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/20170304-DifficultPathPrograms/fragtest_simple.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f-m [2018-10-04 14:27:58,383 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 14:27:58,384 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 14:27:58,395 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 14:27:58,396 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 14:27:58,397 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 14:27:58,398 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 14:27:58,400 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 14:27:58,401 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 14:27:58,404 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 14:27:58,404 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 14:27:58,448 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 14:27:58,468 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 14:27:58,468 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 14:27:58,469 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 14:27:58,470 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 14:27:58,471 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 14:27:58,471 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 14:27:58,471 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 14:27:58,471 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 14:27:58,473 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 14:27:58,473 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 14:27:58,473 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 14:27:58,473 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 14:27:58,473 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 14:27:58,474 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 14:27:58,474 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 14:27:58,474 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 14:27:58,474 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 14:27:58,474 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 14:27:58,475 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 14:27:58,476 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 14:27:58,476 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 14:27:58,476 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 14:27:58,477 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 14:27:58,477 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 14:27:58,477 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 14:27:58,477 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 14:27:58,477 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 14:27:58,478 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 14:27:58,478 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 14:27:58,478 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 14:27:58,478 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 14:27:58,540 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 14:27:58,555 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 14:27:58,562 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 14:27:58,564 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 14:27:58,564 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 14:27:58,565 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/fragtest_simple.i_4.bpl [2018-10-04 14:27:58,565 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/fragtest_simple.i_4.bpl' [2018-10-04 14:27:58,639 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 14:27:58,641 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 14:27:58,642 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 14:27:58,642 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 14:27:58,642 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 14:27:58,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:27:58" (1/1) ... [2018-10-04 14:27:58,673 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:27:58" (1/1) ... [2018-10-04 14:27:58,680 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 14:27:58,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 14:27:58,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 14:27:58,681 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 14:27:58,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:27:58" (1/1) ... [2018-10-04 14:27:58,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:27:58" (1/1) ... [2018-10-04 14:27:58,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:27:58" (1/1) ... [2018-10-04 14:27:58,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:27:58" (1/1) ... [2018-10-04 14:27:58,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:27:58" (1/1) ... [2018-10-04 14:27:58,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:27:58" (1/1) ... [2018-10-04 14:27:58,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:27:58" (1/1) ... [2018-10-04 14:27:58,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 14:27:58,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 14:27:58,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 14:27:58,703 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 14:27:58,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:27:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 14:27:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 14:27:58,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 14:27:59,096 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 14:27:59,097 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:27:59 BoogieIcfgContainer [2018-10-04 14:27:59,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 14:27:59,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 14:27:59,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 14:27:59,102 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 14:27:59,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:27:58" (1/2) ... [2018-10-04 14:27:59,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58e11b50 and model type fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 02:27:59, skipping insertion in model container [2018-10-04 14:27:59,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:27:59" (2/2) ... [2018-10-04 14:27:59,106 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i_4.bpl [2018-10-04 14:27:59,116 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 14:27:59,124 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 14:27:59,175 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 14:27:59,176 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 14:27:59,176 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 14:27:59,176 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 14:27:59,176 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 14:27:59,177 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 14:27:59,177 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 14:27:59,177 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 14:27:59,177 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 14:27:59,193 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-04 14:27:59,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 14:27:59,199 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:59,200 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-04 14:27:59,201 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:59,208 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:59,208 INFO L82 PathProgramCache]: Analyzing trace with hash 889599113, now seen corresponding path program 1 times [2018-10-04 14:27:59,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:59,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:59,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:59,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:27:59,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:59,454 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 14:27:59,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 14:27:59,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 14:27:59,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 14:27:59,486 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:59,488 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-10-04 14:27:59,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:59,588 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2018-10-04 14:27:59,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 14:27:59,590 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 14:27:59,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:59,601 INFO L225 Difference]: With dead ends: 14 [2018-10-04 14:27:59,601 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 14:27:59,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.1s impTime 3 [2018-10-04 14:27:59,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 14:27:59,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-10-04 14:27:59,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 14:27:59,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-04 14:27:59,633 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-10-04 14:27:59,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:59,634 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-04 14:27:59,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 14:27:59,634 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-04 14:27:59,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 14:27:59,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:59,635 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-04 14:27:59,635 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:59,635 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:59,635 INFO L82 PathProgramCache]: Analyzing trace with hash 206308035, now seen corresponding path program 1 times [2018-10-04 14:27:59,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:59,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:59,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:59,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:27:59,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:59,722 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 14:27:59,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 14:27:59,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 14:27:59,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 14:27:59,724 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:27:59,724 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2018-10-04 14:27:59,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:27:59,789 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-10-04 14:27:59,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 14:27:59,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-10-04 14:27:59,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:27:59,790 INFO L225 Difference]: With dead ends: 17 [2018-10-04 14:27:59,790 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 14:27:59,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 3 [2018-10-04 14:27:59,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 14:27:59,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 14:27:59,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 14:27:59,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-04 14:27:59,801 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-04 14:27:59,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:27:59,801 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-04 14:27:59,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 14:27:59,801 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-04 14:27:59,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 14:27:59,802 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:27:59,803 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-04 14:27:59,803 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:27:59,803 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:27:59,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1531170369, now seen corresponding path program 1 times [2018-10-04 14:27:59,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:27:59,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:27:59,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:59,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:27:59,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:27:59,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:27:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:27:59,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:27:59,963 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:27:59,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:27:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:00,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:00,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:00,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:00,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-10-04 14:28:00,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 14:28:00,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 14:28:00,370 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:00,370 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 9 states. [2018-10-04 14:28:00,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:00,965 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-10-04 14:28:00,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 14:28:00,967 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2018-10-04 14:28:00,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:00,967 INFO L225 Difference]: With dead ends: 21 [2018-10-04 14:28:00,968 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 14:28:00,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 9 [2018-10-04 14:28:00,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 14:28:00,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 14:28:00,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 14:28:00,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-04 14:28:00,974 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-10-04 14:28:00,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:00,975 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-04 14:28:00,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 14:28:00,975 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-04 14:28:00,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 14:28:00,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:00,976 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-10-04 14:28:00,977 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:00,977 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:00,977 INFO L82 PathProgramCache]: Analyzing trace with hash -587211915, now seen corresponding path program 2 times [2018-10-04 14:28:00,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:00,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:00,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:00,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:00,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:01,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:01,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:01,180 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:01,190 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:28:01,220 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:28:01,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:01,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:01,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:01,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-10-04 14:28:01,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 14:28:01,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 14:28:01,407 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:01,407 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-10-04 14:28:02,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:02,167 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-10-04 14:28:02,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 14:28:02,170 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2018-10-04 14:28:02,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:02,171 INFO L225 Difference]: With dead ends: 27 [2018-10-04 14:28:02,171 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 14:28:02,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 12 [2018-10-04 14:28:02,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 14:28:02,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 14:28:02,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 14:28:02,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-04 14:28:02,177 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2018-10-04 14:28:02,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:02,177 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-04 14:28:02,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 14:28:02,177 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-04 14:28:02,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 14:28:02,178 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:02,178 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-10-04 14:28:02,179 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:02,179 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:02,179 INFO L82 PathProgramCache]: Analyzing trace with hash 70717867, now seen corresponding path program 3 times [2018-10-04 14:28:02,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:02,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:02,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:02,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:02,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:02,333 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:02,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:02,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:02,344 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:28:02,397 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 14:28:02,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:02,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:02,545 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:02,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-10-04 14:28:02,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 14:28:02,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 14:28:02,546 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:02,547 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 12 states. [2018-10-04 14:28:02,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:02,631 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-10-04 14:28:02,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 14:28:02,631 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-10-04 14:28:02,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:02,632 INFO L225 Difference]: With dead ends: 31 [2018-10-04 14:28:02,632 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 14:28:02,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 6 [2018-10-04 14:28:02,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 14:28:02,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 14:28:02,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 14:28:02,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-04 14:28:02,638 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-10-04 14:28:02,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:02,639 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-04 14:28:02,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 14:28:02,639 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-04 14:28:02,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 14:28:02,640 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:02,640 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-10-04 14:28:02,640 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:02,640 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:02,641 INFO L82 PathProgramCache]: Analyzing trace with hash 2045097383, now seen corresponding path program 4 times [2018-10-04 14:28:02,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:02,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:02,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:02,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:02,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:02,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:02,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:02,820 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:28:02,864 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:28:02,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:02,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:03,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:03,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-10-04 14:28:03,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 14:28:03,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 14:28:03,012 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:03,012 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-10-04 14:28:03,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:03,197 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2018-10-04 14:28:03,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 14:28:03,197 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-10-04 14:28:03,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:03,198 INFO L225 Difference]: With dead ends: 28 [2018-10-04 14:28:03,199 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 14:28:03,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 11 [2018-10-04 14:28:03,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 14:28:03,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-10-04 14:28:03,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 14:28:03,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-04 14:28:03,206 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2018-10-04 14:28:03,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:03,206 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-04 14:28:03,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 14:28:03,206 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-04 14:28:03,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 14:28:03,207 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:03,207 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-10-04 14:28:03,208 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:03,208 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:03,208 INFO L82 PathProgramCache]: Analyzing trace with hash 37022875, now seen corresponding path program 5 times [2018-10-04 14:28:03,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:03,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:03,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:03,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:03,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:03,530 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:03,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:03,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:03,538 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:28:03,563 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 14:28:03,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:03,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:03,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:03,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-10-04 14:28:03,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 14:28:03,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 14:28:03,704 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:03,704 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 17 states. [2018-10-04 14:28:03,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:03,797 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-10-04 14:28:03,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 14:28:03,798 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2018-10-04 14:28:03,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:03,799 INFO L225 Difference]: With dead ends: 41 [2018-10-04 14:28:03,799 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 14:28:03,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 8 [2018-10-04 14:28:03,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 14:28:03,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 14:28:03,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 14:28:03,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-04 14:28:03,806 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-10-04 14:28:03,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:03,806 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-04 14:28:03,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 14:28:03,807 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-04 14:28:03,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 14:28:03,807 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:03,808 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-10-04 14:28:03,808 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:03,808 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:03,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1480612969, now seen corresponding path program 6 times [2018-10-04 14:28:03,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:03,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:03,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:03,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:03,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:03,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:03,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:03,985 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:28:04,042 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-04 14:28:04,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:04,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:04,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:04,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2018-10-04 14:28:04,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 14:28:04,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 14:28:04,217 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:04,217 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 18 states. [2018-10-04 14:28:04,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:04,610 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2018-10-04 14:28:04,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 14:28:04,610 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2018-10-04 14:28:04,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:04,611 INFO L225 Difference]: With dead ends: 43 [2018-10-04 14:28:04,611 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 14:28:04,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 8 [2018-10-04 14:28:04,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 14:28:04,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 14:28:04,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 14:28:04,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-04 14:28:04,618 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-10-04 14:28:04,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:04,619 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-04 14:28:04,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 14:28:04,619 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-04 14:28:04,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 14:28:04,620 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:04,620 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-10-04 14:28:04,620 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:04,620 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:04,621 INFO L82 PathProgramCache]: Analyzing trace with hash 360221587, now seen corresponding path program 7 times [2018-10-04 14:28:04,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:04,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:04,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:04,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:04,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:04,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:04,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:04,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:04,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:04,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:05,100 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:05,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:05,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-10-04 14:28:05,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 14:28:05,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 14:28:05,131 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:05,131 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-10-04 14:28:05,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:05,721 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-10-04 14:28:05,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 14:28:05,724 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-10-04 14:28:05,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:05,725 INFO L225 Difference]: With dead ends: 36 [2018-10-04 14:28:05,725 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 14:28:05,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 15 [2018-10-04 14:28:05,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 14:28:05,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-10-04 14:28:05,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 14:28:05,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-04 14:28:05,733 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2018-10-04 14:28:05,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:05,733 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-04 14:28:05,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 14:28:05,734 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-04 14:28:05,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 14:28:05,734 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:05,735 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-10-04 14:28:05,735 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:05,735 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:05,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1263725703, now seen corresponding path program 8 times [2018-10-04 14:28:05,736 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:05,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:05,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:05,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:05,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:05,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:05,943 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:05,953 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:28:05,985 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:28:05,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:05,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 54 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-04 14:28:06,406 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:06,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 21 [2018-10-04 14:28:06,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 14:28:06,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 14:28:06,407 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:06,407 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 22 states. [2018-10-04 14:28:06,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:06,615 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-10-04 14:28:06,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 14:28:06,615 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2018-10-04 14:28:06,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:06,616 INFO L225 Difference]: With dead ends: 53 [2018-10-04 14:28:06,616 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 14:28:06,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 10 [2018-10-04 14:28:06,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 14:28:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 14:28:06,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 14:28:06,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-04 14:28:06,624 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-10-04 14:28:06,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:06,624 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-04 14:28:06,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 14:28:06,624 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-04 14:28:06,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 14:28:06,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:06,625 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-10-04 14:28:06,626 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:06,626 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:06,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1629808515, now seen corresponding path program 9 times [2018-10-04 14:28:06,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:06,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:06,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:06,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:06,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:06,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:06,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:06,867 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:06,893 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:28:06,978 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 14:28:06,979 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:06,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:07,143 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:07,163 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:07,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2018-10-04 14:28:07,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 14:28:07,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 14:28:07,164 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:07,164 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 24 states. [2018-10-04 14:28:07,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:07,450 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2018-10-04 14:28:07,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 14:28:07,451 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 34 [2018-10-04 14:28:07,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:07,451 INFO L225 Difference]: With dead ends: 55 [2018-10-04 14:28:07,452 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 14:28:07,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 10 [2018-10-04 14:28:07,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 14:28:07,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 14:28:07,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 14:28:07,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-04 14:28:07,459 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-10-04 14:28:07,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:07,460 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-04 14:28:07,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 14:28:07,460 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-04 14:28:07,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 14:28:07,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:07,461 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-10-04 14:28:07,461 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:07,461 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:07,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1248072575, now seen corresponding path program 10 times [2018-10-04 14:28:07,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:07,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:07,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:07,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:07,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:07,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:07,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:07,654 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:28:07,687 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:28:07,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:07,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:07,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:07,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-10-04 14:28:07,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 14:28:07,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 14:28:07,792 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:07,792 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-10-04 14:28:08,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:08,099 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-10-04 14:28:08,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 14:28:08,103 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-10-04 14:28:08,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:08,104 INFO L225 Difference]: With dead ends: 44 [2018-10-04 14:28:08,104 INFO L226 Difference]: Without dead ends: 42 [2018-10-04 14:28:08,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 19 [2018-10-04 14:28:08,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-04 14:28:08,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-10-04 14:28:08,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 14:28:08,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-10-04 14:28:08,112 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2018-10-04 14:28:08,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:08,112 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-10-04 14:28:08,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 14:28:08,113 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-10-04 14:28:08,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 14:28:08,114 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:08,114 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-10-04 14:28:08,114 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:08,114 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:08,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1910464909, now seen corresponding path program 11 times [2018-10-04 14:28:08,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:08,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:08,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:08,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:08,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:08,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:08,641 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:08,649 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:28:08,689 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 14:28:08,689 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:08,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:09,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:09,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-10-04 14:28:09,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 14:28:09,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 14:28:09,001 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:09,001 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 29 states. [2018-10-04 14:28:09,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:09,262 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-10-04 14:28:09,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 14:28:09,262 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 40 [2018-10-04 14:28:09,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:09,263 INFO L225 Difference]: With dead ends: 65 [2018-10-04 14:28:09,263 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 14:28:09,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 12 [2018-10-04 14:28:09,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 14:28:09,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 14:28:09,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 14:28:09,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-04 14:28:09,270 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-10-04 14:28:09,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:09,270 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-04 14:28:09,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 14:28:09,270 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-04 14:28:09,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 14:28:09,270 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:09,271 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-10-04 14:28:09,271 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:09,271 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:09,271 INFO L82 PathProgramCache]: Analyzing trace with hash 179690863, now seen corresponding path program 12 times [2018-10-04 14:28:09,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:09,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:09,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:09,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:09,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:09,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:09,511 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:09,519 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:28:09,557 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-04 14:28:09,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:09,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:09,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:09,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 29 [2018-10-04 14:28:09,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 14:28:09,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 14:28:09,877 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:09,877 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 30 states. [2018-10-04 14:28:10,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:10,216 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2018-10-04 14:28:10,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 14:28:10,216 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 42 [2018-10-04 14:28:10,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:10,217 INFO L225 Difference]: With dead ends: 67 [2018-10-04 14:28:10,217 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 14:28:10,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 12 [2018-10-04 14:28:10,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 14:28:10,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 14:28:10,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 14:28:10,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-04 14:28:10,224 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-10-04 14:28:10,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:10,225 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-04 14:28:10,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 14:28:10,225 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-04 14:28:10,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 14:28:10,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:10,226 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-10-04 14:28:10,226 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:10,226 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:10,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1225306773, now seen corresponding path program 13 times [2018-10-04 14:28:10,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:10,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:10,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:10,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:10,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:10,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:10,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:10,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:10,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:10,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:10,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-10-04 14:28:10,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 14:28:10,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 14:28:10,709 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:10,709 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-10-04 14:28:10,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:10,948 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2018-10-04 14:28:10,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 14:28:10,948 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-10-04 14:28:10,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:10,949 INFO L225 Difference]: With dead ends: 52 [2018-10-04 14:28:10,949 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 14:28:10,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 23 [2018-10-04 14:28:10,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 14:28:10,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-10-04 14:28:10,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 14:28:10,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-04 14:28:10,958 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2018-10-04 14:28:10,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:10,959 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-04 14:28:10,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 14:28:10,959 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-04 14:28:10,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 14:28:10,960 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:10,960 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-10-04 14:28:10,960 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:10,960 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:10,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1452473761, now seen corresponding path program 14 times [2018-10-04 14:28:10,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:10,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:10,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:10,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:10,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:12,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:12,122 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:12,129 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:28:12,165 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:28:12,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:12,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 130 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-04 14:28:12,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:12,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 33 [2018-10-04 14:28:12,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 14:28:12,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 14:28:12,394 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:12,395 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 34 states. [2018-10-04 14:28:12,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:12,574 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-10-04 14:28:12,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 14:28:12,574 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 48 [2018-10-04 14:28:12,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:12,576 INFO L225 Difference]: With dead ends: 77 [2018-10-04 14:28:12,576 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 14:28:12,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.9s impTime 14 [2018-10-04 14:28:12,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 14:28:12,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 14:28:12,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 14:28:12,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-04 14:28:12,584 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-10-04 14:28:12,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:12,584 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-04 14:28:12,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 14:28:12,585 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-04 14:28:12,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 14:28:12,586 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:12,586 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-10-04 14:28:12,586 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:12,586 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:12,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1195476315, now seen corresponding path program 15 times [2018-10-04 14:28:12,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:12,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:12,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:12,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:12,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:13,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:13,499 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:13,508 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:28:13,564 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 14:28:13,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:13,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:13,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:13,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 35 [2018-10-04 14:28:13,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 14:28:13,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 14:28:13,860 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:13,860 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 36 states. [2018-10-04 14:28:14,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:14,143 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2018-10-04 14:28:14,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 14:28:14,143 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 50 [2018-10-04 14:28:14,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:14,144 INFO L225 Difference]: With dead ends: 79 [2018-10-04 14:28:14,145 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 14:28:14,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 14 [2018-10-04 14:28:14,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 14:28:14,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 14:28:14,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 14:28:14,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-10-04 14:28:14,157 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-10-04 14:28:14,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:14,157 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-10-04 14:28:14,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 14:28:14,157 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-10-04 14:28:14,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 14:28:14,158 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:14,158 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-10-04 14:28:14,159 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:14,159 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:14,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1040107177, now seen corresponding path program 16 times [2018-10-04 14:28:14,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:14,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:14,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:14,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:14,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:14,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:14,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:14,455 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:28:14,495 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:28:14,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:14,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:14,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:14,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-10-04 14:28:14,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 14:28:14,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 14:28:14,651 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:14,651 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-10-04 14:28:14,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:14,919 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-10-04 14:28:14,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 14:28:14,919 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-10-04 14:28:14,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:14,920 INFO L225 Difference]: With dead ends: 60 [2018-10-04 14:28:14,920 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 14:28:14,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 27 [2018-10-04 14:28:14,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 14:28:14,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2018-10-04 14:28:14,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 14:28:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-04 14:28:14,928 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2018-10-04 14:28:14,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:14,929 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-04 14:28:14,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 14:28:14,929 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-04 14:28:14,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 14:28:14,930 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:14,930 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-10-04 14:28:14,930 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:14,930 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:14,930 INFO L82 PathProgramCache]: Analyzing trace with hash 75962443, now seen corresponding path program 17 times [2018-10-04 14:28:14,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:14,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:14,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:14,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:14,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:15,485 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:15,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:15,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:15,494 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:28:15,594 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-04 14:28:15,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:15,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:16,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:16,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-10-04 14:28:16,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 14:28:16,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 14:28:16,029 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:16,029 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 41 states. [2018-10-04 14:28:16,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:16,297 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-10-04 14:28:16,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 14:28:16,297 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 56 [2018-10-04 14:28:16,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:16,298 INFO L225 Difference]: With dead ends: 89 [2018-10-04 14:28:16,298 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 14:28:16,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 16 [2018-10-04 14:28:16,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 14:28:16,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 14:28:16,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 14:28:16,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-04 14:28:16,308 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-10-04 14:28:16,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:16,308 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-04 14:28:16,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 14:28:16,308 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-04 14:28:16,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 14:28:16,309 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:16,309 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-10-04 14:28:16,309 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:16,310 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:16,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1108795207, now seen corresponding path program 18 times [2018-10-04 14:28:16,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:16,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:16,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:16,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:16,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:16,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:16,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:16,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:16,718 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:28:16,777 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-04 14:28:16,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:16,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:17,154 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:17,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 41 [2018-10-04 14:28:17,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 14:28:17,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 14:28:17,155 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:17,155 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 42 states. [2018-10-04 14:28:17,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:17,464 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2018-10-04 14:28:17,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 14:28:17,464 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 58 [2018-10-04 14:28:17,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:17,465 INFO L225 Difference]: With dead ends: 91 [2018-10-04 14:28:17,465 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 14:28:17,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 22 [2018-10-04 14:28:17,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 14:28:17,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 14:28:17,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 14:28:17,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-10-04 14:28:17,472 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-10-04 14:28:17,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:17,472 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-10-04 14:28:17,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 14:28:17,472 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-10-04 14:28:17,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 14:28:17,473 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:17,473 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-10-04 14:28:17,474 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:17,474 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:17,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1523636035, now seen corresponding path program 19 times [2018-10-04 14:28:17,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:17,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:17,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:17,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:17,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:18,177 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:18,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:18,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:18,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:18,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:18,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:18,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-10-04 14:28:18,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 14:28:18,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 14:28:18,366 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:18,366 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-10-04 14:28:18,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:18,681 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-10-04 14:28:18,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 14:28:18,682 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-10-04 14:28:18,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:18,682 INFO L225 Difference]: With dead ends: 68 [2018-10-04 14:28:18,682 INFO L226 Difference]: Without dead ends: 66 [2018-10-04 14:28:18,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 31 [2018-10-04 14:28:18,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-04 14:28:18,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-10-04 14:28:18,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 14:28:18,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-04 14:28:18,693 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2018-10-04 14:28:18,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:18,693 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-04 14:28:18,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 14:28:18,694 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-04 14:28:18,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 14:28:18,694 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:18,695 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-10-04 14:28:18,695 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:18,695 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:18,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1329455159, now seen corresponding path program 20 times [2018-10-04 14:28:18,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:18,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:18,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:18,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:18,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:19,078 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:19,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:19,085 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:28:19,136 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:28:19,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:19,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:19,384 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 238 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-04 14:28:19,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:19,409 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 45 [2018-10-04 14:28:19,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 14:28:19,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 14:28:19,410 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:19,410 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 46 states. [2018-10-04 14:28:19,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:19,781 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-10-04 14:28:19,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 14:28:19,781 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 64 [2018-10-04 14:28:19,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:19,782 INFO L225 Difference]: With dead ends: 101 [2018-10-04 14:28:19,782 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 14:28:19,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 18 [2018-10-04 14:28:19,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 14:28:19,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 14:28:19,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 14:28:19,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-04 14:28:19,789 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-10-04 14:28:19,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:19,789 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-04 14:28:19,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 14:28:19,789 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-04 14:28:19,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 14:28:19,790 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:19,790 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-10-04 14:28:19,790 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:19,791 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:19,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1862593331, now seen corresponding path program 21 times [2018-10-04 14:28:19,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:19,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:19,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:19,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:19,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:20,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:20,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:20,793 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:28:20,857 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-04 14:28:20,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:20,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:21,276 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:21,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:21,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 47 [2018-10-04 14:28:21,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 14:28:21,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 14:28:21,302 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:21,303 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 48 states. [2018-10-04 14:28:22,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:22,398 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2018-10-04 14:28:22,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 14:28:22,399 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 66 [2018-10-04 14:28:22,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:22,399 INFO L225 Difference]: With dead ends: 103 [2018-10-04 14:28:22,400 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 14:28:22,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.5s impTime 18 [2018-10-04 14:28:22,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 14:28:22,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 14:28:22,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 14:28:22,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-04 14:28:22,406 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-10-04 14:28:22,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:22,406 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-04 14:28:22,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 14:28:22,406 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-04 14:28:22,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 14:28:22,413 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:22,413 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-10-04 14:28:22,414 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:22,414 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:22,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1187698897, now seen corresponding path program 22 times [2018-10-04 14:28:22,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:22,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:22,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:22,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:22,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:22,727 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:22,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:22,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:22,735 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:28:22,784 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:28:22,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:22,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:22,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:22,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-10-04 14:28:22,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 14:28:22,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 14:28:22,925 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:22,925 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-10-04 14:28:23,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:23,280 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2018-10-04 14:28:23,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 14:28:23,280 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-10-04 14:28:23,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:23,281 INFO L225 Difference]: With dead ends: 76 [2018-10-04 14:28:23,281 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 14:28:23,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 35 [2018-10-04 14:28:23,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 14:28:23,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2018-10-04 14:28:23,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 14:28:23,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-04 14:28:23,288 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2018-10-04 14:28:23,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:23,288 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-04 14:28:23,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 14:28:23,289 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-04 14:28:23,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 14:28:23,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:23,289 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-10-04 14:28:23,289 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:23,289 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:23,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1105222179, now seen corresponding path program 23 times [2018-10-04 14:28:23,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:23,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:23,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:23,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:23,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:24,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:24,315 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) [2018-10-04 14:28:24,327 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:24,396 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 14:28:24,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:24,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:24,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:24,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-10-04 14:28:24,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 14:28:24,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 14:28:24,737 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:24,737 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 53 states. [2018-10-04 14:28:25,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:25,127 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2018-10-04 14:28:25,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 14:28:25,128 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 72 [2018-10-04 14:28:25,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:25,129 INFO L225 Difference]: With dead ends: 113 [2018-10-04 14:28:25,129 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 14:28:25,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.1s impTime 20 [2018-10-04 14:28:25,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 14:28:25,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-04 14:28:25,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 14:28:25,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-04 14:28:25,137 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-10-04 14:28:25,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:25,137 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-04 14:28:25,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 14:28:25,138 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-04 14:28:25,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 14:28:25,138 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:25,138 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-10-04 14:28:25,138 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:25,139 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:25,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1247455519, now seen corresponding path program 24 times [2018-10-04 14:28:25,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:25,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:25,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:25,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:25,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:25,869 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:25,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:25,869 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:25,877 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:28:25,962 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-10-04 14:28:25,962 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:25,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:26,390 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:26,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 53 [2018-10-04 14:28:26,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 14:28:26,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 14:28:26,391 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:26,391 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 54 states. [2018-10-04 14:28:27,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:27,061 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2018-10-04 14:28:27,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 14:28:27,061 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 74 [2018-10-04 14:28:27,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:27,061 INFO L225 Difference]: With dead ends: 115 [2018-10-04 14:28:27,062 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 14:28:27,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.9s impTime 20 [2018-10-04 14:28:27,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 14:28:27,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 14:28:27,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 14:28:27,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-10-04 14:28:27,072 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-10-04 14:28:27,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:27,072 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-10-04 14:28:27,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 14:28:27,073 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-10-04 14:28:27,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 14:28:27,073 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:27,073 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-10-04 14:28:27,074 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:27,074 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:27,074 INFO L82 PathProgramCache]: Analyzing trace with hash 494741787, now seen corresponding path program 25 times [2018-10-04 14:28:27,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:27,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:27,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:27,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:27,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:27,408 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:27,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:27,408 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:27,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:27,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:28,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:28,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-10-04 14:28:28,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 14:28:28,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 14:28:28,056 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:28,056 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-10-04 14:28:28,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:28,472 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-10-04 14:28:28,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 14:28:28,473 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-10-04 14:28:28,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:28,474 INFO L225 Difference]: With dead ends: 84 [2018-10-04 14:28:28,474 INFO L226 Difference]: Without dead ends: 82 [2018-10-04 14:28:28,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.3s impTime 39 [2018-10-04 14:28:28,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-04 14:28:28,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2018-10-04 14:28:28,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 14:28:28,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-04 14:28:28,483 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2018-10-04 14:28:28,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:28,484 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-04 14:28:28,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 14:28:28,484 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-04 14:28:28,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 14:28:28,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:28,485 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-10-04 14:28:28,485 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:28,485 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:28,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1564313103, now seen corresponding path program 26 times [2018-10-04 14:28:28,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:28,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:28,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:28,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:28,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:28,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:29,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:29,304 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:29,312 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:28:29,382 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:28:29,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:29,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 378 proven. 342 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-04 14:28:29,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:29,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 57 [2018-10-04 14:28:29,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 14:28:29,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 14:28:29,910 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:29,910 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 58 states. [2018-10-04 14:28:30,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:30,489 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2018-10-04 14:28:30,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 14:28:30,490 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 80 [2018-10-04 14:28:30,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:30,490 INFO L225 Difference]: With dead ends: 125 [2018-10-04 14:28:30,491 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 14:28:30,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.1s impTime 22 [2018-10-04 14:28:30,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 14:28:30,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-04 14:28:30,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 14:28:30,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-04 14:28:30,500 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-10-04 14:28:30,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:30,500 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-04 14:28:30,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 14:28:30,500 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-04 14:28:30,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 14:28:30,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:30,501 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-10-04 14:28:30,501 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:30,501 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:30,501 INFO L82 PathProgramCache]: Analyzing trace with hash 417798411, now seen corresponding path program 27 times [2018-10-04 14:28:30,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:30,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:30,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:30,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:30,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:31,465 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:31,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:31,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:31,474 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:28:31,565 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-10-04 14:28:31,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:31,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:32,115 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:32,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:32,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 59 [2018-10-04 14:28:32,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 14:28:32,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 14:28:32,137 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:32,137 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 60 states. [2018-10-04 14:28:32,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:32,746 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2018-10-04 14:28:32,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 14:28:32,746 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 82 [2018-10-04 14:28:32,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:32,746 INFO L225 Difference]: With dead ends: 127 [2018-10-04 14:28:32,746 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 14:28:32,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.2s impTime 22 [2018-10-04 14:28:32,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 14:28:32,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 14:28:32,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 14:28:32,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-04 14:28:32,757 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-10-04 14:28:32,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:32,757 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-04 14:28:32,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 14:28:32,757 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-04 14:28:32,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 14:28:32,758 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:32,758 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-10-04 14:28:32,758 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:32,758 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:32,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1871192825, now seen corresponding path program 28 times [2018-10-04 14:28:32,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:32,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:32,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:32,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:32,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:33,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:33,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:33,607 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:28:33,670 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:28:33,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:33,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:33,811 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:33,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:33,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-10-04 14:28:33,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 14:28:33,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 14:28:33,832 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:33,832 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-10-04 14:28:34,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:34,365 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-10-04 14:28:34,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 14:28:34,366 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-10-04 14:28:34,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:34,367 INFO L225 Difference]: With dead ends: 92 [2018-10-04 14:28:34,367 INFO L226 Difference]: Without dead ends: 90 [2018-10-04 14:28:34,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.7s impTime 43 [2018-10-04 14:28:34,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-04 14:28:34,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-10-04 14:28:34,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-04 14:28:34,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-10-04 14:28:34,375 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2018-10-04 14:28:34,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:34,375 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-10-04 14:28:34,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 14:28:34,376 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-10-04 14:28:34,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 14:28:34,376 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:34,376 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-10-04 14:28:34,376 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:34,376 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:34,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1432067077, now seen corresponding path program 29 times [2018-10-04 14:28:34,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:34,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:34,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:34,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:34,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:35,174 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:35,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:35,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:35,183 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:28:35,280 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 14:28:35,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:35,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:36,030 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:36,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:36,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-10-04 14:28:36,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 14:28:36,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 14:28:36,051 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:36,051 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 65 states. [2018-10-04 14:28:36,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:36,584 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2018-10-04 14:28:36,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 14:28:36,584 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 88 [2018-10-04 14:28:36,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:36,585 INFO L225 Difference]: With dead ends: 137 [2018-10-04 14:28:36,585 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 14:28:36,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.3s impTime 24 [2018-10-04 14:28:36,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 14:28:36,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 14:28:36,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 14:28:36,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-04 14:28:36,593 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-10-04 14:28:36,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:36,594 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-04 14:28:36,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 14:28:36,594 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-04 14:28:36,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 14:28:36,594 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:36,594 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-10-04 14:28:36,595 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:36,595 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:36,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1476838665, now seen corresponding path program 30 times [2018-10-04 14:28:36,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:36,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:36,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:36,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:36,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:37,456 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:37,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:37,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:37,463 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:28:37,546 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-04 14:28:37,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:37,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:38,151 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:38,171 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:38,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 65 [2018-10-04 14:28:38,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 14:28:38,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 14:28:38,172 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:38,172 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 66 states. [2018-10-04 14:28:38,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:38,877 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2018-10-04 14:28:38,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 14:28:38,877 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 90 [2018-10-04 14:28:38,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:38,877 INFO L225 Difference]: With dead ends: 139 [2018-10-04 14:28:38,877 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 14:28:38,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.3s impTime 24 [2018-10-04 14:28:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 14:28:38,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 14:28:38,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 14:28:38,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-10-04 14:28:38,887 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-10-04 14:28:38,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:38,888 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-10-04 14:28:38,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 14:28:38,888 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-10-04 14:28:38,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 14:28:38,888 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:38,888 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-10-04 14:28:38,888 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:38,889 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:38,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1552661773, now seen corresponding path program 31 times [2018-10-04 14:28:38,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:38,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:38,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:38,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:38,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:38,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:39,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:39,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:39,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:39,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:39,520 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:39,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-10-04 14:28:39,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 14:28:39,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 14:28:39,521 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:39,521 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-10-04 14:28:40,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:40,017 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2018-10-04 14:28:40,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 14:28:40,018 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-10-04 14:28:40,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:40,019 INFO L225 Difference]: With dead ends: 100 [2018-10-04 14:28:40,019 INFO L226 Difference]: Without dead ends: 98 [2018-10-04 14:28:40,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 47 [2018-10-04 14:28:40,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-04 14:28:40,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2018-10-04 14:28:40,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 14:28:40,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-10-04 14:28:40,029 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2018-10-04 14:28:40,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:40,029 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-10-04 14:28:40,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 14:28:40,029 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-10-04 14:28:40,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 14:28:40,030 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:40,030 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-10-04 14:28:40,030 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:40,030 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:40,030 INFO L82 PathProgramCache]: Analyzing trace with hash 2078536679, now seen corresponding path program 32 times [2018-10-04 14:28:40,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:40,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:40,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:40,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:40,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:41,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:41,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:41,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:41,293 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:28:41,366 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:28:41,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:41,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 550 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-04 14:28:42,037 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:42,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 69 [2018-10-04 14:28:42,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 14:28:42,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 14:28:42,038 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:42,038 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 70 states. [2018-10-04 14:28:42,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:42,785 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2018-10-04 14:28:42,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 14:28:42,785 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 96 [2018-10-04 14:28:42,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:42,786 INFO L225 Difference]: With dead ends: 149 [2018-10-04 14:28:42,786 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 14:28:42,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.7s impTime 26 [2018-10-04 14:28:42,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 14:28:42,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-04 14:28:42,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 14:28:42,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-04 14:28:42,797 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-10-04 14:28:42,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:42,797 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-04 14:28:42,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 14:28:42,797 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-04 14:28:42,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 14:28:42,798 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:42,798 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-10-04 14:28:42,798 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:42,798 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:42,798 INFO L82 PathProgramCache]: Analyzing trace with hash 224399075, now seen corresponding path program 33 times [2018-10-04 14:28:42,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:42,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:42,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:42,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:42,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:43,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:43,748 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:43,748 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:43,756 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:28:43,850 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 14:28:43,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:43,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:44,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:44,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 71 [2018-10-04 14:28:44,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 14:28:44,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 14:28:44,564 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:44,564 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 72 states. [2018-10-04 14:28:45,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:45,882 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2018-10-04 14:28:45,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 14:28:45,882 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 98 [2018-10-04 14:28:45,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:45,883 INFO L225 Difference]: With dead ends: 151 [2018-10-04 14:28:45,883 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 14:28:45,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.8s impTime 26 [2018-10-04 14:28:45,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 14:28:45,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 14:28:45,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 14:28:45,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-10-04 14:28:45,893 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-10-04 14:28:45,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:45,893 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-10-04 14:28:45,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 14:28:45,893 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-10-04 14:28:45,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 14:28:45,893 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:45,893 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-10-04 14:28:45,894 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:45,894 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:45,894 INFO L82 PathProgramCache]: Analyzing trace with hash 809589471, now seen corresponding path program 34 times [2018-10-04 14:28:45,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:45,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:45,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:45,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:45,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:46,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:46,340 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:46,347 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:28:46,422 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:28:46,422 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:46,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:46,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:46,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-10-04 14:28:46,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 14:28:46,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 14:28:46,615 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:46,616 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-10-04 14:28:47,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:47,151 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-10-04 14:28:47,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 14:28:47,151 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-10-04 14:28:47,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:47,153 INFO L225 Difference]: With dead ends: 108 [2018-10-04 14:28:47,153 INFO L226 Difference]: Without dead ends: 106 [2018-10-04 14:28:47,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 51 [2018-10-04 14:28:47,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-04 14:28:47,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2018-10-04 14:28:47,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 14:28:47,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-04 14:28:47,164 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2018-10-04 14:28:47,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:47,164 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-04 14:28:47,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 14:28:47,164 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-04 14:28:47,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 14:28:47,165 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:47,165 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-10-04 14:28:47,165 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:47,165 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:47,165 INFO L82 PathProgramCache]: Analyzing trace with hash 726349267, now seen corresponding path program 35 times [2018-10-04 14:28:47,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:47,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:47,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:47,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:47,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:49,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:49,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:49,224 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:28:49,330 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-04 14:28:49,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:49,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:50,103 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:50,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-10-04 14:28:50,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 14:28:50,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 14:28:50,104 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:50,104 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 77 states. [2018-10-04 14:28:50,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:50,835 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-10-04 14:28:50,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 14:28:50,835 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 104 [2018-10-04 14:28:50,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:50,836 INFO L225 Difference]: With dead ends: 161 [2018-10-04 14:28:50,836 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 14:28:50,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.4s impTime 28 [2018-10-04 14:28:50,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 14:28:50,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-04 14:28:50,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-04 14:28:50,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-10-04 14:28:50,847 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-10-04 14:28:50,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:50,848 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-10-04 14:28:50,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 14:28:50,848 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-10-04 14:28:50,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 14:28:50,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:50,849 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-10-04 14:28:50,849 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:50,849 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:50,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1735038159, now seen corresponding path program 36 times [2018-10-04 14:28:50,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:50,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:50,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:50,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:50,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:51,910 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:51,910 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:51,917 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:28:52,018 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-04 14:28:52,018 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:52,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:52,755 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:52,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 77 [2018-10-04 14:28:52,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 14:28:52,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 14:28:52,756 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:52,756 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 78 states. [2018-10-04 14:28:53,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:53,938 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2018-10-04 14:28:53,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 14:28:53,938 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 106 [2018-10-04 14:28:53,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:53,939 INFO L225 Difference]: With dead ends: 163 [2018-10-04 14:28:53,939 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 14:28:53,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.6s impTime 28 [2018-10-04 14:28:53,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 14:28:53,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-04 14:28:53,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 14:28:53,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-10-04 14:28:53,953 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-10-04 14:28:53,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:53,953 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-10-04 14:28:53,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 14:28:53,953 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-10-04 14:28:53,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 14:28:53,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:53,954 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-10-04 14:28:53,954 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:53,954 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:53,955 INFO L82 PathProgramCache]: Analyzing trace with hash 422454475, now seen corresponding path program 37 times [2018-10-04 14:28:53,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:53,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:53,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:53,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:53,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:55,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:55,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:55,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:55,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:55,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:55,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-10-04 14:28:55,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 14:28:55,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 14:28:55,559 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:55,559 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-10-04 14:28:56,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:56,232 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-10-04 14:28:56,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 14:28:56,232 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-10-04 14:28:56,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:56,233 INFO L225 Difference]: With dead ends: 116 [2018-10-04 14:28:56,233 INFO L226 Difference]: Without dead ends: 114 [2018-10-04 14:28:56,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.1s impTime 55 [2018-10-04 14:28:56,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-04 14:28:56,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2018-10-04 14:28:56,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-04 14:28:56,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-10-04 14:28:56,252 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 108 [2018-10-04 14:28:56,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:56,253 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-10-04 14:28:56,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 14:28:56,253 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-10-04 14:28:56,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 14:28:56,254 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:56,254 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-10-04 14:28:56,254 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:56,254 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:56,254 INFO L82 PathProgramCache]: Analyzing trace with hash -609670721, now seen corresponding path program 38 times [2018-10-04 14:28:56,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:56,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:56,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:56,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:56,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:28:58,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:58,070 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:28:58,077 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:28:58,163 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:28:58,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:58,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 754 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-04 14:28:58,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:58,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 81 [2018-10-04 14:28:58,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 14:28:58,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 14:28:58,899 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:58,900 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 82 states. [2018-10-04 14:28:59,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:59,629 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2018-10-04 14:28:59,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 14:28:59,630 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 112 [2018-10-04 14:28:59,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:59,631 INFO L225 Difference]: With dead ends: 173 [2018-10-04 14:28:59,631 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 14:28:59,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.0s impTime 30 [2018-10-04 14:28:59,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 14:28:59,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-04 14:28:59,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 14:28:59,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-04 14:28:59,642 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-10-04 14:28:59,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:59,642 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-04 14:28:59,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 14:28:59,642 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-04 14:28:59,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 14:28:59,643 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:59,643 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-10-04 14:28:59,643 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:59,643 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:59,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1662530373, now seen corresponding path program 39 times [2018-10-04 14:28:59,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:59,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:59,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:59,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:59,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:00,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:00,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:29:00,864 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:29:00,982 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-04 14:29:00,982 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:00,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:01,801 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:01,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 83 [2018-10-04 14:29:01,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 14:29:01,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 14:29:01,802 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:01,802 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 84 states. [2018-10-04 14:29:02,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:02,582 INFO L93 Difference]: Finished difference Result 175 states and 177 transitions. [2018-10-04 14:29:02,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 14:29:02,582 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 114 [2018-10-04 14:29:02,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:02,583 INFO L225 Difference]: With dead ends: 175 [2018-10-04 14:29:02,583 INFO L226 Difference]: Without dead ends: 117 [2018-10-04 14:29:02,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.7s impTime 30 [2018-10-04 14:29:02,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-04 14:29:02,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-04 14:29:02,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-04 14:29:02,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-10-04 14:29:02,598 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-10-04 14:29:02,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:02,599 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-10-04 14:29:02,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 14:29:02,599 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-10-04 14:29:02,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 14:29:02,599 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:02,600 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-10-04 14:29:02,600 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:02,600 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:02,600 INFO L82 PathProgramCache]: Analyzing trace with hash 151625911, now seen corresponding path program 40 times [2018-10-04 14:29:02,600 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:02,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:02,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:02,601 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:02,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:03,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:03,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:29:03,163 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:29:03,258 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:29:03,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:03,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:04,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:04,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-10-04 14:29:04,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 14:29:04,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 14:29:04,460 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:04,460 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-10-04 14:29:05,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:05,026 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2018-10-04 14:29:05,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 14:29:05,027 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-10-04 14:29:05,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:05,028 INFO L225 Difference]: With dead ends: 124 [2018-10-04 14:29:05,029 INFO L226 Difference]: Without dead ends: 122 [2018-10-04 14:29:05,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 0.5s impTime 59 [2018-10-04 14:29:05,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-04 14:29:05,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2018-10-04 14:29:05,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-04 14:29:05,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-10-04 14:29:05,046 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 116 [2018-10-04 14:29:05,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:05,047 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-10-04 14:29:05,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 14:29:05,047 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-10-04 14:29:05,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-04 14:29:05,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:05,048 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-10-04 14:29:05,048 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:05,048 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:05,048 INFO L82 PathProgramCache]: Analyzing trace with hash 944557995, now seen corresponding path program 41 times [2018-10-04 14:29:05,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:05,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:05,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:05,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:05,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:06,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:06,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:06,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:29:06,712 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:29:06,852 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-04 14:29:06,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:06,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:07,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:07,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 88 [2018-10-04 14:29:07,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-04 14:29:07,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-04 14:29:07,721 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:07,721 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 89 states. [2018-10-04 14:29:08,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:08,635 INFO L93 Difference]: Finished difference Result 185 states and 187 transitions. [2018-10-04 14:29:08,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 14:29:08,636 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 120 [2018-10-04 14:29:08,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:08,637 INFO L225 Difference]: With dead ends: 185 [2018-10-04 14:29:08,637 INFO L226 Difference]: Without dead ends: 123 [2018-10-04 14:29:08,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.3s impTime 32 [2018-10-04 14:29:08,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-04 14:29:08,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-04 14:29:08,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-04 14:29:08,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-10-04 14:29:08,654 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-10-04 14:29:08,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:08,655 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-10-04 14:29:08,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-04 14:29:08,655 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-10-04 14:29:08,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-04 14:29:08,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:08,656 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-10-04 14:29:08,656 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:08,656 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:08,656 INFO L82 PathProgramCache]: Analyzing trace with hash 489076391, now seen corresponding path program 42 times [2018-10-04 14:29:08,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:08,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:08,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:08,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:08,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:10,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:10,301 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:29:10,309 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:29:10,463 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-10-04 14:29:10,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:10,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:11,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:11,794 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:11,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 89 [2018-10-04 14:29:11,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 14:29:11,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 14:29:11,795 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:11,795 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 90 states. [2018-10-04 14:29:12,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:12,826 INFO L93 Difference]: Finished difference Result 187 states and 189 transitions. [2018-10-04 14:29:12,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 14:29:12,826 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 122 [2018-10-04 14:29:12,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:12,827 INFO L225 Difference]: With dead ends: 187 [2018-10-04 14:29:12,827 INFO L226 Difference]: Without dead ends: 125 [2018-10-04 14:29:12,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.7s impTime 32 [2018-10-04 14:29:12,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-04 14:29:12,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-04 14:29:12,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-04 14:29:12,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-10-04 14:29:12,844 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-10-04 14:29:12,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:12,844 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-10-04 14:29:12,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 14:29:12,845 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-10-04 14:29:12,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-04 14:29:12,845 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:12,845 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-10-04 14:29:12,846 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:12,846 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:12,846 INFO L82 PathProgramCache]: Analyzing trace with hash 857919139, now seen corresponding path program 43 times [2018-10-04 14:29:12,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:12,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:12,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:12,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:12,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:12,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:13,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:13,387 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:29:13,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:29:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:13,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:13,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:13,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-10-04 14:29:13,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 14:29:13,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 14:29:13,752 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:13,752 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-10-04 14:29:14,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:14,356 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-10-04 14:29:14,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 14:29:14,356 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-10-04 14:29:14,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:14,357 INFO L225 Difference]: With dead ends: 132 [2018-10-04 14:29:14,357 INFO L226 Difference]: Without dead ends: 130 [2018-10-04 14:29:14,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 63 [2018-10-04 14:29:14,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-04 14:29:14,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2018-10-04 14:29:14,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-04 14:29:14,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-10-04 14:29:14,370 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2018-10-04 14:29:14,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:14,370 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-10-04 14:29:14,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 14:29:14,370 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-10-04 14:29:14,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 14:29:14,371 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:14,371 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-10-04 14:29:14,371 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:14,371 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:14,371 INFO L82 PathProgramCache]: Analyzing trace with hash 889530263, now seen corresponding path program 44 times [2018-10-04 14:29:14,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:14,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:14,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:14,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:29:14,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:15,888 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:15,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:29:15,896 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:29:15,994 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:29:15,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:15,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 990 proven. 930 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-04 14:29:17,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:17,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 93 [2018-10-04 14:29:17,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 14:29:17,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 14:29:17,282 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:17,282 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 94 states. [2018-10-04 14:29:18,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:18,484 INFO L93 Difference]: Finished difference Result 197 states and 199 transitions. [2018-10-04 14:29:18,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 14:29:18,484 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 128 [2018-10-04 14:29:18,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:18,485 INFO L225 Difference]: With dead ends: 197 [2018-10-04 14:29:18,485 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 14:29:18,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.8s impTime 34 [2018-10-04 14:29:18,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 14:29:18,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-04 14:29:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-04 14:29:18,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-10-04 14:29:18,498 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-10-04 14:29:18,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:18,498 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-10-04 14:29:18,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 14:29:18,498 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-10-04 14:29:18,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-04 14:29:18,499 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:18,499 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-10-04 14:29:18,500 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:18,500 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:18,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1611246957, now seen corresponding path program 45 times [2018-10-04 14:29:18,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:18,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:18,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:18,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:18,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:20,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:20,164 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:29:20,173 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:29:20,312 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2018-10-04 14:29:20,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:20,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:21,471 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:21,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 95 [2018-10-04 14:29:21,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 14:29:21,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 14:29:21,472 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:21,472 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 96 states. [2018-10-04 14:29:22,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:22,815 INFO L93 Difference]: Finished difference Result 199 states and 201 transitions. [2018-10-04 14:29:22,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 14:29:22,815 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 130 [2018-10-04 14:29:22,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:22,816 INFO L225 Difference]: With dead ends: 199 [2018-10-04 14:29:22,816 INFO L226 Difference]: Without dead ends: 133 [2018-10-04 14:29:22,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 2.7s impTime 34 [2018-10-04 14:29:22,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-04 14:29:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-04 14:29:22,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-04 14:29:22,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-10-04 14:29:22,834 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-10-04 14:29:22,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:22,834 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-10-04 14:29:22,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 14:29:22,834 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-10-04 14:29:22,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-04 14:29:22,835 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:22,835 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-10-04 14:29:22,835 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:22,835 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:22,835 INFO L82 PathProgramCache]: Analyzing trace with hash 323530383, now seen corresponding path program 46 times [2018-10-04 14:29:22,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:22,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:22,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:22,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:22,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:23,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:23,773 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:29:23,780 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:29:23,885 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:29:23,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:23,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:24,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:24,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-10-04 14:29:24,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 14:29:24,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 14:29:24,325 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:24,325 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-10-04 14:29:25,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:25,271 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-10-04 14:29:25,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 14:29:25,271 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-10-04 14:29:25,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:25,273 INFO L225 Difference]: With dead ends: 140 [2018-10-04 14:29:25,273 INFO L226 Difference]: Without dead ends: 138 [2018-10-04 14:29:25,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.1s impTime 67 [2018-10-04 14:29:25,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-04 14:29:25,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2018-10-04 14:29:25,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-04 14:29:25,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-10-04 14:29:25,288 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 132 [2018-10-04 14:29:25,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:25,289 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-10-04 14:29:25,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 14:29:25,289 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-10-04 14:29:25,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-04 14:29:25,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:25,289 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-10-04 14:29:25,290 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:25,290 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:25,290 INFO L82 PathProgramCache]: Analyzing trace with hash -836685437, now seen corresponding path program 47 times [2018-10-04 14:29:25,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:25,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:25,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:25,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:25,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:26,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:26,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:29:26,746 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:29:26,898 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-04 14:29:26,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:26,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:29,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:29,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 100 [2018-10-04 14:29:29,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-04 14:29:29,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-04 14:29:29,381 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:29,381 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 101 states. [2018-10-04 14:29:30,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:30,553 INFO L93 Difference]: Finished difference Result 209 states and 211 transitions. [2018-10-04 14:29:30,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 14:29:30,554 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 136 [2018-10-04 14:29:30,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:30,554 INFO L225 Difference]: With dead ends: 209 [2018-10-04 14:29:30,554 INFO L226 Difference]: Without dead ends: 139 [2018-10-04 14:29:30,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s Time 2.5s impTime 36 [2018-10-04 14:29:30,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-04 14:29:30,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-04 14:29:30,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-04 14:29:30,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-10-04 14:29:30,569 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-10-04 14:29:30,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:30,570 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-10-04 14:29:30,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-04 14:29:30,570 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-10-04 14:29:30,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-04 14:29:30,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:30,570 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-10-04 14:29:30,571 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:30,571 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:30,571 INFO L82 PathProgramCache]: Analyzing trace with hash -442130305, now seen corresponding path program 48 times [2018-10-04 14:29:30,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:30,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:30,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:30,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:30,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:32,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:32,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:29:32,018 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:29:32,174 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-04 14:29:32,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:32,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:33,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:33,390 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:33,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 101 [2018-10-04 14:29:33,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 14:29:33,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 14:29:33,391 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:33,391 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 102 states. [2018-10-04 14:29:34,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:34,675 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2018-10-04 14:29:34,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 14:29:34,675 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 138 [2018-10-04 14:29:34,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:34,676 INFO L225 Difference]: With dead ends: 211 [2018-10-04 14:29:34,676 INFO L226 Difference]: Without dead ends: 141 [2018-10-04 14:29:34,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.6s impTime 36 [2018-10-04 14:29:34,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-04 14:29:34,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-04 14:29:34,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-04 14:29:34,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-10-04 14:29:34,693 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-10-04 14:29:34,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:34,693 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-10-04 14:29:34,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 14:29:34,693 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-10-04 14:29:34,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-04 14:29:34,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:34,693 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-10-04 14:29:34,694 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:34,694 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:34,694 INFO L82 PathProgramCache]: Analyzing trace with hash 768229499, now seen corresponding path program 49 times [2018-10-04 14:29:34,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:34,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:34,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:34,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:34,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:34,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:35,412 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:35,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:29:35,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:29:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:35,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:35,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:35,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-10-04 14:29:35,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 14:29:35,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 14:29:35,788 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:35,788 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-10-04 14:29:36,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:36,678 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2018-10-04 14:29:36,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 14:29:36,678 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-10-04 14:29:36,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:36,679 INFO L225 Difference]: With dead ends: 148 [2018-10-04 14:29:36,679 INFO L226 Difference]: Without dead ends: 146 [2018-10-04 14:29:36,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.8s impTime 71 [2018-10-04 14:29:36,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-04 14:29:36,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2018-10-04 14:29:36,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-04 14:29:36,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-10-04 14:29:36,696 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 140 [2018-10-04 14:29:36,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:36,696 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-10-04 14:29:36,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 14:29:36,696 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-10-04 14:29:36,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-04 14:29:36,697 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:36,697 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-10-04 14:29:36,697 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:36,697 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:36,698 INFO L82 PathProgramCache]: Analyzing trace with hash -932188817, now seen corresponding path program 50 times [2018-10-04 14:29:36,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:36,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:36,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:36,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:29:36,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:38,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:38,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:38,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:29:38,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:29:38,678 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:29:38,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:38,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1258 proven. 1190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-04 14:29:39,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:39,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70] total 105 [2018-10-04 14:29:39,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-04 14:29:39,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-04 14:29:39,881 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:39,881 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 106 states. [2018-10-04 14:29:41,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:41,192 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2018-10-04 14:29:41,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 14:29:41,192 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 144 [2018-10-04 14:29:41,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:41,193 INFO L225 Difference]: With dead ends: 221 [2018-10-04 14:29:41,193 INFO L226 Difference]: Without dead ends: 147 [2018-10-04 14:29:41,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time 3.0s impTime 38 [2018-10-04 14:29:41,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-04 14:29:41,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-04 14:29:41,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-04 14:29:41,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-10-04 14:29:41,209 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-10-04 14:29:41,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:41,209 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-10-04 14:29:41,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-04 14:29:41,210 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-10-04 14:29:41,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-04 14:29:41,210 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:41,210 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-10-04 14:29:41,210 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:41,210 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:41,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1996726379, now seen corresponding path program 51 times [2018-10-04 14:29:41,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:41,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:41,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:41,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:41,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:43,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:43,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:43,206 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:29:43,215 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:29:43,375 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-04 14:29:43,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:43,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:44,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:44,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 107 [2018-10-04 14:29:44,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-04 14:29:44,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-04 14:29:44,637 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:44,637 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 108 states. [2018-10-04 14:29:46,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:46,131 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2018-10-04 14:29:46,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 14:29:46,131 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 146 [2018-10-04 14:29:46,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:46,131 INFO L225 Difference]: With dead ends: 223 [2018-10-04 14:29:46,132 INFO L226 Difference]: Without dead ends: 149 [2018-10-04 14:29:46,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time 3.3s impTime 38 [2018-10-04 14:29:46,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-04 14:29:46,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-04 14:29:46,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-04 14:29:46,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-10-04 14:29:46,147 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-10-04 14:29:46,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:46,148 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-10-04 14:29:46,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-04 14:29:46,148 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-10-04 14:29:46,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-04 14:29:46,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:46,149 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-10-04 14:29:46,149 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:46,149 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:46,149 INFO L82 PathProgramCache]: Analyzing trace with hash -814316441, now seen corresponding path program 52 times [2018-10-04 14:29:46,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:46,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:46,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:46,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:46,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:46,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:46,606 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:29:46,614 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:29:46,728 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:29:46,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:46,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:47,007 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:47,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-10-04 14:29:47,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 14:29:47,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 14:29:47,008 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:47,008 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-10-04 14:29:48,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:48,035 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-10-04 14:29:48,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 14:29:48,035 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-10-04 14:29:48,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:48,036 INFO L225 Difference]: With dead ends: 156 [2018-10-04 14:29:48,036 INFO L226 Difference]: Without dead ends: 154 [2018-10-04 14:29:48,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 75 [2018-10-04 14:29:48,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-04 14:29:48,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2018-10-04 14:29:48,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-04 14:29:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-10-04 14:29:48,057 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 148 [2018-10-04 14:29:48,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:48,057 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-10-04 14:29:48,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 14:29:48,057 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-10-04 14:29:48,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-04 14:29:48,058 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:48,058 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-10-04 14:29:48,058 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:48,058 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:48,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1900043099, now seen corresponding path program 53 times [2018-10-04 14:29:48,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:48,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:48,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:48,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:48,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:49,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:49,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:49,283 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:29:49,298 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:29:49,509 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2018-10-04 14:29:49,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:49,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:50,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:50,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:50,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 112 [2018-10-04 14:29:50,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-10-04 14:29:50,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-10-04 14:29:50,617 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:50,617 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 113 states. [2018-10-04 14:29:52,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:52,167 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2018-10-04 14:29:52,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 14:29:52,168 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 152 [2018-10-04 14:29:52,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:52,168 INFO L225 Difference]: With dead ends: 233 [2018-10-04 14:29:52,169 INFO L226 Difference]: Without dead ends: 155 [2018-10-04 14:29:52,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.5s impTime 40 [2018-10-04 14:29:52,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-04 14:29:52,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-04 14:29:52,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-04 14:29:52,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-10-04 14:29:52,186 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-10-04 14:29:52,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:52,187 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-10-04 14:29:52,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-10-04 14:29:52,187 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-10-04 14:29:52,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-04 14:29:52,188 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:52,188 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-10-04 14:29:52,188 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:52,188 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:52,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1700745815, now seen corresponding path program 54 times [2018-10-04 14:29:52,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:52,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:52,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:52,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:52,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:53,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:53,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:53,972 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:29:53,979 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:29:54,150 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-04 14:29:54,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:54,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:55,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:55,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 113 [2018-10-04 14:29:55,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-04 14:29:55,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-04 14:29:55,583 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:55,583 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 114 states. [2018-10-04 14:29:57,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:57,183 INFO L93 Difference]: Finished difference Result 235 states and 237 transitions. [2018-10-04 14:29:57,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 14:29:57,184 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 154 [2018-10-04 14:29:57,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:57,184 INFO L225 Difference]: With dead ends: 235 [2018-10-04 14:29:57,184 INFO L226 Difference]: Without dead ends: 157 [2018-10-04 14:29:57,185 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time 3.4s impTime 40 [2018-10-04 14:29:57,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-04 14:29:57,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-04 14:29:57,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-04 14:29:57,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-10-04 14:29:57,202 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-10-04 14:29:57,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:57,202 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-10-04 14:29:57,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-04 14:29:57,202 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-10-04 14:29:57,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-04 14:29:57,203 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:57,203 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-10-04 14:29:57,203 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:57,204 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:57,204 INFO L82 PathProgramCache]: Analyzing trace with hash -845383085, now seen corresponding path program 55 times [2018-10-04 14:29:57,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:57,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:57,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:57,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:57,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:57,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:57,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:57,901 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:29:57,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:29:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:58,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:58,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:29:58,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:58,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-10-04 14:29:58,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 14:29:58,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 14:29:58,665 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:58,665 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-10-04 14:29:59,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:59,659 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-10-04 14:29:59,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 14:29:59,660 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-10-04 14:29:59,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:59,660 INFO L225 Difference]: With dead ends: 164 [2018-10-04 14:29:59,660 INFO L226 Difference]: Without dead ends: 162 [2018-10-04 14:29:59,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.0s impTime 79 [2018-10-04 14:29:59,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-04 14:29:59,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2018-10-04 14:29:59,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-04 14:29:59,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-10-04 14:29:59,680 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 156 [2018-10-04 14:29:59,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:59,680 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-10-04 14:29:59,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 14:29:59,680 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-10-04 14:29:59,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-04 14:29:59,681 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:59,681 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-10-04 14:29:59,681 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:59,681 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:59,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1583446855, now seen corresponding path program 56 times [2018-10-04 14:29:59,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:59,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:59,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:59,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:29:59,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:00,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:00,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:00,917 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:30:01,037 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:30:01,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:01,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1558 proven. 1482 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-04 14:30:02,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:02,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78] total 117 [2018-10-04 14:30:02,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-04 14:30:02,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-04 14:30:02,276 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:02,276 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 118 states. [2018-10-04 14:30:04,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:04,147 INFO L93 Difference]: Finished difference Result 245 states and 247 transitions. [2018-10-04 14:30:04,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 14:30:04,148 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 160 [2018-10-04 14:30:04,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:04,148 INFO L225 Difference]: With dead ends: 245 [2018-10-04 14:30:04,148 INFO L226 Difference]: Without dead ends: 163 [2018-10-04 14:30:04,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.8s impTime 42 [2018-10-04 14:30:04,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-04 14:30:04,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-04 14:30:04,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-04 14:30:04,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-10-04 14:30:04,167 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-10-04 14:30:04,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:04,168 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-10-04 14:30:04,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-04 14:30:04,168 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-10-04 14:30:04,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-04 14:30:04,168 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:04,168 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-10-04 14:30:04,169 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:04,169 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:04,169 INFO L82 PathProgramCache]: Analyzing trace with hash 176666179, now seen corresponding path program 57 times [2018-10-04 14:30:04,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:04,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:04,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:04,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:04,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:06,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:06,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:06,369 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:30:06,559 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-04 14:30:06,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:06,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:08,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:08,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 119 [2018-10-04 14:30:08,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-10-04 14:30:08,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-10-04 14:30:08,269 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:08,269 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 120 states. [2018-10-04 14:30:10,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:10,079 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2018-10-04 14:30:10,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 14:30:10,079 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 162 [2018-10-04 14:30:10,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:10,080 INFO L225 Difference]: With dead ends: 247 [2018-10-04 14:30:10,080 INFO L226 Difference]: Without dead ends: 165 [2018-10-04 14:30:10,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s Time 4.1s impTime 42 [2018-10-04 14:30:10,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-04 14:30:10,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-04 14:30:10,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-04 14:30:10,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-10-04 14:30:10,098 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-10-04 14:30:10,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:10,098 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-10-04 14:30:10,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-10-04 14:30:10,099 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-10-04 14:30:10,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-04 14:30:10,099 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:10,099 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-10-04 14:30:10,099 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:10,099 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:10,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1175134783, now seen corresponding path program 58 times [2018-10-04 14:30:10,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:10,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:10,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:10,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:10,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:10,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:10,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:10,762 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:30:10,890 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:30:10,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:10,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:11,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:11,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-10-04 14:30:11,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 14:30:11,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 14:30:11,192 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:11,192 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2018-10-04 14:30:12,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:12,443 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2018-10-04 14:30:12,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-04 14:30:12,443 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2018-10-04 14:30:12,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:12,445 INFO L225 Difference]: With dead ends: 172 [2018-10-04 14:30:12,445 INFO L226 Difference]: Without dead ends: 170 [2018-10-04 14:30:12,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.2s impTime 83 [2018-10-04 14:30:12,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-04 14:30:12,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2018-10-04 14:30:12,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-04 14:30:12,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-10-04 14:30:12,466 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2018-10-04 14:30:12,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:12,466 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-10-04 14:30:12,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 14:30:12,466 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-10-04 14:30:12,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-04 14:30:12,467 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:12,467 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 1, 1, 1, 1] [2018-10-04 14:30:12,467 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:12,467 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:12,468 INFO L82 PathProgramCache]: Analyzing trace with hash 773999923, now seen corresponding path program 59 times [2018-10-04 14:30:12,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:12,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:12,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:12,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:12,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:14,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:14,826 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:14,834 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:30:15,034 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-04 14:30:15,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:15,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:16,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:16,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 124 [2018-10-04 14:30:16,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-10-04 14:30:16,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-10-04 14:30:16,686 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:16,686 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 125 states. [2018-10-04 14:30:18,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:18,745 INFO L93 Difference]: Finished difference Result 257 states and 259 transitions. [2018-10-04 14:30:18,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 14:30:18,746 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 168 [2018-10-04 14:30:18,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:18,746 INFO L225 Difference]: With dead ends: 257 [2018-10-04 14:30:18,746 INFO L226 Difference]: Without dead ends: 171 [2018-10-04 14:30:18,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s Time 4.5s impTime 44 [2018-10-04 14:30:18,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-04 14:30:18,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-04 14:30:18,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-04 14:30:18,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-10-04 14:30:18,775 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2018-10-04 14:30:18,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:18,776 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-10-04 14:30:18,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-10-04 14:30:18,776 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-10-04 14:30:18,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-04 14:30:18,777 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:18,777 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-10-04 14:30:18,777 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:18,777 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:18,777 INFO L82 PathProgramCache]: Analyzing trace with hash -926168017, now seen corresponding path program 60 times [2018-10-04 14:30:18,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:18,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:18,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:18,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:18,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:21,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:21,150 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:21,158 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:30:21,360 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2018-10-04 14:30:21,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:21,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:23,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:23,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 125 [2018-10-04 14:30:23,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-04 14:30:23,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-04 14:30:23,315 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:23,315 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 126 states. [2018-10-04 14:30:25,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:25,192 INFO L93 Difference]: Finished difference Result 259 states and 261 transitions. [2018-10-04 14:30:25,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-04 14:30:25,192 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 170 [2018-10-04 14:30:25,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:25,193 INFO L225 Difference]: With dead ends: 259 [2018-10-04 14:30:25,193 INFO L226 Difference]: Without dead ends: 173 [2018-10-04 14:30:25,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s Time 4.6s impTime 44 [2018-10-04 14:30:25,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-04 14:30:25,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-04 14:30:25,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-04 14:30:25,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-10-04 14:30:25,222 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2018-10-04 14:30:25,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:25,222 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-10-04 14:30:25,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-04 14:30:25,223 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-10-04 14:30:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-04 14:30:25,223 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:25,224 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 41, 1, 1, 1, 1] [2018-10-04 14:30:25,224 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:25,224 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:25,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1594981419, now seen corresponding path program 61 times [2018-10-04 14:30:25,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:25,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:25,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:25,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:25,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:25,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:25,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:25,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:30:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:26,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:26,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:26,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:26,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-10-04 14:30:26,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 14:30:26,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 14:30:26,415 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:26,416 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 48 states. [2018-10-04 14:30:27,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:27,746 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2018-10-04 14:30:27,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-04 14:30:27,746 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 172 [2018-10-04 14:30:27,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:27,748 INFO L225 Difference]: With dead ends: 180 [2018-10-04 14:30:27,748 INFO L226 Difference]: Without dead ends: 178 [2018-10-04 14:30:27,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.2s impTime 87 [2018-10-04 14:30:27,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-10-04 14:30:27,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2018-10-04 14:30:27,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-04 14:30:27,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-10-04 14:30:27,778 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 172 [2018-10-04 14:30:27,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:27,778 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-10-04 14:30:27,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 14:30:27,778 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-10-04 14:30:27,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-04 14:30:27,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:27,779 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 42, 1, 1, 1, 1] [2018-10-04 14:30:27,779 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:27,779 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:27,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1196544287, now seen corresponding path program 62 times [2018-10-04 14:30:27,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:27,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:27,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:27,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:30:27,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:30,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:30,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:30,180 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:30:30,309 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:30:30,310 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:30,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1890 proven. 1806 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-04 14:30:32,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:32,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86] total 129 [2018-10-04 14:30:32,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-10-04 14:30:32,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-10-04 14:30:32,190 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:32,190 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 130 states. [2018-10-04 14:30:34,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:34,348 INFO L93 Difference]: Finished difference Result 269 states and 271 transitions. [2018-10-04 14:30:34,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-04 14:30:34,349 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 176 [2018-10-04 14:30:34,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:34,349 INFO L225 Difference]: With dead ends: 269 [2018-10-04 14:30:34,349 INFO L226 Difference]: Without dead ends: 179 [2018-10-04 14:30:34,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s Time 4.6s impTime 46 [2018-10-04 14:30:34,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-04 14:30:34,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-10-04 14:30:34,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-04 14:30:34,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-10-04 14:30:34,372 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2018-10-04 14:30:34,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:34,372 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-10-04 14:30:34,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-10-04 14:30:34,373 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-10-04 14:30:34,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-04 14:30:34,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:34,374 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-10-04 14:30:34,374 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:34,374 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:34,374 INFO L82 PathProgramCache]: Analyzing trace with hash -889547749, now seen corresponding path program 63 times [2018-10-04 14:30:34,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:34,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:34,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:34,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:34,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:36,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:36,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:36,515 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:30:36,727 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2018-10-04 14:30:36,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:36,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:38,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:38,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:38,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 131 [2018-10-04 14:30:38,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-10-04 14:30:38,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-10-04 14:30:38,695 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:38,695 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 132 states. [2018-10-04 14:30:40,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:40,709 INFO L93 Difference]: Finished difference Result 271 states and 273 transitions. [2018-10-04 14:30:40,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-04 14:30:40,709 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 178 [2018-10-04 14:30:40,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:40,710 INFO L225 Difference]: With dead ends: 271 [2018-10-04 14:30:40,710 INFO L226 Difference]: Without dead ends: 181 [2018-10-04 14:30:40,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s Time 4.4s impTime 46 [2018-10-04 14:30:40,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-04 14:30:40,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-04 14:30:40,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-04 14:30:40,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2018-10-04 14:30:40,733 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2018-10-04 14:30:40,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:40,733 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2018-10-04 14:30:40,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-10-04 14:30:40,733 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2018-10-04 14:30:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-04 14:30:40,734 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:40,734 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 1, 1, 1, 1] [2018-10-04 14:30:40,734 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:40,734 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:40,735 INFO L82 PathProgramCache]: Analyzing trace with hash 125732887, now seen corresponding path program 64 times [2018-10-04 14:30:40,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:40,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:40,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:40,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:40,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:41,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:41,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:30:41,480 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:30:41,621 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:30:41,621 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:41,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:41,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:41,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2018-10-04 14:30:41,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 14:30:41,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 14:30:41,972 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:41,972 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 50 states. [2018-10-04 14:30:43,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:43,333 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-10-04 14:30:43,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-04 14:30:43,333 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 180 [2018-10-04 14:30:43,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:43,334 INFO L225 Difference]: With dead ends: 188 [2018-10-04 14:30:43,335 INFO L226 Difference]: Without dead ends: 186 [2018-10-04 14:30:43,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.3s impTime 91 [2018-10-04 14:30:43,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-04 14:30:43,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2018-10-04 14:30:43,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-04 14:30:43,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2018-10-04 14:30:43,360 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 180 [2018-10-04 14:30:43,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:43,360 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2018-10-04 14:30:43,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 14:30:43,360 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2018-10-04 14:30:43,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-04 14:30:43,361 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:43,361 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 44, 1, 1, 1, 1] [2018-10-04 14:30:43,361 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:43,361 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:43,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1723922677, now seen corresponding path program 65 times [2018-10-04 14:30:43,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:43,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:43,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:43,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:43,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:45,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:45,239 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:45,246 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:30:45,473 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-04 14:30:45,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:45,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:46,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:46,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 136 [2018-10-04 14:30:46,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-10-04 14:30:46,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-10-04 14:30:46,829 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:46,829 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand 137 states. [2018-10-04 14:30:48,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:48,472 INFO L93 Difference]: Finished difference Result 281 states and 283 transitions. [2018-10-04 14:30:48,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-04 14:30:48,472 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 184 [2018-10-04 14:30:48,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:48,473 INFO L225 Difference]: With dead ends: 281 [2018-10-04 14:30:48,473 INFO L226 Difference]: Without dead ends: 187 [2018-10-04 14:30:48,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time 3.3s impTime 48 [2018-10-04 14:30:48,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-04 14:30:48,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-04 14:30:48,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-04 14:30:48,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-10-04 14:30:48,503 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2018-10-04 14:30:48,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:48,503 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-10-04 14:30:48,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-10-04 14:30:48,503 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-10-04 14:30:48,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-04 14:30:48,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:48,504 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-10-04 14:30:48,505 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:48,505 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:48,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1000141305, now seen corresponding path program 66 times [2018-10-04 14:30:48,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:48,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:48,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:48,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:48,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:51,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:51,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:51,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:51,345 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:30:51,603 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-04 14:30:51,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:51,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:53,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:53,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 137 [2018-10-04 14:30:53,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-10-04 14:30:53,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-10-04 14:30:53,536 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:53,536 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 138 states. [2018-10-04 14:30:55,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:55,894 INFO L93 Difference]: Finished difference Result 283 states and 285 transitions. [2018-10-04 14:30:55,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-04 14:30:55,894 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 186 [2018-10-04 14:30:55,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:55,895 INFO L225 Difference]: With dead ends: 283 [2018-10-04 14:30:55,895 INFO L226 Difference]: Without dead ends: 189 [2018-10-04 14:30:55,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s Time 5.1s impTime 48 [2018-10-04 14:30:55,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-04 14:30:55,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-10-04 14:30:55,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-04 14:30:55,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2018-10-04 14:30:55,930 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2018-10-04 14:30:55,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:55,930 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2018-10-04 14:30:55,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-10-04 14:30:55,930 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2018-10-04 14:30:55,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-04 14:30:55,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:55,931 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 45, 1, 1, 1, 1] [2018-10-04 14:30:55,931 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:55,932 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:55,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1230944765, now seen corresponding path program 67 times [2018-10-04 14:30:55,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:55,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:55,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:55,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:55,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:56,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:56,645 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:30:56,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:30:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:56,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:57,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:57,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:57,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2018-10-04 14:30:57,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 14:30:57,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 14:30:57,238 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:57,238 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 52 states. [2018-10-04 14:30:58,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:58,564 INFO L93 Difference]: Finished difference Result 196 states and 198 transitions. [2018-10-04 14:30:58,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-04 14:30:58,564 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 188 [2018-10-04 14:30:58,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:58,566 INFO L225 Difference]: With dead ends: 196 [2018-10-04 14:30:58,566 INFO L226 Difference]: Without dead ends: 194 [2018-10-04 14:30:58,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.1s impTime 95 [2018-10-04 14:30:58,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-04 14:30:58,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2018-10-04 14:30:58,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-04 14:30:58,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2018-10-04 14:30:58,594 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 188 [2018-10-04 14:30:58,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:58,594 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2018-10-04 14:30:58,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 14:30:58,594 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2018-10-04 14:30:58,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-04 14:30:58,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:58,595 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 46, 1, 1, 1, 1] [2018-10-04 14:30:58,595 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:58,595 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:58,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1538846455, now seen corresponding path program 68 times [2018-10-04 14:30:58,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:58,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:58,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:58,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:30:58,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:00,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:31:00,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:31:00,525 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:31:00,668 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:31:00,668 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:31:00,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:31:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2254 proven. 2162 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-04 14:31:02,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:31:02,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94] total 141 [2018-10-04 14:31:02,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-10-04 14:31:02,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-10-04 14:31:02,026 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:31:02,026 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand 142 states. [2018-10-04 14:31:03,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:31:03,653 INFO L93 Difference]: Finished difference Result 293 states and 295 transitions. [2018-10-04 14:31:03,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-04 14:31:03,653 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 192 [2018-10-04 14:31:03,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:31:03,654 INFO L225 Difference]: With dead ends: 293 [2018-10-04 14:31:03,654 INFO L226 Difference]: Without dead ends: 195 [2018-10-04 14:31:03,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time 3.2s impTime 50 [2018-10-04 14:31:03,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-04 14:31:03,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-10-04 14:31:03,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-04 14:31:03,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-10-04 14:31:03,681 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2018-10-04 14:31:03,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:31:03,681 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-10-04 14:31:03,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-10-04 14:31:03,681 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-10-04 14:31:03,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-04 14:31:03,682 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:31:03,682 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-10-04 14:31:03,682 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:31:03,682 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:31:03,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1328268813, now seen corresponding path program 69 times [2018-10-04 14:31:03,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:31:03,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:31:03,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:03,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:31:03,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:05,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:05,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:31:05,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:31:05,564 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:31:05,814 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-04 14:31:05,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:31:05,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:31:07,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:07,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:31:07,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 143 [2018-10-04 14:31:07,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-10-04 14:31:07,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-10-04 14:31:07,352 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:31:07,352 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 144 states. [2018-10-04 14:31:09,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:31:09,064 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2018-10-04 14:31:09,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-04 14:31:09,064 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 194 [2018-10-04 14:31:09,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:31:09,065 INFO L225 Difference]: With dead ends: 295 [2018-10-04 14:31:09,065 INFO L226 Difference]: Without dead ends: 197 [2018-10-04 14:31:09,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s Time 3.3s impTime 50 [2018-10-04 14:31:09,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-04 14:31:09,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-10-04 14:31:09,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-04 14:31:09,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2018-10-04 14:31:09,092 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2018-10-04 14:31:09,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:31:09,093 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2018-10-04 14:31:09,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-10-04 14:31:09,093 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2018-10-04 14:31:09,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-04 14:31:09,094 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:31:09,094 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 47, 1, 1, 1, 1] [2018-10-04 14:31:09,094 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:31:09,094 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:31:09,094 INFO L82 PathProgramCache]: Analyzing trace with hash 742962671, now seen corresponding path program 70 times [2018-10-04 14:31:09,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:31:09,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:31:09,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:09,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:31:09,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:09,846 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:31:09,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:31:09,855 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:31:10,027 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:31:10,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:31:10,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:31:10,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:10,394 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:31:10,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2018-10-04 14:31:10,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 14:31:10,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 14:31:10,395 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:31:10,395 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 54 states. [2018-10-04 14:31:11,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:31:11,626 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2018-10-04 14:31:11,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-04 14:31:11,627 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 196 [2018-10-04 14:31:11,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:31:11,628 INFO L225 Difference]: With dead ends: 204 [2018-10-04 14:31:11,628 INFO L226 Difference]: Without dead ends: 202 [2018-10-04 14:31:11,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.1s impTime 99 [2018-10-04 14:31:11,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-10-04 14:31:11,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2018-10-04 14:31:11,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-04 14:31:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2018-10-04 14:31:11,659 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 196 [2018-10-04 14:31:11,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:31:11,660 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2018-10-04 14:31:11,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 14:31:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2018-10-04 14:31:11,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-04 14:31:11,661 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:31:11,661 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 48, 1, 1, 1, 1] [2018-10-04 14:31:11,661 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:31:11,661 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:31:11,662 INFO L82 PathProgramCache]: Analyzing trace with hash -821131037, now seen corresponding path program 71 times [2018-10-04 14:31:11,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:31:11,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:31:11,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:11,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:31:11,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:13,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:31:13,241 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:31:13,247 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:31:13,505 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2018-10-04 14:31:13,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:31:13,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:31:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:15,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:31:15,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 148 [2018-10-04 14:31:15,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-10-04 14:31:15,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-10-04 14:31:15,154 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:31:15,154 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand 149 states. [2018-10-04 14:31:16,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:31:16,888 INFO L93 Difference]: Finished difference Result 305 states and 307 transitions. [2018-10-04 14:31:16,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-04 14:31:16,888 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 200 [2018-10-04 14:31:16,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:31:16,889 INFO L225 Difference]: With dead ends: 305 [2018-10-04 14:31:16,889 INFO L226 Difference]: Without dead ends: 203 [2018-10-04 14:31:16,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time 3.2s impTime 52 [2018-10-04 14:31:16,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-04 14:31:16,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-10-04 14:31:16,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-04 14:31:16,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-10-04 14:31:16,925 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 200 [2018-10-04 14:31:16,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:31:16,925 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-10-04 14:31:16,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-10-04 14:31:16,925 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-10-04 14:31:16,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-04 14:31:16,926 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:31:16,926 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1] [2018-10-04 14:31:16,927 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:31:16,927 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:31:16,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1801644065, now seen corresponding path program 72 times [2018-10-04 14:31:16,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:31:16,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:31:16,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:16,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:31:16,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:18,593 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:31:18,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:31:18,600 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:31:18,856 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-10-04 14:31:18,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:31:18,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:31:20,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:20,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:31:20,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 149 [2018-10-04 14:31:20,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-10-04 14:31:20,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-10-04 14:31:20,603 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:31:20,603 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 150 states. [2018-10-04 14:31:22,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:31:22,365 INFO L93 Difference]: Finished difference Result 307 states and 309 transitions. [2018-10-04 14:31:22,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-04 14:31:22,365 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 202 [2018-10-04 14:31:22,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:31:22,366 INFO L225 Difference]: With dead ends: 307 [2018-10-04 14:31:22,366 INFO L226 Difference]: Without dead ends: 205 [2018-10-04 14:31:22,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s Time 3.4s impTime 52 [2018-10-04 14:31:22,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-10-04 14:31:22,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-10-04 14:31:22,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-04 14:31:22,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2018-10-04 14:31:22,394 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 202 [2018-10-04 14:31:22,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:31:22,395 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2018-10-04 14:31:22,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-10-04 14:31:22,395 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2018-10-04 14:31:22,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-10-04 14:31:22,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:31:22,396 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 50, 49, 1, 1, 1, 1] [2018-10-04 14:31:22,396 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:31:22,396 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:31:22,396 INFO L82 PathProgramCache]: Analyzing trace with hash 818141147, now seen corresponding path program 73 times [2018-10-04 14:31:22,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:31:22,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:31:22,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:22,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:31:22,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 2550 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:23,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:31:23,027 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:31:23,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:31:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:23,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:31:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 2550 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:23,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:31:23,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2018-10-04 14:31:23,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 14:31:23,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 14:31:23,563 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:31:23,563 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand 56 states. [2018-10-04 14:31:25,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:31:25,313 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-10-04 14:31:25,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-04 14:31:25,314 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 204 [2018-10-04 14:31:25,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:31:25,315 INFO L225 Difference]: With dead ends: 212 [2018-10-04 14:31:25,315 INFO L226 Difference]: Without dead ends: 210 [2018-10-04 14:31:25,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.4s impTime 103 [2018-10-04 14:31:25,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-10-04 14:31:25,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2018-10-04 14:31:25,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-04 14:31:25,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2018-10-04 14:31:25,342 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 204 [2018-10-04 14:31:25,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:31:25,342 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2018-10-04 14:31:25,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 14:31:25,343 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2018-10-04 14:31:25,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-04 14:31:25,343 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:31:25,343 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 51, 50, 1, 1, 1, 1] [2018-10-04 14:31:25,344 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:31:25,344 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:31:25,344 INFO L82 PathProgramCache]: Analyzing trace with hash -66136881, now seen corresponding path program 74 times [2018-10-04 14:31:25,344 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:31:25,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:31:25,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:25,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:31:25,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:27,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 2652 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:27,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:31:27,295 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:31:27,302 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:31:27,459 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:31:27,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:31:27,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:31:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 2650 proven. 2550 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-04 14:31:29,105 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:31:29,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102] total 153 [2018-10-04 14:31:29,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-10-04 14:31:29,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-10-04 14:31:29,107 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:31:29,107 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand 154 states. [2018-10-04 14:31:31,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:31:31,308 INFO L93 Difference]: Finished difference Result 317 states and 319 transitions. [2018-10-04 14:31:31,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-04 14:31:31,309 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 208 [2018-10-04 14:31:31,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:31:31,310 INFO L225 Difference]: With dead ends: 317 [2018-10-04 14:31:31,310 INFO L226 Difference]: Without dead ends: 211 [2018-10-04 14:31:31,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s Time 3.9s impTime 54 [2018-10-04 14:31:31,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-04 14:31:31,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-10-04 14:31:31,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-04 14:31:31,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2018-10-04 14:31:31,337 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 208 [2018-10-04 14:31:31,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:31:31,337 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2018-10-04 14:31:31,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-10-04 14:31:31,337 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2018-10-04 14:31:31,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-10-04 14:31:31,338 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:31:31,338 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 1, 1, 1, 1] [2018-10-04 14:31:31,338 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:31:31,338 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:31:31,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1015850955, now seen corresponding path program 75 times [2018-10-04 14:31:31,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:31:31,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:31:31,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:31,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:31:31,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 2652 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:33,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:31:33,298 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:31:33,305 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:31:33,591 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-04 14:31:33,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:31:33,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:31:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 2652 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:35,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:31:35,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 155 [2018-10-04 14:31:35,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-10-04 14:31:35,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-10-04 14:31:35,354 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:31:35,354 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand 156 states. [2018-10-04 14:31:37,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:31:37,256 INFO L93 Difference]: Finished difference Result 319 states and 321 transitions. [2018-10-04 14:31:37,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-04 14:31:37,256 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 210 [2018-10-04 14:31:37,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:31:37,257 INFO L225 Difference]: With dead ends: 319 [2018-10-04 14:31:37,257 INFO L226 Difference]: Without dead ends: 213 [2018-10-04 14:31:37,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s Time 3.7s impTime 54 [2018-10-04 14:31:37,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-10-04 14:31:37,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-10-04 14:31:37,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-10-04 14:31:37,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2018-10-04 14:31:37,288 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 210 [2018-10-04 14:31:37,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:31:37,288 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2018-10-04 14:31:37,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-10-04 14:31:37,288 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2018-10-04 14:31:37,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-04 14:31:37,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:31:37,289 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 52, 51, 1, 1, 1, 1] [2018-10-04 14:31:37,289 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:31:37,290 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:31:37,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1424075719, now seen corresponding path program 76 times [2018-10-04 14:31:37,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:31:37,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:31:37,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:37,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:31:37,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:37,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:38,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5408 backedges. 2756 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:38,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:31:38,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:31:38,021 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:31:38,185 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:31:38,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:31:38,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:31:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5408 backedges. 2756 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:38,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:31:38,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 57 [2018-10-04 14:31:38,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 14:31:38,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 14:31:38,575 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:31:38,575 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand 58 states. [2018-10-04 14:31:40,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:31:40,238 INFO L93 Difference]: Finished difference Result 220 states and 222 transitions. [2018-10-04 14:31:40,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-04 14:31:40,238 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 212 [2018-10-04 14:31:40,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:31:40,239 INFO L225 Difference]: With dead ends: 220 [2018-10-04 14:31:40,239 INFO L226 Difference]: Without dead ends: 218 [2018-10-04 14:31:40,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.4s impTime 107 [2018-10-04 14:31:40,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-04 14:31:40,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2018-10-04 14:31:40,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-10-04 14:31:40,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2018-10-04 14:31:40,281 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 212 [2018-10-04 14:31:40,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:31:40,281 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2018-10-04 14:31:40,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 14:31:40,281 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2018-10-04 14:31:40,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-10-04 14:31:40,282 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:31:40,282 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 53, 52, 1, 1, 1, 1] [2018-10-04 14:31:40,283 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:31:40,283 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:31:40,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1946735291, now seen corresponding path program 77 times [2018-10-04 14:31:40,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:31:40,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:31:40,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:40,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:31:40,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5618 backedges. 2862 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:42,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:31:42,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:31:42,368 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:31:42,653 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-04 14:31:42,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:31:42,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:31:44,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5618 backedges. 2862 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:44,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:31:44,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 160 [2018-10-04 14:31:44,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 161 states [2018-10-04 14:31:44,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2018-10-04 14:31:44,403 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:31:44,403 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand 161 states. [2018-10-04 14:31:46,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:31:46,658 INFO L93 Difference]: Finished difference Result 329 states and 331 transitions. [2018-10-04 14:31:46,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-04 14:31:46,658 INFO L78 Accepts]: Start accepts. Automaton has 161 states. Word has length 216 [2018-10-04 14:31:46,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:31:46,659 INFO L225 Difference]: With dead ends: 329 [2018-10-04 14:31:46,659 INFO L226 Difference]: Without dead ends: 219 [2018-10-04 14:31:46,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s Time 4.0s impTime 56 [2018-10-04 14:31:46,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-04 14:31:46,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-10-04 14:31:46,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-04 14:31:46,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2018-10-04 14:31:46,691 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 216 [2018-10-04 14:31:46,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:31:46,692 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2018-10-04 14:31:46,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 161 states. [2018-10-04 14:31:46,692 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2018-10-04 14:31:46,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-04 14:31:46,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:31:46,693 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 1, 1, 1, 1] [2018-10-04 14:31:46,693 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:31:46,693 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:31:46,693 INFO L82 PathProgramCache]: Analyzing trace with hash -34477641, now seen corresponding path program 78 times [2018-10-04 14:31:46,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:31:46,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:31:46,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:46,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:31:46,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:48,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2862 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:48,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:31:48,239 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:31:48,247 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:31:48,539 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 54 check-sat command(s) [2018-10-04 14:31:48,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:31:48,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:31:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2862 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:50,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:31:50,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 161 [2018-10-04 14:31:50,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-10-04 14:31:50,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-10-04 14:31:50,078 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:31:50,078 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand 162 states. [2018-10-04 14:31:52,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:31:52,165 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2018-10-04 14:31:52,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-04 14:31:52,165 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 218 [2018-10-04 14:31:52,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:31:52,166 INFO L225 Difference]: With dead ends: 331 [2018-10-04 14:31:52,166 INFO L226 Difference]: Without dead ends: 221 [2018-10-04 14:31:52,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s Time 3.3s impTime 56 [2018-10-04 14:31:52,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-04 14:31:52,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-10-04 14:31:52,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-10-04 14:31:52,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 222 transitions. [2018-10-04 14:31:52,199 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 222 transitions. Word has length 218 [2018-10-04 14:31:52,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:31:52,199 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 222 transitions. [2018-10-04 14:31:52,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-10-04 14:31:52,199 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 222 transitions. [2018-10-04 14:31:52,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-10-04 14:31:52,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:31:52,200 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 54, 53, 1, 1, 1, 1] [2018-10-04 14:31:52,201 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:31:52,201 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:31:52,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1309593165, now seen corresponding path program 79 times [2018-10-04 14:31:52,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:31:52,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:31:52,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:52,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:31:52,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:31:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5832 backedges. 2970 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:52,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:31:52,864 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:31:52,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:31:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:31:53,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:31:53,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5832 backedges. 2970 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:31:53,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:31:53,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57] total 59 [2018-10-04 14:31:53,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 14:31:53,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 14:31:53,442 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:31:53,442 INFO L87 Difference]: Start difference. First operand 221 states and 222 transitions. Second operand 60 states. Received shutdown request... [2018-10-04 14:31:54,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-04 14:31:54,467 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 14:31:54,472 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 14:31:54,473 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 02:31:54 BoogieIcfgContainer [2018-10-04 14:31:54,473 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 14:31:54,473 INFO L168 Benchmark]: Toolchain (without parser) took 235833.48 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 156.8 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 314.4 MB). Peak memory consumption was 471.2 MB. Max. memory is 7.1 GB. [2018-10-04 14:31:54,475 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 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. [2018-10-04 14:31:54,476 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.64 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. [2018-10-04 14:31:54,476 INFO L168 Benchmark]: Boogie Preprocessor took 21.29 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. [2018-10-04 14:31:54,477 INFO L168 Benchmark]: RCFGBuilder took 395.07 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. [2018-10-04 14:31:54,477 INFO L168 Benchmark]: TraceAbstraction took 235374.56 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 156.8 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 293.3 MB). Peak memory consumption was 450.1 MB. Max. memory is 7.1 GB. [2018-10-04 14:31:54,480 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 0.20 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 38.64 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 21.29 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 395.07 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 235374.56 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 156.8 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 293.3 MB). Peak memory consumption was 450.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 75). Cancelled while BasicCegarLoop was constructing difference of abstraction (221states) and FLOYD_HOARE automaton (currently 92 states, 60 states before enhancement), while ReachableStatesComputation was computing reachable states (179 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 235.3s OverallTime, 81 OverallIterations, 55 TraceHistogramMax, 79.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2537 SDtfs, 2048 SDslu, 30173 SDs, 0 SdLazy, 31697 SolverSat, 4982 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 21.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15927 GetRequests, 8470 SyntacticMatches, 0 SemanticMatches, 7457 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 177.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=221occurred in iteration=80, 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: 1.2s AutomataMinimizationTime, 80 MinimizatonAttempts, 26 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.3s SsaConstructionTime, 10.2s SatisfiabilityAnalysisTime, 138.4s InterpolantComputationTime, 18438 NumberOfCodeBlocks, 18438 NumberOfCodeBlocksAsserted, 1291 NumberOfCheckSat, 18278 ConstructedInterpolants, 0 QuantifiedInterpolants, 10595164 SizeOfPredicates, 237 NumberOfNonLiveVariables, 50033 ConjunctsInSsa, 4751 ConjunctsInUnsatCore, 160 InterpolantComputations, 2 PerfectInterpolantSequences, 164782/323646 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/fragtest_simple.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_14-31-54-491.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/fragtest_simple.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_14-31-54-491.csv Completed graceful shutdown