was 630.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 42]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 42). Cancelled while BasicCegarLoop was constructing difference of abstraction (141states) and FLOYD_HOARE automaton (currently 2 states, 140 states before enhancement), while ReachableStatesComputation was computing reachable states (1 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 241.7s OverallTime, 138 OverallIterations, 137 TraceHistogramMax, 100.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 411 SDtfs, 0 SDslu, 5940 SDs, 0 SdLazy, 15530 SolverSat, 220 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19456 GetRequests, 9865 SyntacticMatches, 0 SemanticMatches, 9591 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=141occurred in iteration=137, 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, 137 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 2.6s SsaConstructionTime, 20.4s SatisfiabilityAnalysisTime, 111.9s InterpolantComputationTime, 19731 NumberOfCodeBlocks, 19731 NumberOfCodeBlocksAsserted, 2713 NumberOfCheckSat, 19456 ConstructedInterpolants, 0 QuantifiedInterpolants, 5390410 SizeOfPredicates, 28496 NumberOfNonLiveVariables, 96722 ConjunctsInSsa, 38086 ConjunctsInUnsatCore, 275 InterpolantComputations, 1 PerfectInterpolantSequences, 0/875978 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/functions1.i_3.bplTransformedIcfg_BEv2_8.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_10-50-52-857.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/functions1.i_3.bplTransformedIcfg_BEv2_8.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_10-50-52-857.csv Completed graceful shutdown