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.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/seq.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 11:49:19,684 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 11:49:19,686 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 11:49:19,699 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 11:49:19,700 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 11:49:19,701 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 11:49:19,702 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 11:49:19,704 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 11:49:19,706 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 11:49:19,706 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 11:49:19,707 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-02 11:49:19,731 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-02 11:49:19,746 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 11:49:19,746 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 11:49:19,747 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 11:49:19,747 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 11:49:19,748 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 11:49:19,748 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 11:49:19,748 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 11:49:19,748 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 11:49:19,749 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 11:49:19,749 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 11:49:19,749 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 11:49:19,749 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 11:49:19,749 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 11:49:19,749 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 11:49:19,750 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 11:49:19,750 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 11:49:19,750 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 11:49:19,750 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 11:49:19,751 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 11:49:19,751 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 11:49:19,751 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 11:49:19,751 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 11:49:19,751 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:49:19,752 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 11:49:19,752 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 11:49:19,752 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 11:49:19,752 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 11:49:19,752 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 11:49:19,753 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 11:49:19,753 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 11:49:19,815 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 11:49:19,830 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 11:49:19,836 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 11:49:19,837 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 11:49:19,838 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 11:49:19,839 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/seq.i_4.bpl [2018-10-02 11:49:19,839 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/seq.i_4.bpl' [2018-10-02 11:49:19,915 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 11:49:19,918 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 11:49:19,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 11:49:19,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 11:49:19,919 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 11:49:19,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:49:19" (1/1) ... [2018-10-02 11:49:19,953 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:49:19" (1/1) ... [2018-10-02 11:49:19,960 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 11:49:19,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 11:49:19,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 11:49:19,961 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 11:49:19,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:49:19" (1/1) ... [2018-10-02 11:49:19,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:49:19" (1/1) ... [2018-10-02 11:49:19,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:49:19" (1/1) ... [2018-10-02 11:49:19,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:49:19" (1/1) ... [2018-10-02 11:49:19,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:49:19" (1/1) ... [2018-10-02 11:49:19,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:49:19" (1/1) ... [2018-10-02 11:49:19,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:49:19" (1/1) ... [2018-10-02 11:49:19,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 11:49:19,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 11:49:19,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 11:49:19,983 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 11:49:19,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:49:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:49:20,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-02 11:49:20,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-02 11:49:20,358 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-02 11:49:20,359 INFO L202 PluginConnector]: Adding new model seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:49:20 BoogieIcfgContainer [2018-10-02 11:49:20,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 11:49:20,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 11:49:20,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 11:49:20,364 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 11:49:20,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:49:19" (1/2) ... [2018-10-02 11:49:20,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d1e96e and model type seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:49:20, skipping insertion in model container [2018-10-02 11:49:20,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:49:20" (2/2) ... [2018-10-02 11:49:20,370 INFO L112 eAbstractionObserver]: Analyzing ICFG seq.i_4.bpl [2018-10-02 11:49:20,381 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 11:49:20,393 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 11:49:20,448 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 11:49:20,449 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 11:49:20,449 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 11:49:20,449 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 11:49:20,450 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 11:49:20,450 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 11:49:20,450 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 11:49:20,450 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 11:49:20,450 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 11:49:20,471 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-02 11:49:20,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 11:49:20,485 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:20,490 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-02 11:49:20,492 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:20,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:20,501 INFO L82 PathProgramCache]: Analyzing trace with hash 889539531, now seen corresponding path program 1 times [2018-10-02 11:49:20,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:20,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:20,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:20,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:49:20,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:20,787 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:49:20,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-02 11:49:20,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 11:49:20,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 11:49:20,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:49:20,816 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-10-02 11:49:20,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:20,987 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2018-10-02 11:49:20,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 11:49:20,989 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-02 11:49:20,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:20,999 INFO L225 Difference]: With dead ends: 16 [2018-10-02 11:49:20,999 INFO L226 Difference]: Without dead ends: 9 [2018-10-02 11:49:21,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:49:21,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-02 11:49:21,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-02 11:49:21,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-02 11:49:21,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-02 11:49:21,041 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-10-02 11:49:21,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:21,042 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-02 11:49:21,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 11:49:21,042 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-02 11:49:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-02 11:49:21,043 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:21,043 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-02 11:49:21,043 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:21,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:21,044 INFO L82 PathProgramCache]: Analyzing trace with hash 198621957, now seen corresponding path program 1 times [2018-10-02 11:49:21,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:21,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:21,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:21,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:49:21,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:21,338 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:49:21,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-02 11:49:21,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 11:49:21,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 11:49:21,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:49:21,341 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-10-02 11:49:21,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:21,457 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-10-02 11:49:21,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:49:21,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-02 11:49:21,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:21,460 INFO L225 Difference]: With dead ends: 17 [2018-10-02 11:49:21,460 INFO L226 Difference]: Without dead ends: 15 [2018-10-02 11:49:21,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:49:21,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-02 11:49:21,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2018-10-02 11:49:21,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 11:49:21,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-02 11:49:21,466 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-02 11:49:21,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:21,466 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-02 11:49:21,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 11:49:21,467 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-02 11:49:21,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-02 11:49:21,467 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:21,468 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-02 11:49:21,468 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:21,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:21,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1897191999, now seen corresponding path program 1 times [2018-10-02 11:49:21,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:21,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:21,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:21,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:49:21,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:21,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:21,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:21,621 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-02 11:49:21,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:21,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:22,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:22,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-10-02 11:49:22,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:49:22,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:49:22,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:49:22,102 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 10 states. [2018-10-02 11:49:22,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:22,328 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-02 11:49:22,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:49:22,332 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-02 11:49:22,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:22,332 INFO L225 Difference]: With dead ends: 20 [2018-10-02 11:49:22,333 INFO L226 Difference]: Without dead ends: 13 [2018-10-02 11:49:22,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:49:22,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-02 11:49:22,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-02 11:49:22,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-02 11:49:22,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-02 11:49:22,340 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-10-02 11:49:22,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:22,340 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-02 11:49:22,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:49:22,340 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-02 11:49:22,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-02 11:49:22,341 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:22,341 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-10-02 11:49:22,342 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:22,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:22,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1765270407, now seen corresponding path program 2 times [2018-10-02 11:49:22,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:22,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:22,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:22,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:49:22,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:22,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:22,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:22,472 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:22,482 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:49:22,512 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:49:22,513 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:22,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:22,618 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:22,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-10-02 11:49:22,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:49:22,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:49:22,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:49:22,622 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-10-02 11:49:22,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:22,725 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-02 11:49:22,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:49:22,726 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-10-02 11:49:22,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:22,728 INFO L225 Difference]: With dead ends: 21 [2018-10-02 11:49:22,728 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 11:49:22,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:49:22,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 11:49:22,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-10-02 11:49:22,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-02 11:49:22,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-02 11:49:22,735 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-10-02 11:49:22,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:22,736 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-02 11:49:22,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:49:22,736 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-02 11:49:22,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-02 11:49:22,737 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:22,737 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-10-02 11:49:22,737 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:22,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:22,738 INFO L82 PathProgramCache]: Analyzing trace with hash 87273139, now seen corresponding path program 3 times [2018-10-02 11:49:22,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:22,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:22,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:22,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:22,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:23,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:23,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:23,181 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:49:23,199 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-02 11:49:23,200 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:23,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:23,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:23,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-10-02 11:49:23,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:49:23,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:49:23,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:49:23,471 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 14 states. [2018-10-02 11:49:23,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:23,649 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-10-02 11:49:23,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:49:23,650 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-02 11:49:23,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:23,650 INFO L225 Difference]: With dead ends: 26 [2018-10-02 11:49:23,651 INFO L226 Difference]: Without dead ends: 17 [2018-10-02 11:49:23,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:49:23,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-02 11:49:23,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-02 11:49:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-02 11:49:23,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-02 11:49:23,656 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2018-10-02 11:49:23,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:23,656 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-02 11:49:23,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:49:23,657 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-02 11:49:23,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-02 11:49:23,657 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:23,658 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2018-10-02 11:49:23,658 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:23,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:23,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1096334355, now seen corresponding path program 4 times [2018-10-02 11:49:23,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:23,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:23,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:23,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:23,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:23,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:23,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:23,797 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:49:23,813 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:49:23,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:23,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:23,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:23,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-10-02 11:49:23,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:49:23,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:49:23,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:49:23,862 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-10-02 11:49:24,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:24,004 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-02 11:49:24,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:49:24,005 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-02 11:49:24,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:24,005 INFO L225 Difference]: With dead ends: 25 [2018-10-02 11:49:24,006 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 11:49:24,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:49:24,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 11:49:24,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-10-02 11:49:24,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 11:49:24,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-02 11:49:24,011 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-10-02 11:49:24,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:24,011 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-02 11:49:24,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:49:24,012 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-02 11:49:24,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-02 11:49:24,013 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:24,013 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-10-02 11:49:24,013 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:24,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:24,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1310275289, now seen corresponding path program 5 times [2018-10-02 11:49:24,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:24,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:24,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:24,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:24,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:24,196 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:24,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:24,196 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:24,216 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:49:24,257 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-02 11:49:24,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:24,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:24,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:24,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-10-02 11:49:24,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 11:49:24,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 11:49:24,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:49:24,475 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 18 states. [2018-10-02 11:49:24,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:24,635 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-10-02 11:49:24,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:49:24,635 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-02 11:49:24,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:24,636 INFO L225 Difference]: With dead ends: 32 [2018-10-02 11:49:24,636 INFO L226 Difference]: Without dead ends: 21 [2018-10-02 11:49:24,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:49:24,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-02 11:49:24,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-02 11:49:24,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-02 11:49:24,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-02 11:49:24,642 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-10-02 11:49:24,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:24,642 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-02 11:49:24,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 11:49:24,643 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-02 11:49:24,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-02 11:49:24,643 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:24,643 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-10-02 11:49:24,644 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:24,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:24,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1330040479, now seen corresponding path program 6 times [2018-10-02 11:49:24,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:24,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:24,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:24,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:24,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:24,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:24,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:24,957 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:49:24,987 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-02 11:49:24,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:24,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:25,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:25,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-10-02 11:49:25,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:49:25,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:49:25,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:49:25,089 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-10-02 11:49:25,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:25,203 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-02 11:49:25,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 11:49:25,205 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-10-02 11:49:25,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:25,206 INFO L225 Difference]: With dead ends: 29 [2018-10-02 11:49:25,206 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 11:49:25,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:49:25,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 11:49:25,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2018-10-02 11:49:25,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-02 11:49:25,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-02 11:49:25,212 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-10-02 11:49:25,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:25,213 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-02 11:49:25,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:49:25,213 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-02 11:49:25,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-02 11:49:25,214 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:25,214 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-10-02 11:49:25,214 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:25,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:25,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1731406235, now seen corresponding path program 7 times [2018-10-02 11:49:25,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:25,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:25,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:25,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:25,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:25,390 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:25,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:25,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:25,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:49:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:25,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:25,738 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:25,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-10-02 11:49:25,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 11:49:25,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 11:49:25,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:49:25,739 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 22 states. [2018-10-02 11:49:26,117 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-02 11:49:26,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:26,120 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-02 11:49:26,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 11:49:26,122 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-02 11:49:26,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:26,123 INFO L225 Difference]: With dead ends: 38 [2018-10-02 11:49:26,123 INFO L226 Difference]: Without dead ends: 25 [2018-10-02 11:49:26,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:49:26,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-02 11:49:26,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-02 11:49:26,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-02 11:49:26,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-02 11:49:26,134 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-10-02 11:49:26,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:26,135 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-02 11:49:26,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 11:49:26,135 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-02 11:49:26,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-02 11:49:26,139 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:26,139 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-10-02 11:49:26,140 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:26,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:26,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1774380245, now seen corresponding path program 8 times [2018-10-02 11:49:26,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:26,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:26,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:26,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:49:26,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:26,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:26,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:26,295 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:49:26,323 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:49:26,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:26,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:26,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:26,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-10-02 11:49:26,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:49:26,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:49:26,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:49:26,397 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2018-10-02 11:49:26,744 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-10-02 11:49:27,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:27,141 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-10-02 11:49:27,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 11:49:27,142 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2018-10-02 11:49:27,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:27,142 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:49:27,143 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:49:27,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:49:27,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:49:27,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-10-02 11:49:27,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-02 11:49:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-02 11:49:27,149 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-10-02 11:49:27,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:27,149 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-02 11:49:27,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:49:27,149 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-02 11:49:27,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-02 11:49:27,150 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:27,150 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-10-02 11:49:27,150 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:27,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:27,151 INFO L82 PathProgramCache]: Analyzing trace with hash 77451279, now seen corresponding path program 9 times [2018-10-02 11:49:27,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:27,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:27,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:27,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:27,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:27,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:27,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:27,625 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:49:27,649 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-02 11:49:27,649 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:27,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:28,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:28,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2018-10-02 11:49:28,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 11:49:28,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 11:49:28,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:49:28,025 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 26 states. [2018-10-02 11:49:28,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:28,526 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-10-02 11:49:28,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 11:49:28,526 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-02 11:49:28,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:28,527 INFO L225 Difference]: With dead ends: 44 [2018-10-02 11:49:28,527 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 11:49:28,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:49:28,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 11:49:28,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-02 11:49:28,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-02 11:49:28,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-02 11:49:28,533 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-10-02 11:49:28,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:28,534 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-02 11:49:28,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 11:49:28,534 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-02 11:49:28,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-02 11:49:28,535 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:28,535 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-10-02 11:49:28,535 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:28,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:28,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1980325449, now seen corresponding path program 10 times [2018-10-02 11:49:28,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:28,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:28,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:28,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:28,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:28,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:28,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:28,724 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:49:28,744 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:49:28,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:28,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:28,783 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:28,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:28,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-10-02 11:49:28,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 11:49:28,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 11:49:28,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:49:28,805 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-10-02 11:49:29,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:29,052 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-02 11:49:29,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 11:49:29,053 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-10-02 11:49:29,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:29,054 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:49:29,054 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:49:29,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:49:29,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:49:29,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-10-02 11:49:29,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-02 11:49:29,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-02 11:49:29,062 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-10-02 11:49:29,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:29,062 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-02 11:49:29,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 11:49:29,063 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-02 11:49:29,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-02 11:49:29,063 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:29,063 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-10-02 11:49:29,064 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:29,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:29,064 INFO L82 PathProgramCache]: Analyzing trace with hash 422296707, now seen corresponding path program 11 times [2018-10-02 11:49:29,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:29,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:29,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:29,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:29,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:29,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:29,253 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:29,262 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:49:29,290 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-02 11:49:29,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:29,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:29,545 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:29,567 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:29,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2018-10-02 11:49:29,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 11:49:29,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 11:49:29,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=673, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:49:29,569 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 30 states. [2018-10-02 11:49:29,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:29,849 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-10-02 11:49:29,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 11:49:29,849 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-02 11:49:29,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:29,850 INFO L225 Difference]: With dead ends: 50 [2018-10-02 11:49:29,850 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:49:29,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:49:29,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:49:29,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-02 11:49:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-02 11:49:29,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-02 11:49:29,857 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-10-02 11:49:29,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:29,857 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-02 11:49:29,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 11:49:29,858 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-02 11:49:29,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-02 11:49:29,858 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:29,859 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-10-02 11:49:29,859 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:29,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:29,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1320051267, now seen corresponding path program 12 times [2018-10-02 11:49:29,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:29,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:29,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:29,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:29,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:30,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:30,297 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:30,306 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:49:30,334 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:49:30,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:30,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:30,356 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:30,377 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:30,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-10-02 11:49:30,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-02 11:49:30,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-02 11:49:30,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:49:30,378 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2018-10-02 11:49:30,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:30,701 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-10-02 11:49:30,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 11:49:30,701 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2018-10-02 11:49:30,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:30,703 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:49:30,703 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:49:30,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:49:30,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:49:30,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-10-02 11:49:30,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-02 11:49:30,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-02 11:49:30,711 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-10-02 11:49:30,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:30,711 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-02 11:49:30,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-02 11:49:30,711 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-02 11:49:30,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 11:49:30,712 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:30,712 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-10-02 11:49:30,712 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:30,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:30,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1553862921, now seen corresponding path program 13 times [2018-10-02 11:49:30,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:30,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:30,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:30,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:30,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:30,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:30,965 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:30,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:49:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:31,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:31,339 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:31,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2018-10-02 11:49:31,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 11:49:31,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 11:49:31,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:49:31,341 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 34 states. [2018-10-02 11:49:31,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:31,650 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-10-02 11:49:31,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 11:49:31,650 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-02 11:49:31,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:31,651 INFO L225 Difference]: With dead ends: 56 [2018-10-02 11:49:31,651 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:49:31,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=381, Invalid=1341, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:49:31,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:49:31,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-02 11:49:31,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-02 11:49:31,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-02 11:49:31,659 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-10-02 11:49:31,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:31,659 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-02 11:49:31,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 11:49:31,660 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-02 11:49:31,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-02 11:49:31,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:31,661 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-10-02 11:49:31,661 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:31,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:31,661 INFO L82 PathProgramCache]: Analyzing trace with hash 115385137, now seen corresponding path program 14 times [2018-10-02 11:49:31,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:31,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:31,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:31,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:49:31,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:31,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:31,793 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:31,801 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:49:31,826 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:49:31,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:31,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:31,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:31,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-10-02 11:49:31,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:49:31,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:49:31,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:49:31,899 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-10-02 11:49:32,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:32,490 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-10-02 11:49:32,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 11:49:32,492 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-10-02 11:49:32,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:32,493 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:49:32,493 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:49:32,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=317, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:49:32,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:49:32,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-10-02 11:49:32,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-02 11:49:32,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-02 11:49:32,501 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-10-02 11:49:32,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:32,501 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-02 11:49:32,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:49:32,502 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-02 11:49:32,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-02 11:49:32,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:32,502 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-10-02 11:49:32,503 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:32,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:32,503 INFO L82 PathProgramCache]: Analyzing trace with hash -783980693, now seen corresponding path program 15 times [2018-10-02 11:49:32,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:32,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:32,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:32,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:32,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:32,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:32,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:32,789 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:32,805 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:49:32,868 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:49:32,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:32,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:33,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:33,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2018-10-02 11:49:33,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 11:49:33,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 11:49:33,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1099, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:49:33,309 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 38 states. [2018-10-02 11:49:34,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:34,018 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-10-02 11:49:34,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 11:49:34,019 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-02 11:49:34,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:34,019 INFO L225 Difference]: With dead ends: 62 [2018-10-02 11:49:34,019 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:49:34,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=469, Invalid=1693, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:49:34,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:49:34,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-02 11:49:34,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-02 11:49:34,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-10-02 11:49:34,026 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2018-10-02 11:49:34,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:34,026 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-10-02 11:49:34,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 11:49:34,026 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-10-02 11:49:34,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-02 11:49:34,027 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:34,027 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-10-02 11:49:34,027 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:34,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:34,028 INFO L82 PathProgramCache]: Analyzing trace with hash 830172837, now seen corresponding path program 16 times [2018-10-02 11:49:34,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:34,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:34,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:34,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:34,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:34,204 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:34,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:34,204 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:34,219 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:49:34,243 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:49:34,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:34,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:34,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:34,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-10-02 11:49:34,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 11:49:34,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 11:49:34,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:49:34,299 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-10-02 11:49:34,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:34,509 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-02 11:49:34,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 11:49:34,509 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-10-02 11:49:34,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:34,510 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:49:34,511 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:49:34,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:49:34,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:49:34,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-10-02 11:49:34,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-02 11:49:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-02 11:49:34,518 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-10-02 11:49:34,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:34,518 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-02 11:49:34,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 11:49:34,519 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-02 11:49:34,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-02 11:49:34,519 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:34,519 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-10-02 11:49:34,519 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:34,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:34,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1067768353, now seen corresponding path program 17 times [2018-10-02 11:49:34,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:34,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:34,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:34,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:34,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:34,968 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:34,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:34,969 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:34,976 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:49:35,009 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-02 11:49:35,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:35,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:35,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:35,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2018-10-02 11:49:35,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 11:49:35,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 11:49:35,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1351, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:49:35,588 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 42 states. [2018-10-02 11:49:35,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:35,911 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-10-02 11:49:35,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 11:49:35,912 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-10-02 11:49:35,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:35,912 INFO L225 Difference]: With dead ends: 68 [2018-10-02 11:49:35,913 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:49:35,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:49:35,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:49:35,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-02 11:49:35,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-02 11:49:35,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-02 11:49:35,923 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-10-02 11:49:35,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:35,923 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-02 11:49:35,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 11:49:35,923 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-02 11:49:35,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-02 11:49:35,924 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:35,924 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-10-02 11:49:35,924 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:35,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:35,925 INFO L82 PathProgramCache]: Analyzing trace with hash 2070347801, now seen corresponding path program 18 times [2018-10-02 11:49:35,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:35,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:35,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:35,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:35,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:36,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:36,180 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:36,193 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:49:36,227 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-02 11:49:36,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:36,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:36,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:36,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-10-02 11:49:36,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 11:49:36,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 11:49:36,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:49:36,291 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-10-02 11:49:36,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:36,489 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-10-02 11:49:36,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 11:49:36,489 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-10-02 11:49:36,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:36,490 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:49:36,490 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:49:36,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:49:36,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:49:36,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2018-10-02 11:49:36,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-02 11:49:36,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-02 11:49:36,499 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2018-10-02 11:49:36,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:36,499 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-02 11:49:36,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 11:49:36,500 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-02 11:49:36,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-02 11:49:36,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:36,500 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-10-02 11:49:36,500 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:36,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:36,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1034431059, now seen corresponding path program 19 times [2018-10-02 11:49:36,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:36,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:36,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:36,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:36,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:36,928 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:36,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:36,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:36,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:49:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:36,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:37,858 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:37,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2018-10-02 11:49:37,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 11:49:37,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 11:49:37,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=1629, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:49:37,859 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 46 states. [2018-10-02 11:49:38,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:38,332 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-10-02 11:49:38,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 11:49:38,333 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-10-02 11:49:38,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:38,333 INFO L225 Difference]: With dead ends: 74 [2018-10-02 11:49:38,333 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:49:38,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=672, Invalid=2520, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 11:49:38,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:49:38,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-02 11:49:38,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-02 11:49:38,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-02 11:49:38,344 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2018-10-02 11:49:38,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:38,344 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-02 11:49:38,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 11:49:38,344 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-02 11:49:38,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-02 11:49:38,345 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:38,345 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-10-02 11:49:38,345 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:38,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:38,346 INFO L82 PathProgramCache]: Analyzing trace with hash 2120767373, now seen corresponding path program 20 times [2018-10-02 11:49:38,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:38,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:38,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:38,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:49:38,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:39,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:39,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:39,364 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:49:39,406 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:49:39,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:39,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:39,475 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:39,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:39,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-10-02 11:49:39,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 11:49:39,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 11:49:39,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:49:39,496 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 17 states. [2018-10-02 11:49:39,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:39,744 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-10-02 11:49:39,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 11:49:39,747 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2018-10-02 11:49:39,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:39,748 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:49:39,748 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:49:39,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=303, Invalid=509, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:49:39,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:49:39,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2018-10-02 11:49:39,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-02 11:49:39,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-02 11:49:39,759 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-10-02 11:49:39,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:39,759 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-02 11:49:39,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 11:49:39,759 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-02 11:49:39,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-02 11:49:39,760 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:39,760 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-10-02 11:49:39,760 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:39,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:39,761 INFO L82 PathProgramCache]: Analyzing trace with hash -2051967801, now seen corresponding path program 21 times [2018-10-02 11:49:39,761 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:39,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:39,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:39,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:39,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:40,272 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:40,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:40,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:40,283 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:49:40,318 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-02 11:49:40,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:40,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:41,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:41,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2018-10-02 11:49:41,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 11:49:41,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 11:49:41,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=1933, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:49:41,030 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 50 states. [2018-10-02 11:49:41,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:41,506 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-10-02 11:49:41,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 11:49:41,506 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-10-02 11:49:41,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:41,507 INFO L225 Difference]: With dead ends: 80 [2018-10-02 11:49:41,507 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:49:41,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=787, Invalid=2995, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:49:41,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:49:41,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-02 11:49:41,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-02 11:49:41,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-10-02 11:49:41,517 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-10-02 11:49:41,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:41,517 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-10-02 11:49:41,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 11:49:41,517 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-10-02 11:49:41,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-02 11:49:41,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:41,518 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-10-02 11:49:41,518 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:41,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:41,518 INFO L82 PathProgramCache]: Analyzing trace with hash -473664255, now seen corresponding path program 22 times [2018-10-02 11:49:41,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:41,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:41,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:41,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:41,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:41,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:41,878 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:41,886 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:49:41,920 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:49:41,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:41,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:41,995 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:41,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-10-02 11:49:41,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 11:49:41,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 11:49:41,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:49:41,997 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-10-02 11:49:42,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:42,293 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-02 11:49:42,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 11:49:42,294 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-10-02 11:49:42,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:42,294 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:49:42,294 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:49:42,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=347, Invalid=583, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:49:42,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:49:42,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-10-02 11:49:42,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-02 11:49:42,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-02 11:49:42,302 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2018-10-02 11:49:42,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:42,302 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-02 11:49:42,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 11:49:42,302 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-02 11:49:42,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-02 11:49:42,303 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:42,303 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-10-02 11:49:42,303 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:42,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:42,303 INFO L82 PathProgramCache]: Analyzing trace with hash 75236667, now seen corresponding path program 23 times [2018-10-02 11:49:42,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:42,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:42,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:42,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:42,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:42,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:42,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:42,735 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:42,742 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:49:42,780 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-02 11:49:42,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:42,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:43,373 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:43,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 53 [2018-10-02 11:49:43,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 11:49:43,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 11:49:43,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=2263, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:49:43,375 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 54 states. [2018-10-02 11:49:43,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:43,881 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-10-02 11:49:43,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 11:49:43,882 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-10-02 11:49:43,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:43,883 INFO L225 Difference]: With dead ends: 86 [2018-10-02 11:49:43,883 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:49:43,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=911, Invalid=3511, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:49:43,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:49:43,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-02 11:49:43,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-02 11:49:43,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-02 11:49:43,893 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-10-02 11:49:43,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:43,893 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-02 11:49:43,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 11:49:43,893 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-02 11:49:43,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-02 11:49:43,894 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:43,894 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-10-02 11:49:43,894 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:43,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:43,894 INFO L82 PathProgramCache]: Analyzing trace with hash 608196725, now seen corresponding path program 24 times [2018-10-02 11:49:43,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:43,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:43,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:43,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:43,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:44,678 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:44,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:44,679 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:44,687 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:49:44,732 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-02 11:49:44,732 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:44,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:44,772 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:44,792 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:44,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-10-02 11:49:44,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-02 11:49:44,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-02 11:49:44,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:49:44,794 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-10-02 11:49:45,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:45,094 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-10-02 11:49:45,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 11:49:45,095 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2018-10-02 11:49:45,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:45,095 INFO L225 Difference]: With dead ends: 65 [2018-10-02 11:49:45,096 INFO L226 Difference]: Without dead ends: 63 [2018-10-02 11:49:45,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:49:45,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-02 11:49:45,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-10-02 11:49:45,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-02 11:49:45,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-02 11:49:45,105 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-10-02 11:49:45,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:45,105 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-02 11:49:45,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-02 11:49:45,105 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-02 11:49:45,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-02 11:49:45,105 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:45,105 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-10-02 11:49:45,106 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:45,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:45,106 INFO L82 PathProgramCache]: Analyzing trace with hash 361552815, now seen corresponding path program 25 times [2018-10-02 11:49:45,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:45,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:45,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:45,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:45,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:46,126 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:46,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:46,127 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:46,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:49:46,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:46,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:46,824 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:46,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:46,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 57 [2018-10-02 11:49:46,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-02 11:49:46,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-02 11:49:46,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=2619, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:49:46,847 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 58 states. [2018-10-02 11:49:47,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:47,840 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-10-02 11:49:47,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 11:49:47,840 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-10-02 11:49:47,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:47,841 INFO L225 Difference]: With dead ends: 92 [2018-10-02 11:49:47,841 INFO L226 Difference]: Without dead ends: 61 [2018-10-02 11:49:47,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1044, Invalid=4068, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:49:47,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-02 11:49:47,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-02 11:49:47,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-02 11:49:47,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-10-02 11:49:47,850 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-10-02 11:49:47,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:47,851 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-10-02 11:49:47,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-02 11:49:47,851 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-10-02 11:49:47,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-02 11:49:47,851 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:47,851 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-10-02 11:49:47,852 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:47,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:47,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1210122729, now seen corresponding path program 26 times [2018-10-02 11:49:47,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:47,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:47,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:47,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:49:47,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:48,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:48,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:48,090 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:49:48,127 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:49:48,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:48,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:48,169 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:48,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-10-02 11:49:48,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 11:49:48,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 11:49:48,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:49:48,170 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-10-02 11:49:48,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:48,430 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-10-02 11:49:48,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 11:49:48,430 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-10-02 11:49:48,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:48,431 INFO L225 Difference]: With dead ends: 69 [2018-10-02 11:49:48,431 INFO L226 Difference]: Without dead ends: 67 [2018-10-02 11:49:48,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:49:48,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-02 11:49:48,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-10-02 11:49:48,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-02 11:49:48,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-02 11:49:48,439 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-10-02 11:49:48,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:48,440 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-02 11:49:48,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 11:49:48,440 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-02 11:49:48,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-02 11:49:48,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:48,440 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-10-02 11:49:48,441 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:48,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:48,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1008142301, now seen corresponding path program 27 times [2018-10-02 11:49:48,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:48,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:48,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:48,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:48,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:48,843 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:48,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:48,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:48,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:49:48,897 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-02 11:49:48,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:48,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:50,411 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:50,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:50,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 61 [2018-10-02 11:49:50,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-02 11:49:50,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-02 11:49:50,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=3001, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:49:50,435 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 62 states. [2018-10-02 11:49:51,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:51,597 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-10-02 11:49:51,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 11:49:51,598 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-10-02 11:49:51,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:51,598 INFO L225 Difference]: With dead ends: 98 [2018-10-02 11:49:51,598 INFO L226 Difference]: Without dead ends: 65 [2018-10-02 11:49:51,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1982 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1186, Invalid=4666, Unknown=0, NotChecked=0, Total=5852 [2018-10-02 11:49:51,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-02 11:49:51,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-02 11:49:51,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-02 11:49:51,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-02 11:49:51,608 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2018-10-02 11:49:51,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:51,608 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-02 11:49:51,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-02 11:49:51,609 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-02 11:49:51,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-02 11:49:51,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:51,609 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-10-02 11:49:51,609 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:51,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:51,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1490325155, now seen corresponding path program 28 times [2018-10-02 11:49:51,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:51,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:51,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:51,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:51,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:51,839 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:51,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:51,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:51,849 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:49:51,892 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:49:51,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:51,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:52,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:52,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-10-02 11:49:52,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-02 11:49:52,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-02 11:49:52,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:49:52,029 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 21 states. [2018-10-02 11:49:52,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:52,317 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-02 11:49:52,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 11:49:52,318 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2018-10-02 11:49:52,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:52,319 INFO L225 Difference]: With dead ends: 73 [2018-10-02 11:49:52,319 INFO L226 Difference]: Without dead ends: 71 [2018-10-02 11:49:52,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=497, Invalid=835, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:49:52,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-02 11:49:52,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-10-02 11:49:52,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-02 11:49:52,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-02 11:49:52,330 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-10-02 11:49:52,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:52,330 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-02 11:49:52,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-02 11:49:52,330 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-02 11:49:52,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-02 11:49:52,330 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:52,330 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-10-02 11:49:52,331 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:52,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:52,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1978312041, now seen corresponding path program 29 times [2018-10-02 11:49:52,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:52,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:52,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:52,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:52,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:53,058 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:53,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:53,058 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:53,067 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:49:53,110 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-02 11:49:53,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:53,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:53,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:53,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 65 [2018-10-02 11:49:53,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-02 11:49:53,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-02 11:49:53,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=881, Invalid=3409, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:49:53,947 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 66 states. [2018-10-02 11:49:54,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:54,919 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-10-02 11:49:54,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 11:49:54,919 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-10-02 11:49:54,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:54,920 INFO L225 Difference]: With dead ends: 104 [2018-10-02 11:49:54,920 INFO L226 Difference]: Without dead ends: 69 [2018-10-02 11:49:54,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2266 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1337, Invalid=5305, Unknown=0, NotChecked=0, Total=6642 [2018-10-02 11:49:54,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-02 11:49:54,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-02 11:49:54,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-02 11:49:54,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-02 11:49:54,932 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-10-02 11:49:54,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:54,932 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-02 11:49:54,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-02 11:49:54,932 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-02 11:49:54,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-02 11:49:54,933 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:54,933 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-10-02 11:49:54,933 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:54,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:54,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1465604399, now seen corresponding path program 30 times [2018-10-02 11:49:54,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:54,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:54,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:54,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:54,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:55,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:55,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:55,239 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:49:55,376 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-02 11:49:55,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:55,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:55,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:55,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-10-02 11:49:55,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 11:49:55,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 11:49:55,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:49:55,426 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-10-02 11:49:55,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:55,716 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-10-02 11:49:55,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 11:49:55,717 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-10-02 11:49:55,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:55,718 INFO L225 Difference]: With dead ends: 77 [2018-10-02 11:49:55,718 INFO L226 Difference]: Without dead ends: 75 [2018-10-02 11:49:55,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=553, Invalid=929, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:49:55,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-02 11:49:55,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2018-10-02 11:49:55,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-02 11:49:55,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-10-02 11:49:55,731 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2018-10-02 11:49:55,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:55,732 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-10-02 11:49:55,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 11:49:55,732 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-10-02 11:49:55,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-02 11:49:55,732 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:55,732 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-10-02 11:49:55,733 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:55,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:55,733 INFO L82 PathProgramCache]: Analyzing trace with hash 303497995, now seen corresponding path program 31 times [2018-10-02 11:49:55,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:55,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:55,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:55,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:55,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:56,286 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:56,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:56,287 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:56,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:49:56,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:56,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:57,319 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:57,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:57,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 69 [2018-10-02 11:49:57,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-02 11:49:57,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-02 11:49:57,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=987, Invalid=3843, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:49:57,340 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 70 states. [2018-10-02 11:49:58,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:58,678 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-10-02 11:49:58,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 11:49:58,678 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-10-02 11:49:58,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:58,679 INFO L225 Difference]: With dead ends: 110 [2018-10-02 11:49:58,679 INFO L226 Difference]: Without dead ends: 73 [2018-10-02 11:49:58,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2569 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1497, Invalid=5985, Unknown=0, NotChecked=0, Total=7482 [2018-10-02 11:49:58,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-02 11:49:58,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-02 11:49:58,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-02 11:49:58,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-02 11:49:58,689 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2018-10-02 11:49:58,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:58,689 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-02 11:49:58,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-02 11:49:58,689 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-02 11:49:58,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-02 11:49:58,689 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:58,689 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-10-02 11:49:58,690 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:58,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:58,690 INFO L82 PathProgramCache]: Analyzing trace with hash -2091802043, now seen corresponding path program 32 times [2018-10-02 11:49:58,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:58,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:58,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:58,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:49:58,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:49:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:59,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:49:59,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:49:59,108 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:49:59,150 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:49:59,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:49:59,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:49:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:49:59,202 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:49:59,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-10-02 11:49:59,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-02 11:49:59,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-02 11:49:59,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:49:59,203 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2018-10-02 11:49:59,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:49:59,554 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-10-02 11:49:59,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 11:49:59,555 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2018-10-02 11:49:59,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:49:59,556 INFO L225 Difference]: With dead ends: 81 [2018-10-02 11:49:59,556 INFO L226 Difference]: Without dead ends: 79 [2018-10-02 11:49:59,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=612, Invalid=1028, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:49:59,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-02 11:49:59,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-10-02 11:49:59,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-02 11:49:59,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-02 11:49:59,567 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-10-02 11:49:59,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:49:59,567 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-02 11:49:59,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-02 11:49:59,568 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-02 11:49:59,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-02 11:49:59,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:49:59,568 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-10-02 11:49:59,568 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:49:59,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:49:59,568 INFO L82 PathProgramCache]: Analyzing trace with hash -177016449, now seen corresponding path program 33 times [2018-10-02 11:49:59,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:49:59,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:49:59,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:59,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:49:59,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:49:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:00,526 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:00,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:00,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:00,535 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:50:00,594 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-02 11:50:00,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:00,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:01,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:01,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 73 [2018-10-02 11:50:01,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-02 11:50:01,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-02 11:50:01,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1099, Invalid=4303, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:50:01,650 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 74 states. [2018-10-02 11:50:03,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:03,004 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-10-02 11:50:03,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 11:50:03,004 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-10-02 11:50:03,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:03,005 INFO L225 Difference]: With dead ends: 116 [2018-10-02 11:50:03,005 INFO L226 Difference]: Without dead ends: 77 [2018-10-02 11:50:03,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2891 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1666, Invalid=6706, Unknown=0, NotChecked=0, Total=8372 [2018-10-02 11:50:03,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-02 11:50:03,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-02 11:50:03,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-02 11:50:03,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-10-02 11:50:03,016 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-10-02 11:50:03,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:03,016 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-10-02 11:50:03,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-02 11:50:03,017 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-10-02 11:50:03,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-02 11:50:03,017 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:03,017 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-10-02 11:50:03,017 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:03,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:03,018 INFO L82 PathProgramCache]: Analyzing trace with hash -42507335, now seen corresponding path program 34 times [2018-10-02 11:50:03,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:03,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:03,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:03,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:03,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:03,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:03,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:03,345 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:50:03,393 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:50:03,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:03,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:03,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:03,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-10-02 11:50:03,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 11:50:03,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 11:50:03,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:50:03,449 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-10-02 11:50:03,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:03,821 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-02 11:50:03,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 11:50:03,821 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-10-02 11:50:03,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:03,822 INFO L225 Difference]: With dead ends: 85 [2018-10-02 11:50:03,822 INFO L226 Difference]: Without dead ends: 83 [2018-10-02 11:50:03,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=674, Invalid=1132, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:50:03,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-02 11:50:03,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-10-02 11:50:03,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-02 11:50:03,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-02 11:50:03,839 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2018-10-02 11:50:03,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:03,839 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-02 11:50:03,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 11:50:03,839 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-02 11:50:03,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-02 11:50:03,840 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:03,840 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-10-02 11:50:03,840 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:03,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:03,840 INFO L82 PathProgramCache]: Analyzing trace with hash 2100176371, now seen corresponding path program 35 times [2018-10-02 11:50:03,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:03,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:03,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:03,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:03,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:04,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:04,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:04,431 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:50:04,485 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-02 11:50:04,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:04,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:05,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:05,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 77 [2018-10-02 11:50:05,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-02 11:50:05,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-02 11:50:05,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=4789, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:50:05,647 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 78 states. [2018-10-02 11:50:06,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:06,675 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-10-02 11:50:06,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 11:50:06,675 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-10-02 11:50:06,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:06,676 INFO L225 Difference]: With dead ends: 122 [2018-10-02 11:50:06,676 INFO L226 Difference]: Without dead ends: 81 [2018-10-02 11:50:06,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3232 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1844, Invalid=7468, Unknown=0, NotChecked=0, Total=9312 [2018-10-02 11:50:06,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-02 11:50:06,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-02 11:50:06,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-02 11:50:06,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-02 11:50:06,692 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-10-02 11:50:06,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:06,692 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-02 11:50:06,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-02 11:50:06,692 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-02 11:50:06,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-02 11:50:06,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:06,693 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-10-02 11:50:06,693 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:06,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:06,693 INFO L82 PathProgramCache]: Analyzing trace with hash 752544557, now seen corresponding path program 36 times [2018-10-02 11:50:06,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:06,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:06,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:06,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:06,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:07,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:07,535 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:07,544 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:50:07,605 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-02 11:50:07,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:07,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:07,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:07,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-10-02 11:50:07,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-02 11:50:07,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-02 11:50:07,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:50:07,666 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 25 states. [2018-10-02 11:50:08,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:08,302 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-10-02 11:50:08,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 11:50:08,304 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2018-10-02 11:50:08,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:08,305 INFO L225 Difference]: With dead ends: 89 [2018-10-02 11:50:08,305 INFO L226 Difference]: Without dead ends: 87 [2018-10-02 11:50:08,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=739, Invalid=1241, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:50:08,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-02 11:50:08,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2018-10-02 11:50:08,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-02 11:50:08,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-02 11:50:08,320 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-10-02 11:50:08,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:08,321 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-02 11:50:08,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-02 11:50:08,321 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-02 11:50:08,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-02 11:50:08,321 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:08,321 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-10-02 11:50:08,322 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:08,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:08,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1640865895, now seen corresponding path program 37 times [2018-10-02 11:50:08,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:08,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:08,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:08,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:08,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:09,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:09,581 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:09,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:50:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:09,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:10,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:10,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 81 [2018-10-02 11:50:10,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-02 11:50:10,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-02 11:50:10,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1341, Invalid=5301, Unknown=0, NotChecked=0, Total=6642 [2018-10-02 11:50:10,849 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 82 states. [2018-10-02 11:50:12,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:12,289 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-10-02 11:50:12,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 11:50:12,290 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-10-02 11:50:12,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:12,290 INFO L225 Difference]: With dead ends: 128 [2018-10-02 11:50:12,290 INFO L226 Difference]: Without dead ends: 85 [2018-10-02 11:50:12,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3592 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2031, Invalid=8271, Unknown=0, NotChecked=0, Total=10302 [2018-10-02 11:50:12,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-02 11:50:12,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-02 11:50:12,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-02 11:50:12,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-02 11:50:12,303 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-10-02 11:50:12,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:12,303 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-02 11:50:12,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-02 11:50:12,303 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-02 11:50:12,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-02 11:50:12,303 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:12,303 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-10-02 11:50:12,304 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:12,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:12,304 INFO L82 PathProgramCache]: Analyzing trace with hash 918632609, now seen corresponding path program 38 times [2018-10-02 11:50:12,304 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:12,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:12,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:12,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:50:12,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:12,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:12,619 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:12,626 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:50:12,675 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:50:12,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:12,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:12,726 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:12,745 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:12,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-10-02 11:50:12,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 11:50:12,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 11:50:12,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:50:12,746 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-10-02 11:50:13,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:13,222 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-10-02 11:50:13,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 11:50:13,223 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-10-02 11:50:13,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:13,223 INFO L225 Difference]: With dead ends: 93 [2018-10-02 11:50:13,223 INFO L226 Difference]: Without dead ends: 91 [2018-10-02 11:50:13,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=807, Invalid=1355, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:50:13,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-02 11:50:13,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2018-10-02 11:50:13,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-02 11:50:13,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-02 11:50:13,238 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-10-02 11:50:13,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:13,238 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-02 11:50:13,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 11:50:13,238 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-02 11:50:13,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-02 11:50:13,238 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:13,238 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-10-02 11:50:13,239 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:13,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:13,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1957273381, now seen corresponding path program 39 times [2018-10-02 11:50:13,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:13,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:13,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:13,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:13,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:14,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:14,127 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:14,134 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:50:14,217 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-02 11:50:14,217 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:14,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:15,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:15,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 85 [2018-10-02 11:50:15,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-02 11:50:15,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-02 11:50:15,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1471, Invalid=5839, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:50:15,540 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 86 states. [2018-10-02 11:50:16,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:16,733 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-10-02 11:50:16,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 11:50:16,734 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-10-02 11:50:16,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:16,734 INFO L225 Difference]: With dead ends: 134 [2018-10-02 11:50:16,734 INFO L226 Difference]: Without dead ends: 89 [2018-10-02 11:50:16,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3971 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2227, Invalid=9115, Unknown=0, NotChecked=0, Total=11342 [2018-10-02 11:50:16,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-02 11:50:16,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-02 11:50:16,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-02 11:50:16,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-10-02 11:50:16,747 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2018-10-02 11:50:16,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:16,748 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-10-02 11:50:16,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-02 11:50:16,748 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-10-02 11:50:16,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-02 11:50:16,748 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:16,748 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-10-02 11:50:16,748 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:16,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:16,749 INFO L82 PathProgramCache]: Analyzing trace with hash 267340821, now seen corresponding path program 40 times [2018-10-02 11:50:16,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:16,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:16,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:16,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:16,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:17,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:17,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:17,181 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:50:17,236 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:50:17,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:17,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:17,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:17,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-10-02 11:50:17,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-02 11:50:17,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-02 11:50:17,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:50:17,313 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 27 states. [2018-10-02 11:50:17,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:17,746 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-02 11:50:17,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 11:50:17,747 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2018-10-02 11:50:17,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:17,748 INFO L225 Difference]: With dead ends: 97 [2018-10-02 11:50:17,748 INFO L226 Difference]: Without dead ends: 95 [2018-10-02 11:50:17,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=878, Invalid=1474, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:50:17,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-02 11:50:17,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2018-10-02 11:50:17,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-02 11:50:17,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-02 11:50:17,764 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-10-02 11:50:17,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:17,765 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-02 11:50:17,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-02 11:50:17,765 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-02 11:50:17,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-02 11:50:17,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:17,765 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-10-02 11:50:17,765 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:17,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:17,766 INFO L82 PathProgramCache]: Analyzing trace with hash -783456433, now seen corresponding path program 41 times [2018-10-02 11:50:17,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:17,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:17,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:17,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:17,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:18,711 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:18,711 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:18,711 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:18,719 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:50:18,787 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-02 11:50:18,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:18,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:20,392 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:20,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 89 [2018-10-02 11:50:20,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-02 11:50:20,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-02 11:50:20,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1607, Invalid=6403, Unknown=0, NotChecked=0, Total=8010 [2018-10-02 11:50:20,393 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 90 states. [2018-10-02 11:50:21,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:21,757 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-10-02 11:50:21,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 11:50:21,757 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-10-02 11:50:21,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:21,758 INFO L225 Difference]: With dead ends: 140 [2018-10-02 11:50:21,758 INFO L226 Difference]: Without dead ends: 93 [2018-10-02 11:50:21,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4369 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2432, Invalid=10000, Unknown=0, NotChecked=0, Total=12432 [2018-10-02 11:50:21,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-02 11:50:21,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-02 11:50:21,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-02 11:50:21,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-10-02 11:50:21,772 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-10-02 11:50:21,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:21,773 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-10-02 11:50:21,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-02 11:50:21,773 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-10-02 11:50:21,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-02 11:50:21,773 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:21,774 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-10-02 11:50:21,774 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:21,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:21,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1017783689, now seen corresponding path program 42 times [2018-10-02 11:50:21,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:21,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:21,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:21,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:21,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:21,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:22,240 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:22,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:22,241 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:22,249 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:50:22,316 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-02 11:50:22,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:22,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:22,738 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:22,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-10-02 11:50:22,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 11:50:22,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 11:50:22,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:50:22,739 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-10-02 11:50:24,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:24,116 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-10-02 11:50:24,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 11:50:24,117 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-10-02 11:50:24,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:24,118 INFO L225 Difference]: With dead ends: 101 [2018-10-02 11:50:24,118 INFO L226 Difference]: Without dead ends: 99 [2018-10-02 11:50:24,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=952, Invalid=1598, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:50:24,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-02 11:50:24,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-10-02 11:50:24,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-02 11:50:24,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-10-02 11:50:24,133 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2018-10-02 11:50:24,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:24,134 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-10-02 11:50:24,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 11:50:24,134 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-10-02 11:50:24,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-02 11:50:24,134 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:24,134 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-10-02 11:50:24,135 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:24,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:24,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1162366013, now seen corresponding path program 43 times [2018-10-02 11:50:24,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:24,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:24,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:24,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:24,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:24,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:25,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:25,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:25,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:25,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:50:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:25,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:26,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:26,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:26,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 93 [2018-10-02 11:50:26,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-02 11:50:26,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-02 11:50:26,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1749, Invalid=6993, Unknown=0, NotChecked=0, Total=8742 [2018-10-02 11:50:26,716 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 94 states. [2018-10-02 11:50:28,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:28,767 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-10-02 11:50:28,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 11:50:28,768 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-10-02 11:50:28,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:28,768 INFO L225 Difference]: With dead ends: 146 [2018-10-02 11:50:28,768 INFO L226 Difference]: Without dead ends: 97 [2018-10-02 11:50:28,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4786 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2646, Invalid=10926, Unknown=0, NotChecked=0, Total=13572 [2018-10-02 11:50:28,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-02 11:50:28,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-02 11:50:28,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-02 11:50:28,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-10-02 11:50:28,783 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2018-10-02 11:50:28,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:28,783 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-10-02 11:50:28,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-02 11:50:28,783 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-10-02 11:50:28,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-02 11:50:28,784 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:28,784 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-10-02 11:50:28,784 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:28,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:28,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1867070211, now seen corresponding path program 44 times [2018-10-02 11:50:28,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:28,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:28,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:28,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:50:28,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:29,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:29,195 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:29,195 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:29,205 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:50:29,264 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:50:29,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:29,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:29,332 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:29,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-10-02 11:50:29,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 11:50:29,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 11:50:29,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:50:29,333 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 29 states. [2018-10-02 11:50:29,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:29,787 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-10-02 11:50:29,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 11:50:29,787 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2018-10-02 11:50:29,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:29,788 INFO L225 Difference]: With dead ends: 105 [2018-10-02 11:50:29,788 INFO L226 Difference]: Without dead ends: 103 [2018-10-02 11:50:29,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1029, Invalid=1727, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:50:29,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-02 11:50:29,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-10-02 11:50:29,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-02 11:50:29,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-02 11:50:29,806 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-10-02 11:50:29,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:29,806 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-02 11:50:29,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 11:50:29,806 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-02 11:50:29,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-02 11:50:29,807 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:29,807 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-10-02 11:50:29,807 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:29,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:29,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1041909303, now seen corresponding path program 45 times [2018-10-02 11:50:29,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:29,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:29,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:29,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:29,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:30,748 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:30,748 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:30,757 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:50:30,832 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-02 11:50:30,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:30,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:32,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:32,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2018-10-02 11:50:32,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-02 11:50:32,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-02 11:50:32,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1897, Invalid=7609, Unknown=0, NotChecked=0, Total=9506 [2018-10-02 11:50:32,491 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 98 states. [2018-10-02 11:50:34,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:34,263 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-10-02 11:50:34,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 11:50:34,263 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-10-02 11:50:34,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:34,264 INFO L225 Difference]: With dead ends: 152 [2018-10-02 11:50:34,264 INFO L226 Difference]: Without dead ends: 101 [2018-10-02 11:50:34,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5222 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2869, Invalid=11893, Unknown=0, NotChecked=0, Total=14762 [2018-10-02 11:50:34,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-02 11:50:34,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-02 11:50:34,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-02 11:50:34,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-10-02 11:50:34,281 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-10-02 11:50:34,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:34,282 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-10-02 11:50:34,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-02 11:50:34,282 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-10-02 11:50:34,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-02 11:50:34,282 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:34,282 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-10-02 11:50:34,282 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:34,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:34,283 INFO L82 PathProgramCache]: Analyzing trace with hash -279303567, now seen corresponding path program 46 times [2018-10-02 11:50:34,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:34,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:34,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:34,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:34,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:34,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:34,722 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:34,731 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:50:34,794 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:50:34,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:34,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:34,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:34,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-10-02 11:50:34,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 11:50:34,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 11:50:34,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:50:34,898 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-10-02 11:50:35,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:35,973 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-02 11:50:35,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 11:50:35,974 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-10-02 11:50:35,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:35,974 INFO L225 Difference]: With dead ends: 109 [2018-10-02 11:50:35,975 INFO L226 Difference]: Without dead ends: 107 [2018-10-02 11:50:35,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1109, Invalid=1861, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:50:35,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-02 11:50:35,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-10-02 11:50:35,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-02 11:50:35,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-02 11:50:35,994 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2018-10-02 11:50:35,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:35,995 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-02 11:50:35,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 11:50:35,995 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-02 11:50:35,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-02 11:50:35,995 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:35,995 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-10-02 11:50:35,995 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:35,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:35,996 INFO L82 PathProgramCache]: Analyzing trace with hash -2122703189, now seen corresponding path program 47 times [2018-10-02 11:50:35,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:35,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:35,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:35,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:35,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:37,221 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:37,221 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:37,228 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:50:37,313 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-02 11:50:37,313 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:37,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:39,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:39,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:39,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 101 [2018-10-02 11:50:39,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-02 11:50:39,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-02 11:50:39,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2051, Invalid=8251, Unknown=0, NotChecked=0, Total=10302 [2018-10-02 11:50:39,326 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 102 states. [2018-10-02 11:50:40,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:40,753 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-10-02 11:50:40,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 11:50:40,754 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-10-02 11:50:40,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:40,754 INFO L225 Difference]: With dead ends: 158 [2018-10-02 11:50:40,754 INFO L226 Difference]: Without dead ends: 105 [2018-10-02 11:50:40,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5677 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3101, Invalid=12901, Unknown=0, NotChecked=0, Total=16002 [2018-10-02 11:50:40,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-02 11:50:40,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-02 11:50:40,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-02 11:50:40,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-02 11:50:40,777 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-10-02 11:50:40,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:40,778 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-02 11:50:40,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-02 11:50:40,778 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-02 11:50:40,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-02 11:50:40,778 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:40,779 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-10-02 11:50:40,779 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:40,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:40,779 INFO L82 PathProgramCache]: Analyzing trace with hash 190404069, now seen corresponding path program 48 times [2018-10-02 11:50:40,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:40,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:40,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:40,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:40,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:42,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:42,047 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:42,054 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:50:42,136 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-02 11:50:42,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:42,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:42,456 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:42,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-10-02 11:50:42,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-02 11:50:42,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-02 11:50:42,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:50:42,457 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 31 states. [2018-10-02 11:50:43,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:43,085 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-10-02 11:50:43,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 11:50:43,085 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 104 [2018-10-02 11:50:43,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:43,086 INFO L225 Difference]: With dead ends: 113 [2018-10-02 11:50:43,087 INFO L226 Difference]: Without dead ends: 111 [2018-10-02 11:50:43,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1192, Invalid=2000, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 11:50:43,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-02 11:50:43,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2018-10-02 11:50:43,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-02 11:50:43,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-10-02 11:50:43,107 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-10-02 11:50:43,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:43,108 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-10-02 11:50:43,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-02 11:50:43,108 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-10-02 11:50:43,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-02 11:50:43,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:43,109 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-10-02 11:50:43,109 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:43,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:43,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1705231073, now seen corresponding path program 49 times [2018-10-02 11:50:43,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:43,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:43,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:43,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:43,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:43,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:44,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:44,619 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:44,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:50:44,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:44,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:46,709 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:46,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 105 [2018-10-02 11:50:46,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-02 11:50:46,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-02 11:50:46,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=8919, Unknown=0, NotChecked=0, Total=11130 [2018-10-02 11:50:46,711 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 106 states. [2018-10-02 11:50:48,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:48,384 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-10-02 11:50:48,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 11:50:48,384 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-10-02 11:50:48,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:48,385 INFO L225 Difference]: With dead ends: 164 [2018-10-02 11:50:48,385 INFO L226 Difference]: Without dead ends: 109 [2018-10-02 11:50:48,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6151 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3342, Invalid=13950, Unknown=0, NotChecked=0, Total=17292 [2018-10-02 11:50:48,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-02 11:50:48,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-02 11:50:48,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-02 11:50:48,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-10-02 11:50:48,403 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-10-02 11:50:48,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:48,404 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-10-02 11:50:48,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-02 11:50:48,404 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-10-02 11:50:48,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-02 11:50:48,404 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:48,404 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-10-02 11:50:48,405 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:48,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:48,405 INFO L82 PathProgramCache]: Analyzing trace with hash 653870937, now seen corresponding path program 50 times [2018-10-02 11:50:48,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:48,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:48,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:48,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:50:48,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:49,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:49,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:49,422 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:50:49,487 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:50:49,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:49,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:49,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:49,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-10-02 11:50:49,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 11:50:49,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 11:50:49,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:50:49,563 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-10-02 11:50:50,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:50,096 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-10-02 11:50:50,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 11:50:50,097 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-10-02 11:50:50,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:50,097 INFO L225 Difference]: With dead ends: 117 [2018-10-02 11:50:50,097 INFO L226 Difference]: Without dead ends: 115 [2018-10-02 11:50:50,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1278, Invalid=2144, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:50:50,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-02 11:50:50,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2018-10-02 11:50:50,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-02 11:50:50,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-02 11:50:50,120 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-10-02 11:50:50,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:50,121 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-02 11:50:50,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 11:50:50,121 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-02 11:50:50,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-02 11:50:50,122 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:50,122 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-10-02 11:50:50,122 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:50,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:50,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1304797587, now seen corresponding path program 51 times [2018-10-02 11:50:50,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:50,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:50,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:50,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:50,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:51,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:51,299 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:51,308 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:50:51,401 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-02 11:50:51,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:51,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:53,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:53,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 109 [2018-10-02 11:50:53,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-02 11:50:53,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-02 11:50:53,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2377, Invalid=9613, Unknown=0, NotChecked=0, Total=11990 [2018-10-02 11:50:53,659 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 110 states. [2018-10-02 11:50:56,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:56,090 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-10-02 11:50:56,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 11:50:56,090 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-10-02 11:50:56,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:56,091 INFO L225 Difference]: With dead ends: 170 [2018-10-02 11:50:56,091 INFO L226 Difference]: Without dead ends: 113 [2018-10-02 11:50:56,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6644 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3592, Invalid=15040, Unknown=0, NotChecked=0, Total=18632 [2018-10-02 11:50:56,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-02 11:50:56,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-02 11:50:56,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-02 11:50:56,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-10-02 11:50:56,110 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2018-10-02 11:50:56,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:56,110 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-10-02 11:50:56,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-02 11:50:56,110 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-10-02 11:50:56,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-02 11:50:56,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:56,111 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-10-02 11:50:56,111 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:56,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:56,111 INFO L82 PathProgramCache]: Analyzing trace with hash -738263347, now seen corresponding path program 52 times [2018-10-02 11:50:56,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:56,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:56,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:56,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:56,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:56,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:56,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:56,624 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:50:56,690 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:50:56,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:56,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:56,863 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:56,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-10-02 11:50:56,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-02 11:50:56,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-02 11:50:56,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:50:56,864 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 33 states. [2018-10-02 11:50:57,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:57,427 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-02 11:50:57,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 11:50:57,428 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 112 [2018-10-02 11:50:57,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:57,429 INFO L225 Difference]: With dead ends: 121 [2018-10-02 11:50:57,429 INFO L226 Difference]: Without dead ends: 119 [2018-10-02 11:50:57,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1367, Invalid=2293, Unknown=0, NotChecked=0, Total=3660 [2018-10-02 11:50:57,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-02 11:50:57,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-10-02 11:50:57,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-02 11:50:57,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-02 11:50:57,451 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-10-02 11:50:57,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:57,451 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-02 11:50:57,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-02 11:50:57,451 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-02 11:50:57,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-02 11:50:57,452 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:57,452 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-10-02 11:50:57,452 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:57,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:57,452 INFO L82 PathProgramCache]: Analyzing trace with hash -801420281, now seen corresponding path program 53 times [2018-10-02 11:50:57,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:57,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:57,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:57,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:57,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:58,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:58,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:50:58,857 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:50:58,942 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-02 11:50:58,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:58,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:01,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:01,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:01,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 113 [2018-10-02 11:51:01,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-02 11:51:01,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-02 11:51:01,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2549, Invalid=10333, Unknown=0, NotChecked=0, Total=12882 [2018-10-02 11:51:01,492 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 114 states. [2018-10-02 11:51:02,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:02,614 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-10-02 11:51:02,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-02 11:51:02,614 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-10-02 11:51:02,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:02,615 INFO L225 Difference]: With dead ends: 176 [2018-10-02 11:51:02,615 INFO L226 Difference]: Without dead ends: 117 [2018-10-02 11:51:02,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7156 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3851, Invalid=16171, Unknown=0, NotChecked=0, Total=20022 [2018-10-02 11:51:02,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-02 11:51:02,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-02 11:51:02,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-02 11:51:02,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-10-02 11:51:02,636 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-10-02 11:51:02,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:02,636 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-10-02 11:51:02,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-02 11:51:02,636 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-10-02 11:51:02,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-02 11:51:02,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:02,637 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-10-02 11:51:02,637 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:02,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:02,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1280345023, now seen corresponding path program 54 times [2018-10-02 11:51:02,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:02,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:02,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:02,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:02,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:03,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:03,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:03,076 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:51:03,082 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:51:03,173 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-10-02 11:51:03,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:03,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:03,340 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:03,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-10-02 11:51:03,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 11:51:03,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 11:51:03,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:51:03,341 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-10-02 11:51:03,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:03,923 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-10-02 11:51:03,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-02 11:51:03,923 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-10-02 11:51:03,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:03,924 INFO L225 Difference]: With dead ends: 125 [2018-10-02 11:51:03,924 INFO L226 Difference]: Without dead ends: 123 [2018-10-02 11:51:03,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1459, Invalid=2447, Unknown=0, NotChecked=0, Total=3906 [2018-10-02 11:51:03,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-02 11:51:03,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-10-02 11:51:03,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-02 11:51:03,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-10-02 11:51:03,944 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2018-10-02 11:51:03,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:03,945 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-10-02 11:51:03,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 11:51:03,945 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-10-02 11:51:03,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-02 11:51:03,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:03,945 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-10-02 11:51:03,945 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:03,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:03,946 INFO L82 PathProgramCache]: Analyzing trace with hash -2050868101, now seen corresponding path program 55 times [2018-10-02 11:51:03,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:03,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:03,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:03,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:03,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:05,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:05,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:05,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:51:05,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:51:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:05,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:08,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:08,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 117 [2018-10-02 11:51:08,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-02 11:51:08,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-02 11:51:08,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2727, Invalid=11079, Unknown=0, NotChecked=0, Total=13806 [2018-10-02 11:51:08,690 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 118 states. [2018-10-02 11:51:11,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:11,956 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-10-02 11:51:11,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-02 11:51:11,956 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 118 [2018-10-02 11:51:11,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:11,956 INFO L225 Difference]: With dead ends: 182 [2018-10-02 11:51:11,957 INFO L226 Difference]: Without dead ends: 121 [2018-10-02 11:51:11,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7687 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=4119, Invalid=17343, Unknown=0, NotChecked=0, Total=21462 [2018-10-02 11:51:11,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-02 11:51:11,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-02 11:51:11,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-02 11:51:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-10-02 11:51:11,984 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2018-10-02 11:51:11,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:11,984 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-10-02 11:51:11,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-02 11:51:11,984 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-10-02 11:51:11,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-02 11:51:11,984 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:11,984 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-10-02 11:51:11,985 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:11,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:11,985 INFO L82 PathProgramCache]: Analyzing trace with hash 919584693, now seen corresponding path program 56 times [2018-10-02 11:51:11,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:11,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:11,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:11,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:51:11,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:12,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:12,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:51:12,599 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:51:12,664 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:51:12,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:12,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:12,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:12,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:12,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-10-02 11:51:12,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-02 11:51:12,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-02 11:51:12,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:51:12,761 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 35 states. [2018-10-02 11:51:13,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:13,371 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-10-02 11:51:13,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-02 11:51:13,372 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2018-10-02 11:51:13,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:13,373 INFO L225 Difference]: With dead ends: 129 [2018-10-02 11:51:13,373 INFO L226 Difference]: Without dead ends: 127 [2018-10-02 11:51:13,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1554, Invalid=2606, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:51:13,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-02 11:51:13,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2018-10-02 11:51:13,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-02 11:51:13,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-10-02 11:51:13,395 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-10-02 11:51:13,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:13,395 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-10-02 11:51:13,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-02 11:51:13,395 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-10-02 11:51:13,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-02 11:51:13,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:13,396 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-10-02 11:51:13,396 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:13,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:13,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1042320657, now seen corresponding path program 57 times [2018-10-02 11:51:13,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:13,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:13,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:13,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:13,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:15,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:15,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:51:15,025 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:51:15,123 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-02 11:51:15,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:15,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:17,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:17,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:17,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 121 [2018-10-02 11:51:17,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-02 11:51:17,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-02 11:51:17,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2911, Invalid=11851, Unknown=0, NotChecked=0, Total=14762 [2018-10-02 11:51:17,772 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 122 states. [2018-10-02 11:51:21,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:21,229 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-10-02 11:51:21,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-02 11:51:21,229 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 122 [2018-10-02 11:51:21,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:21,230 INFO L225 Difference]: With dead ends: 188 [2018-10-02 11:51:21,230 INFO L226 Difference]: Without dead ends: 125 [2018-10-02 11:51:21,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8237 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=4396, Invalid=18556, Unknown=0, NotChecked=0, Total=22952 [2018-10-02 11:51:21,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-02 11:51:21,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-02 11:51:21,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-02 11:51:21,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-10-02 11:51:21,253 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-10-02 11:51:21,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:21,253 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-10-02 11:51:21,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-02 11:51:21,253 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-10-02 11:51:21,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-02 11:51:21,253 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:21,253 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-10-02 11:51:21,254 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:21,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:21,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1571080489, now seen corresponding path program 58 times [2018-10-02 11:51:21,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:21,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:21,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:21,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:21,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:22,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:22,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:22,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:51:22,053 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:51:22,135 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:51:22,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:22,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:22,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:22,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-10-02 11:51:22,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 11:51:22,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 11:51:22,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:51:22,213 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-10-02 11:51:22,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:22,853 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-10-02 11:51:22,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 11:51:22,854 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-10-02 11:51:22,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:22,855 INFO L225 Difference]: With dead ends: 133 [2018-10-02 11:51:22,855 INFO L226 Difference]: Without dead ends: 131 [2018-10-02 11:51:22,856 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1652, Invalid=2770, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:51:22,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-02 11:51:22,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2018-10-02 11:51:22,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-02 11:51:22,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-10-02 11:51:22,879 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2018-10-02 11:51:22,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:22,879 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-10-02 11:51:22,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 11:51:22,879 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-10-02 11:51:22,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-02 11:51:22,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:22,880 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-10-02 11:51:22,880 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:22,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:22,881 INFO L82 PathProgramCache]: Analyzing trace with hash -2020085917, now seen corresponding path program 59 times [2018-10-02 11:51:22,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:22,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:22,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:22,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:22,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:22,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:24,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:24,279 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:51:24,286 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:51:24,387 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-02 11:51:24,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:24,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:27,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:27,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 125 [2018-10-02 11:51:27,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-02 11:51:27,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-02 11:51:27,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3101, Invalid=12649, Unknown=0, NotChecked=0, Total=15750 [2018-10-02 11:51:27,334 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 126 states. [2018-10-02 11:51:30,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:30,300 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2018-10-02 11:51:30,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-02 11:51:30,300 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 126 [2018-10-02 11:51:30,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:30,301 INFO L225 Difference]: With dead ends: 194 [2018-10-02 11:51:30,301 INFO L226 Difference]: Without dead ends: 129 [2018-10-02 11:51:30,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8806 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4682, Invalid=19810, Unknown=0, NotChecked=0, Total=24492 [2018-10-02 11:51:30,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-02 11:51:30,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-02 11:51:30,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-02 11:51:30,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-10-02 11:51:30,325 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-10-02 11:51:30,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:30,325 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-10-02 11:51:30,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-02 11:51:30,325 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-10-02 11:51:30,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-02 11:51:30,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:30,326 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-10-02 11:51:30,326 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:30,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:30,326 INFO L82 PathProgramCache]: Analyzing trace with hash 2012453021, now seen corresponding path program 60 times [2018-10-02 11:51:30,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:30,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:30,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:30,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:30,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:30,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:30,878 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:51:30,887 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:51:30,991 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-10-02 11:51:30,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:30,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:31,096 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:31,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-10-02 11:51:31,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-02 11:51:31,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-02 11:51:31,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:51:31,098 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 37 states. [2018-10-02 11:51:31,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:31,788 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-10-02 11:51:31,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-02 11:51:31,788 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 128 [2018-10-02 11:51:31,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:31,789 INFO L225 Difference]: With dead ends: 137 [2018-10-02 11:51:31,789 INFO L226 Difference]: Without dead ends: 135 [2018-10-02 11:51:31,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1753, Invalid=2939, Unknown=0, NotChecked=0, Total=4692 [2018-10-02 11:51:31,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-02 11:51:31,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2018-10-02 11:51:31,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-02 11:51:31,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-10-02 11:51:31,816 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-10-02 11:51:31,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:31,816 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-10-02 11:51:31,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-02 11:51:31,816 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-10-02 11:51:31,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-02 11:51:31,817 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:31,817 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-10-02 11:51:31,817 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:31,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:31,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1232122327, now seen corresponding path program 61 times [2018-10-02 11:51:31,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:31,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:31,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:31,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:31,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:33,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:33,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:51:33,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:51:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:33,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:36,511 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:36,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 129 [2018-10-02 11:51:36,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-10-02 11:51:36,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-10-02 11:51:36,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3297, Invalid=13473, Unknown=0, NotChecked=0, Total=16770 [2018-10-02 11:51:36,513 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 130 states. [2018-10-02 11:51:38,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:38,137 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2018-10-02 11:51:38,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-02 11:51:38,137 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 130 [2018-10-02 11:51:38,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:38,138 INFO L225 Difference]: With dead ends: 200 [2018-10-02 11:51:38,138 INFO L226 Difference]: Without dead ends: 133 [2018-10-02 11:51:38,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9394 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4977, Invalid=21105, Unknown=0, NotChecked=0, Total=26082 [2018-10-02 11:51:38,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-02 11:51:38,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-02 11:51:38,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-02 11:51:38,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-10-02 11:51:38,163 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-10-02 11:51:38,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:38,163 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-10-02 11:51:38,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-10-02 11:51:38,163 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-10-02 11:51:38,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-02 11:51:38,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:38,164 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-10-02 11:51:38,164 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:38,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:38,164 INFO L82 PathProgramCache]: Analyzing trace with hash -452907503, now seen corresponding path program 62 times [2018-10-02 11:51:38,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:38,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:38,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:38,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:51:38,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:38,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:38,737 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:51:38,745 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:51:38,825 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:51:38,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:38,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:38,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:39,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:39,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-10-02 11:51:39,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 11:51:39,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 11:51:39,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:51:39,022 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-10-02 11:51:39,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:39,783 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-10-02 11:51:39,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-02 11:51:39,784 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-10-02 11:51:39,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:39,785 INFO L225 Difference]: With dead ends: 141 [2018-10-02 11:51:39,785 INFO L226 Difference]: Without dead ends: 139 [2018-10-02 11:51:39,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1857, Invalid=3113, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:51:39,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-02 11:51:39,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-10-02 11:51:39,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-02 11:51:39,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-10-02 11:51:39,812 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-10-02 11:51:39,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:39,812 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-10-02 11:51:39,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 11:51:39,812 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-10-02 11:51:39,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-02 11:51:39,813 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:39,813 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-10-02 11:51:39,813 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:39,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:39,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1452361141, now seen corresponding path program 63 times [2018-10-02 11:51:39,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:39,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:39,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:39,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:39,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:41,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:41,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:41,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:51:41,628 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:51:41,741 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-02 11:51:41,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:41,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:45,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:45,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 133 [2018-10-02 11:51:45,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-10-02 11:51:45,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-10-02 11:51:45,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3499, Invalid=14323, Unknown=0, NotChecked=0, Total=17822 [2018-10-02 11:51:45,037 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 134 states. [2018-10-02 11:51:49,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:49,107 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2018-10-02 11:51:49,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-02 11:51:49,107 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 134 [2018-10-02 11:51:49,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:49,108 INFO L225 Difference]: With dead ends: 206 [2018-10-02 11:51:49,108 INFO L226 Difference]: Without dead ends: 137 [2018-10-02 11:51:49,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10001 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5281, Invalid=22441, Unknown=0, NotChecked=0, Total=27722 [2018-10-02 11:51:49,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-02 11:51:49,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-02 11:51:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-02 11:51:49,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-10-02 11:51:49,135 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2018-10-02 11:51:49,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:49,136 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-10-02 11:51:49,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-10-02 11:51:49,136 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-10-02 11:51:49,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-02 11:51:49,136 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:49,136 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-10-02 11:51:49,137 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:49,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:49,137 INFO L82 PathProgramCache]: Analyzing trace with hash -745371259, now seen corresponding path program 64 times [2018-10-02 11:51:49,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:49,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:49,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:49,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:49,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:50,209 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:50,209 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 [2018-10-02 11:51:50,216 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:51:50,303 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:51:50,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:50,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:50,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:50,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-10-02 11:51:50,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-02 11:51:50,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-02 11:51:50,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:51:50,426 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 39 states. [2018-10-02 11:51:51,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:51,235 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-10-02 11:51:51,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-02 11:51:51,235 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 136 [2018-10-02 11:51:51,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:51,236 INFO L225 Difference]: With dead ends: 145 [2018-10-02 11:51:51,236 INFO L226 Difference]: Without dead ends: 143 [2018-10-02 11:51:51,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1964, Invalid=3292, Unknown=0, NotChecked=0, Total=5256 [2018-10-02 11:51:51,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-02 11:51:51,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-10-02 11:51:51,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-02 11:51:51,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-10-02 11:51:51,267 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-10-02 11:51:51,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:51,267 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-10-02 11:51:51,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-02 11:51:51,268 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-10-02 11:51:51,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-02 11:51:51,268 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:51,268 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-10-02 11:51:51,268 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:51,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:51,269 INFO L82 PathProgramCache]: Analyzing trace with hash 957810879, now seen corresponding path program 65 times [2018-10-02 11:51:51,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:51,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:51,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:51,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:51,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:52,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:52,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:51:52,792 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:51:52,904 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-02 11:51:52,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:52,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:56,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:56,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 137 [2018-10-02 11:51:56,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-10-02 11:51:56,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-10-02 11:51:56,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3707, Invalid=15199, Unknown=0, NotChecked=0, Total=18906 [2018-10-02 11:51:56,357 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 138 states. [2018-10-02 11:51:59,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:59,348 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-10-02 11:51:59,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-02 11:51:59,348 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 138 [2018-10-02 11:51:59,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:59,349 INFO L225 Difference]: With dead ends: 212 [2018-10-02 11:51:59,349 INFO L226 Difference]: Without dead ends: 141 [2018-10-02 11:51:59,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10627 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5594, Invalid=23818, Unknown=0, NotChecked=0, Total=29412 [2018-10-02 11:51:59,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-02 11:51:59,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-02 11:51:59,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-02 11:51:59,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-10-02 11:51:59,377 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-10-02 11:51:59,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:59,378 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-10-02 11:51:59,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-10-02 11:51:59,378 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-10-02 11:51:59,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-02 11:51:59,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:59,378 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-10-02 11:51:59,378 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:59,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:59,379 INFO L82 PathProgramCache]: Analyzing trace with hash 32287481, now seen corresponding path program 66 times [2018-10-02 11:51:59,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:59,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:59,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:59,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:59,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:59,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:59,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:51:59,989 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:52:00,107 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-10-02 11:52:00,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:00,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:00,184 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:00,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-10-02 11:52:00,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 11:52:00,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 11:52:00,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:52:00,185 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-10-02 11:52:01,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:01,151 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-10-02 11:52:01,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-02 11:52:01,152 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-10-02 11:52:01,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:01,153 INFO L225 Difference]: With dead ends: 149 [2018-10-02 11:52:01,153 INFO L226 Difference]: Without dead ends: 147 [2018-10-02 11:52:01,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2074, Invalid=3476, Unknown=0, NotChecked=0, Total=5550 [2018-10-02 11:52:01,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-02 11:52:01,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2018-10-02 11:52:01,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-02 11:52:01,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-10-02 11:52:01,191 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2018-10-02 11:52:01,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:01,191 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-10-02 11:52:01,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 11:52:01,191 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-10-02 11:52:01,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-02 11:52:01,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:01,192 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-10-02 11:52:01,192 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:01,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:01,192 INFO L82 PathProgramCache]: Analyzing trace with hash 963550515, now seen corresponding path program 67 times [2018-10-02 11:52:01,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:01,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:01,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:01,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:01,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:01,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:02,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:02,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:02,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:02,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:06,510 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:06,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 141 [2018-10-02 11:52:06,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-10-02 11:52:06,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-10-02 11:52:06,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3921, Invalid=16101, Unknown=0, NotChecked=0, Total=20022 [2018-10-02 11:52:06,512 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 142 states. [2018-10-02 11:52:10,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:10,459 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2018-10-02 11:52:10,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-02 11:52:10,459 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 142 [2018-10-02 11:52:10,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:10,460 INFO L225 Difference]: With dead ends: 218 [2018-10-02 11:52:10,460 INFO L226 Difference]: Without dead ends: 145 [2018-10-02 11:52:10,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11272 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=5916, Invalid=25236, Unknown=0, NotChecked=0, Total=31152 [2018-10-02 11:52:10,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-02 11:52:10,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-02 11:52:10,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-02 11:52:10,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-10-02 11:52:10,490 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2018-10-02 11:52:10,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:10,490 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-10-02 11:52:10,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-10-02 11:52:10,491 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-10-02 11:52:10,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-02 11:52:10,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:10,491 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-10-02 11:52:10,491 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:10,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:10,492 INFO L82 PathProgramCache]: Analyzing trace with hash 2111083117, now seen corresponding path program 68 times [2018-10-02 11:52:10,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:10,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:10,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:10,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:10,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:11,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:11,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:11,375 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:11,383 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:52:11,466 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:52:11,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:11,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:11,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:11,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-10-02 11:52:11,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 11:52:11,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 11:52:11,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:52:11,553 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 41 states. [2018-10-02 11:52:12,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:12,345 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-10-02 11:52:12,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-02 11:52:12,345 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 144 [2018-10-02 11:52:12,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:12,346 INFO L225 Difference]: With dead ends: 153 [2018-10-02 11:52:12,346 INFO L226 Difference]: Without dead ends: 151 [2018-10-02 11:52:12,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2187, Invalid=3665, Unknown=0, NotChecked=0, Total=5852 [2018-10-02 11:52:12,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-02 11:52:12,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2018-10-02 11:52:12,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-02 11:52:12,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-10-02 11:52:12,381 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-10-02 11:52:12,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:12,381 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-10-02 11:52:12,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 11:52:12,381 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-10-02 11:52:12,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-02 11:52:12,382 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:12,382 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-10-02 11:52:12,382 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:12,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:12,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1526364071, now seen corresponding path program 69 times [2018-10-02 11:52:12,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:12,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:12,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:12,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:12,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:14,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:14,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:14,195 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:52:14,331 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-02 11:52:14,332 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:14,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:17,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:17,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 145 [2018-10-02 11:52:17,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-10-02 11:52:17,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-10-02 11:52:17,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4141, Invalid=17029, Unknown=0, NotChecked=0, Total=21170 [2018-10-02 11:52:17,971 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 146 states. [2018-10-02 11:52:21,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:21,885 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2018-10-02 11:52:21,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-02 11:52:21,885 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 146 [2018-10-02 11:52:21,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:21,886 INFO L225 Difference]: With dead ends: 224 [2018-10-02 11:52:21,886 INFO L226 Difference]: Without dead ends: 149 [2018-10-02 11:52:21,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11936 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=6247, Invalid=26695, Unknown=0, NotChecked=0, Total=32942 [2018-10-02 11:52:21,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-02 11:52:21,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-02 11:52:21,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-02 11:52:21,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-10-02 11:52:21,923 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-10-02 11:52:21,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:21,923 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-10-02 11:52:21,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-10-02 11:52:21,923 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-10-02 11:52:21,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-02 11:52:21,924 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:21,924 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-10-02 11:52:21,925 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:21,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:21,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1687109601, now seen corresponding path program 70 times [2018-10-02 11:52:21,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:21,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:21,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:21,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:21,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:22,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:22,627 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:22,635 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:52:22,729 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:52:22,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:22,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:22,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:22,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-10-02 11:52:22,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 11:52:22,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 11:52:22,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:52:22,826 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-10-02 11:52:23,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:23,683 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-10-02 11:52:23,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-02 11:52:23,683 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-10-02 11:52:23,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:23,685 INFO L225 Difference]: With dead ends: 157 [2018-10-02 11:52:23,685 INFO L226 Difference]: Without dead ends: 155 [2018-10-02 11:52:23,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2303, Invalid=3859, Unknown=0, NotChecked=0, Total=6162 [2018-10-02 11:52:23,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-02 11:52:23,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2018-10-02 11:52:23,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-02 11:52:23,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-10-02 11:52:23,723 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2018-10-02 11:52:23,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:23,723 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-10-02 11:52:23,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 11:52:23,723 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-10-02 11:52:23,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-02 11:52:23,724 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:23,724 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-10-02 11:52:23,725 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:23,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:23,725 INFO L82 PathProgramCache]: Analyzing trace with hash 2109708315, now seen corresponding path program 71 times [2018-10-02 11:52:23,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:23,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:23,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:23,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:23,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:25,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:25,619 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:25,626 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:52:25,757 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-02 11:52:25,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:25,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:29,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:29,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 149 [2018-10-02 11:52:29,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-10-02 11:52:29,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-10-02 11:52:29,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4367, Invalid=17983, Unknown=0, NotChecked=0, Total=22350 [2018-10-02 11:52:29,807 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 150 states. [2018-10-02 11:52:33,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:33,872 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2018-10-02 11:52:33,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-02 11:52:33,873 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 150 [2018-10-02 11:52:33,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:33,873 INFO L225 Difference]: With dead ends: 230 [2018-10-02 11:52:33,874 INFO L226 Difference]: Without dead ends: 153 [2018-10-02 11:52:33,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12619 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=6587, Invalid=28195, Unknown=0, NotChecked=0, Total=34782 [2018-10-02 11:52:33,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-02 11:52:33,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-02 11:52:33,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-02 11:52:33,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-10-02 11:52:33,914 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2018-10-02 11:52:33,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:33,914 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-10-02 11:52:33,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-10-02 11:52:33,914 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-10-02 11:52:33,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-02 11:52:33,915 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:33,915 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-10-02 11:52:33,915 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:33,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:33,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1562266795, now seen corresponding path program 72 times [2018-10-02 11:52:33,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:33,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:33,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:33,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:33,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:34,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:34,737 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:34,744 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:52:34,874 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-02 11:52:34,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:34,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:34,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:34,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2018-10-02 11:52:34,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-02 11:52:34,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-02 11:52:34,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:52:34,962 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 43 states. [2018-10-02 11:52:35,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:35,861 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2018-10-02 11:52:35,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-02 11:52:35,862 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 152 [2018-10-02 11:52:35,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:35,863 INFO L225 Difference]: With dead ends: 161 [2018-10-02 11:52:35,863 INFO L226 Difference]: Without dead ends: 159 [2018-10-02 11:52:35,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2422, Invalid=4058, Unknown=0, NotChecked=0, Total=6480 [2018-10-02 11:52:35,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-02 11:52:35,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-10-02 11:52:35,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-02 11:52:35,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-10-02 11:52:35,893 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-10-02 11:52:35,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:35,893 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-10-02 11:52:35,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-02 11:52:35,893 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-10-02 11:52:35,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-02 11:52:35,894 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:35,894 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-10-02 11:52:35,894 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:35,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:35,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1900215951, now seen corresponding path program 73 times [2018-10-02 11:52:35,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:35,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:35,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:35,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:35,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:38,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:38,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:38,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:38,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:42,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:42,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 153 [2018-10-02 11:52:42,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-10-02 11:52:42,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-10-02 11:52:42,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4599, Invalid=18963, Unknown=0, NotChecked=0, Total=23562 [2018-10-02 11:52:42,461 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 154 states. [2018-10-02 11:52:47,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:47,230 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2018-10-02 11:52:47,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-02 11:52:47,230 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 154 [2018-10-02 11:52:47,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:47,230 INFO L225 Difference]: With dead ends: 236 [2018-10-02 11:52:47,231 INFO L226 Difference]: Without dead ends: 157 [2018-10-02 11:52:47,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13321 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=6936, Invalid=29736, Unknown=0, NotChecked=0, Total=36672 [2018-10-02 11:52:47,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-02 11:52:47,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-02 11:52:47,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-02 11:52:47,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-10-02 11:52:47,264 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-10-02 11:52:47,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:47,265 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-10-02 11:52:47,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-10-02 11:52:47,265 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-10-02 11:52:47,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-02 11:52:47,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:47,265 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-10-02 11:52:47,266 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:47,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:47,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1257182007, now seen corresponding path program 74 times [2018-10-02 11:52:47,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:47,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:47,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:47,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:47,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:48,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:48,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:48,029 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:52:48,124 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:52:48,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:48,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:48,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:48,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-10-02 11:52:48,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 11:52:48,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 11:52:48,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:52:48,219 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-10-02 11:52:49,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:49,113 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2018-10-02 11:52:49,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-02 11:52:49,114 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-10-02 11:52:49,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:49,115 INFO L225 Difference]: With dead ends: 165 [2018-10-02 11:52:49,115 INFO L226 Difference]: Without dead ends: 163 [2018-10-02 11:52:49,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2544, Invalid=4262, Unknown=0, NotChecked=0, Total=6806 [2018-10-02 11:52:49,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-02 11:52:49,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-10-02 11:52:49,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-02 11:52:49,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-10-02 11:52:49,150 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2018-10-02 11:52:49,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:49,151 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-10-02 11:52:49,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 11:52:49,151 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-10-02 11:52:49,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-02 11:52:49,151 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:49,151 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2018-10-02 11:52:49,152 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:49,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:49,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1266046205, now seen corresponding path program 75 times [2018-10-02 11:52:49,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:49,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:49,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:49,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:49,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:51,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:51,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:51,165 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:52:51,304 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-02 11:52:51,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:51,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:55,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:55,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 157 [2018-10-02 11:52:55,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-10-02 11:52:55,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-10-02 11:52:55,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4837, Invalid=19969, Unknown=0, NotChecked=0, Total=24806 [2018-10-02 11:52:55,674 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 158 states. [2018-10-02 11:52:59,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:59,748 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2018-10-02 11:52:59,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-02 11:52:59,749 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 158 [2018-10-02 11:52:59,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:59,749 INFO L225 Difference]: With dead ends: 242 [2018-10-02 11:52:59,750 INFO L226 Difference]: Without dead ends: 161 [2018-10-02 11:52:59,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14042 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=7294, Invalid=31318, Unknown=0, NotChecked=0, Total=38612 [2018-10-02 11:52:59,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-02 11:52:59,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-02 11:52:59,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-02 11:52:59,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-10-02 11:52:59,785 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2018-10-02 11:52:59,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:59,785 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-10-02 11:52:59,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-10-02 11:52:59,785 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-10-02 11:52:59,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-02 11:52:59,786 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:59,786 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-10-02 11:52:59,786 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:59,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:59,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1726082109, now seen corresponding path program 76 times [2018-10-02 11:52:59,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:59,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:59,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:59,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:59,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:00,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:00,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:00,581 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:00,677 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:00,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:00,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:00,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:00,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-10-02 11:53:00,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-02 11:53:00,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-02 11:53:00,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:53:00,800 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 45 states. [2018-10-02 11:53:01,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:01,739 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-10-02 11:53:01,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-02 11:53:01,739 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 160 [2018-10-02 11:53:01,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:01,740 INFO L225 Difference]: With dead ends: 169 [2018-10-02 11:53:01,740 INFO L226 Difference]: Without dead ends: 167 [2018-10-02 11:53:01,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2669, Invalid=4471, Unknown=0, NotChecked=0, Total=7140 [2018-10-02 11:53:01,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-02 11:53:01,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2018-10-02 11:53:01,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-02 11:53:01,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-10-02 11:53:01,779 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-10-02 11:53:01,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:01,779 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-10-02 11:53:01,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-02 11:53:01,779 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-10-02 11:53:01,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-02 11:53:01,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:01,780 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-10-02 11:53:01,781 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:01,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:01,781 INFO L82 PathProgramCache]: Analyzing trace with hash 907582839, now seen corresponding path program 77 times [2018-10-02 11:53:01,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:01,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:01,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:01,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:01,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:04,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:04,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:04,265 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:04,272 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:04,417 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-02 11:53:04,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:04,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:08,939 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:08,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 161 [2018-10-02 11:53:08,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-10-02 11:53:08,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-10-02 11:53:08,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5081, Invalid=21001, Unknown=0, NotChecked=0, Total=26082 [2018-10-02 11:53:08,942 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 162 states. [2018-10-02 11:53:11,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:11,129 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2018-10-02 11:53:11,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-02 11:53:11,129 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 162 [2018-10-02 11:53:11,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:11,130 INFO L225 Difference]: With dead ends: 248 [2018-10-02 11:53:11,130 INFO L226 Difference]: Without dead ends: 165 [2018-10-02 11:53:11,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14782 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=7661, Invalid=32941, Unknown=0, NotChecked=0, Total=40602 [2018-10-02 11:53:11,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-02 11:53:11,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-02 11:53:11,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-02 11:53:11,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-10-02 11:53:11,200 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-10-02 11:53:11,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:11,200 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-10-02 11:53:11,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-10-02 11:53:11,200 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-10-02 11:53:11,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-02 11:53:11,201 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:11,201 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-10-02 11:53:11,202 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:11,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:11,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1818644047, now seen corresponding path program 78 times [2018-10-02 11:53:11,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:11,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:11,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:11,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:11,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:12,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:12,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:12,009 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:12,158 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-10-02 11:53:12,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:12,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:12,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:12,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-10-02 11:53:12,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 11:53:12,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 11:53:12,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:53:12,330 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2018-10-02 11:53:13,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:13,340 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2018-10-02 11:53:13,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-02 11:53:13,341 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2018-10-02 11:53:13,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:13,341 INFO L225 Difference]: With dead ends: 173 [2018-10-02 11:53:13,342 INFO L226 Difference]: Without dead ends: 171 [2018-10-02 11:53:13,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2797, Invalid=4685, Unknown=0, NotChecked=0, Total=7482 [2018-10-02 11:53:13,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-02 11:53:13,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2018-10-02 11:53:13,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-02 11:53:13,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-10-02 11:53:13,380 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 164 [2018-10-02 11:53:13,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:13,381 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-10-02 11:53:13,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 11:53:13,381 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-10-02 11:53:13,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-02 11:53:13,381 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:13,381 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1] [2018-10-02 11:53:13,382 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:13,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:13,382 INFO L82 PathProgramCache]: Analyzing trace with hash 334812651, now seen corresponding path program 79 times [2018-10-02 11:53:13,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:13,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:13,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:13,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:13,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:15,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:15,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:15,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:15,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:15,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-02 11:53:19,950 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-02 11:53:20,151 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:20,151 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 11:53:20,157 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 11:53:20,157 INFO L202 PluginConnector]: Adding new model seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 11:53:20 BoogieIcfgContainer [2018-10-02 11:53:20,157 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 11:53:20,158 INFO L168 Benchmark]: Toolchain (without parser) took 240242.57 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 162.0 MB). Free memory was 1.5 GB in the beginning and 983.9 MB in the end (delta: 488.0 MB). Peak memory consumption was 650.0 MB. Max. memory is 7.1 GB. [2018-10-02 11:53:20,159 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:53:20,159 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.65 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:53:20,160 INFO L168 Benchmark]: Boogie Preprocessor took 21.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:53:20,160 INFO L168 Benchmark]: RCFGBuilder took 376.69 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-02 11:53:20,160 INFO L168 Benchmark]: TraceAbstraction took 239796.97 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 162.0 MB). Free memory was 1.5 GB in the beginning and 983.9 MB in the end (delta: 466.9 MB). Peak memory consumption was 628.9 MB. Max. memory is 7.1 GB. [2018-10-02 11:53:20,163 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.65 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 376.69 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 239796.97 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 162.0 MB). Free memory was 1.5 GB in the beginning and 983.9 MB in the end (delta: 466.9 MB). Peak memory consumption was 628.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 80). Cancelled while BasicCegarLoop was analyzing trace of length 167 with TraceHistMax 41, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 160 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 239.7s OverallTime, 81 OverallIterations, 41 TraceHistogramMax, 89.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1182 SDtfs, 905 SDslu, 6388 SDs, 0 SdLazy, 63860 SolverSat, 3987 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 38.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11827 GetRequests, 5891 SyntacticMatches, 0 SemanticMatches, 5936 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226475 ImplicationChecksByTransitivity, 164.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=167occurred 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: 1.3s AutomataMinimizationTime, 80 MinimizatonAttempts, 160 StatesRemovedByMinimization, 40 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.9s SsaConstructionTime, 5.3s SatisfiabilityAnalysisTime, 132.0s InterpolantComputationTime, 13586 NumberOfCodeBlocks, 13586 NumberOfCodeBlocksAsserted, 1003 NumberOfCheckSat, 13428 ConstructedInterpolants, 0 QuantifiedInterpolants, 7396594 SizeOfPredicates, 312 NumberOfNonLiveVariables, 27456 ConjunctsInSsa, 3666 ConjunctsInUnsatCore, 158 InterpolantComputations, 2 PerfectInterpolantSequences, 88558/173838 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/seq.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_11-53-20-178.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/seq.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_11-53-20-178.csv Completed graceful shutdown