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/down.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-bd42740 [2018-09-23 21:25:44,744 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 21:25:44,746 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 21:25:44,759 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 21:25:44,759 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 21:25:44,760 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 21:25:44,761 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 21:25:44,763 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 21:25:44,765 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 21:25:44,766 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 21:25:44,767 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-23 21:25:44,792 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 [2018-09-23 21:25:44,810 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 21:25:44,810 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 21:25:44,811 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 21:25:44,811 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 21:25:44,812 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 21:25:44,812 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 21:25:44,812 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 21:25:44,812 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 21:25:44,813 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 21:25:44,813 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 21:25:44,813 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 21:25:44,813 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 21:25:44,813 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 21:25:44,814 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 21:25:44,814 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 21:25:44,814 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 21:25:44,814 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 21:25:44,814 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 21:25:44,814 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 21:25:44,815 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 21:25:44,815 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 21:25:44,815 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 21:25:44,815 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:25:44,815 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 21:25:44,816 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 21:25:44,816 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 21:25:44,816 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 21:25:44,816 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 21:25:44,816 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 21:25:44,817 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 21:25:44,861 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 21:25:44,873 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 21:25:44,877 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 21:25:44,878 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 21:25:44,878 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 21:25:44,879 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/down.i_4.bpl [2018-09-23 21:25:44,879 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/down.i_4.bpl' [2018-09-23 21:25:44,936 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 21:25:44,939 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 21:25:44,940 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 21:25:44,940 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 21:25:44,940 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 21:25:44,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:25:44" (1/1) ... [2018-09-23 21:25:44,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:25:44" (1/1) ... [2018-09-23 21:25:44,981 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 21:25:44,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 21:25:44,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 21:25:44,982 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 21:25:44,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:25:44" (1/1) ... [2018-09-23 21:25:44,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:25:44" (1/1) ... [2018-09-23 21:25:44,995 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:25:44" (1/1) ... [2018-09-23 21:25:44,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:25:44" (1/1) ... [2018-09-23 21:25:44,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:25:44" (1/1) ... [2018-09-23 21:25:45,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:25:44" (1/1) ... [2018-09-23 21:25:45,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:25:44" (1/1) ... [2018-09-23 21:25:45,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 21:25:45,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 21:25:45,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 21:25:45,003 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 21:25:45,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:25:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:25:45,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 21:25:45,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 21:25:45,332 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 21:25:45,333 INFO L202 PluginConnector]: Adding new model down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:25:45 BoogieIcfgContainer [2018-09-23 21:25:45,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 21:25:45,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 21:25:45,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 21:25:45,338 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 21:25:45,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:25:44" (1/2) ... [2018-09-23 21:25:45,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f1326f2 and model type down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 09:25:45, skipping insertion in model container [2018-09-23 21:25:45,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:25:45" (2/2) ... [2018-09-23 21:25:45,342 INFO L112 eAbstractionObserver]: Analyzing ICFG down.i_4.bpl [2018-09-23 21:25:45,352 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 21:25:45,365 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 21:25:45,426 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 21:25:45,427 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 21:25:45,427 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 21:25:45,428 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 21:25:45,428 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 21:25:45,428 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 21:25:45,428 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 21:25:45,430 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 21:25:45,430 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 21:25:45,448 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-23 21:25:45,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 21:25:45,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:45,468 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-23 21:25:45,469 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:45,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:45,477 INFO L82 PathProgramCache]: Analyzing trace with hash 889539593, now seen corresponding path program 1 times [2018-09-23 21:25:45,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:45,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:45,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:45,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:45,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:45,752 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:25:45,752 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-23 21:25:45,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 21:25:45,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 21:25:45,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:25:45,778 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-09-23 21:25:45,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:45,917 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2018-09-23 21:25:45,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 21:25:45,920 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-23 21:25:45,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:45,931 INFO L225 Difference]: With dead ends: 16 [2018-09-23 21:25:45,931 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 21:25:45,936 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 [2018-09-23 21:25:45,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 21:25:45,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 21:25:45,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 21:25:45,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-23 21:25:45,970 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-09-23 21:25:45,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:45,970 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-23 21:25:45,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 21:25:45,970 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-23 21:25:45,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 21:25:45,971 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:45,971 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-23 21:25:45,971 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:45,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:45,972 INFO L82 PathProgramCache]: Analyzing trace with hash 198622019, now seen corresponding path program 1 times [2018-09-23 21:25:45,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:45,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:45,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:45,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:45,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:45,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:46,046 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:25:46,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-23 21:25:46,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 21:25:46,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 21:25:46,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:25:46,049 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-09-23 21:25:46,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:46,154 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-23 21:25:46,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:25:46,155 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-23 21:25:46,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:46,156 INFO L225 Difference]: With dead ends: 17 [2018-09-23 21:25:46,156 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 21:25:46,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:25:46,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 21:25:46,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2018-09-23 21:25:46,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 21:25:46,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-23 21:25:46,161 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-09-23 21:25:46,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:46,162 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-23 21:25:46,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 21:25:46,162 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-23 21:25:46,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 21:25:46,163 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:46,163 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 21:25:46,163 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:46,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:46,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1897132479, now seen corresponding path program 1 times [2018-09-23 21:25:46,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:46,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:46,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:46,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:46,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:46,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:46,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:46,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:46,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:46,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:46,375 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:46,375 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 21:25:46,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 21:25:46,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 21:25:46,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:25:46,377 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2018-09-23 21:25:46,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:46,742 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-09-23 21:25:46,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:25:46,742 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-23 21:25:46,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:46,743 INFO L225 Difference]: With dead ends: 20 [2018-09-23 21:25:46,743 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 21:25:46,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:25:46,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 21:25:46,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 21:25:46,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 21:25:46,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-09-23 21:25:46,749 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-09-23 21:25:46,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:46,749 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-09-23 21:25:46,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 21:25:46,750 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-09-23 21:25:46,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 21:25:46,750 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:46,751 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-09-23 21:25:46,751 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:46,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:46,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1765329927, now seen corresponding path program 2 times [2018-09-23 21:25:46,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:46,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:46,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:46,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:46,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:47,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:47,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:47,024 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:25:47,056 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:25:47,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:47,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:47,140 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:47,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-09-23 21:25:47,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 21:25:47,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 21:25:47,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:25:47,142 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-09-23 21:25:47,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:47,375 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-23 21:25:47,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:25:47,376 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-09-23 21:25:47,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:47,377 INFO L225 Difference]: With dead ends: 21 [2018-09-23 21:25:47,379 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 21:25:47,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:25:47,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 21:25:47,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-09-23 21:25:47,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 21:25:47,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-23 21:25:47,385 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-09-23 21:25:47,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:47,385 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-23 21:25:47,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 21:25:47,386 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-23 21:25:47,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 21:25:47,386 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:47,386 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-09-23 21:25:47,387 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:47,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:47,387 INFO L82 PathProgramCache]: Analyzing trace with hash 29955317, now seen corresponding path program 3 times [2018-09-23 21:25:47,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:47,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:47,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:47,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:47,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:47,489 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:47,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:47,506 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:25:47,538 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 21:25:47,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:47,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:47,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:47,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 21:25:47,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 21:25:47,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 21:25:47,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:25:47,583 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-09-23 21:25:47,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:47,914 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-09-23 21:25:47,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 21:25:47,919 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-23 21:25:47,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:47,920 INFO L225 Difference]: With dead ends: 26 [2018-09-23 21:25:47,920 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 21:25:47,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:25:47,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 21:25:47,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-23 21:25:47,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-23 21:25:47,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-09-23 21:25:47,931 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2018-09-23 21:25:47,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:47,933 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-09-23 21:25:47,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 21:25:47,934 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-09-23 21:25:47,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 21:25:47,934 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:47,935 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2018-09-23 21:25:47,935 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:47,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:47,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1153652177, now seen corresponding path program 4 times [2018-09-23 21:25:47,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:47,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:47,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:47,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:47,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:48,194 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:48,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:48,203 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:25:48,216 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:25:48,217 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:48,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:48,258 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:48,279 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:48,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-09-23 21:25:48,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 21:25:48,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 21:25:48,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:25:48,282 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-09-23 21:25:48,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:48,425 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-23 21:25:48,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 21:25:48,426 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-23 21:25:48,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:48,427 INFO L225 Difference]: With dead ends: 25 [2018-09-23 21:25:48,428 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 21:25:48,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:25:48,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 21:25:48,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-09-23 21:25:48,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 21:25:48,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-23 21:25:48,434 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-09-23 21:25:48,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:48,435 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-23 21:25:48,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 21:25:48,435 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-23 21:25:48,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:25:48,436 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:48,436 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-09-23 21:25:48,436 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:48,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:48,437 INFO L82 PathProgramCache]: Analyzing trace with hash -558246485, now seen corresponding path program 5 times [2018-09-23 21:25:48,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:48,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:48,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:48,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:48,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:48,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:48,586 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:48,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:48,587 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:48,595 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:25:48,615 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-23 21:25:48,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:48,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:48,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:48,661 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 21:25:48,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:25:48,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:25:48,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:25:48,662 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-09-23 21:25:48,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:48,805 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-09-23 21:25:48,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 21:25:48,805 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-23 21:25:48,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:48,806 INFO L225 Difference]: With dead ends: 32 [2018-09-23 21:25:48,807 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 21:25:48,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:25:48,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 21:25:48,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 21:25:48,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 21:25:48,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-23 21:25:48,812 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-09-23 21:25:48,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:48,813 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-23 21:25:48,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:25:48,813 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-23 21:25:48,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 21:25:48,814 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:48,814 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-09-23 21:25:48,814 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:48,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:48,815 INFO L82 PathProgramCache]: Analyzing trace with hash -578011675, now seen corresponding path program 6 times [2018-09-23 21:25:48,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:48,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:48,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:48,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:48,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:48,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:48,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:49,001 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:25:49,048 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-23 21:25:49,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:49,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:49,209 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:49,238 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:49,238 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-09-23 21:25:49,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:25:49,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:25:49,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:25:49,240 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-09-23 21:25:49,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:49,432 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-23 21:25:49,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 21:25:49,432 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-09-23 21:25:49,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:49,434 INFO L225 Difference]: With dead ends: 29 [2018-09-23 21:25:49,434 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 21:25:49,435 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 [2018-09-23 21:25:49,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 21:25:49,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2018-09-23 21:25:49,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 21:25:49,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-09-23 21:25:49,441 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-09-23 21:25:49,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:49,441 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-09-23 21:25:49,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:25:49,441 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-09-23 21:25:49,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 21:25:49,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:49,442 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-09-23 21:25:49,443 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:49,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:49,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1418505247, now seen corresponding path program 7 times [2018-09-23 21:25:49,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:49,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:49,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:49,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:49,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:49,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:49,570 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:49,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:49,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:49,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:49,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 21:25:49,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:25:49,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:25:49,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:25:49,637 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-09-23 21:25:49,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:49,786 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-09-23 21:25:49,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 21:25:49,787 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-23 21:25:49,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:49,787 INFO L225 Difference]: With dead ends: 38 [2018-09-23 21:25:49,787 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 21:25:49,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:25:49,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 21:25:49,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 21:25:49,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 21:25:49,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-09-23 21:25:49,794 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-09-23 21:25:49,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:49,795 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-09-23 21:25:49,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:25:49,796 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-09-23 21:25:49,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 21:25:49,796 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:49,796 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-09-23 21:25:49,797 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:49,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:49,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1375531237, now seen corresponding path program 8 times [2018-09-23 21:25:49,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:49,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:49,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:49,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:49,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:49,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:49,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:49,949 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:25:49,998 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:25:49,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:50,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:50,110 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:50,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-09-23 21:25:50,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 21:25:50,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 21:25:50,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:25:50,112 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2018-09-23 21:25:50,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:50,389 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-23 21:25:50,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 21:25:50,389 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2018-09-23 21:25:50,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:50,390 INFO L225 Difference]: With dead ends: 33 [2018-09-23 21:25:50,390 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 21:25:50,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:25:50,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 21:25:50,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-09-23 21:25:50,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 21:25:50,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-23 21:25:50,398 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-09-23 21:25:50,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:50,398 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-23 21:25:50,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 21:25:50,398 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-23 21:25:50,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 21:25:50,399 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:50,399 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-09-23 21:25:50,400 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:50,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:50,400 INFO L82 PathProgramCache]: Analyzing trace with hash 964341655, now seen corresponding path program 9 times [2018-09-23 21:25:50,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:50,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:50,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:50,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:50,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:50,741 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:50,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:50,742 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:50,751 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:25:50,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 21:25:50,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:50,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:50,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:50,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 21:25:50,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:25:50,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:25:50,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:25:50,846 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-09-23 21:25:51,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:51,108 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-09-23 21:25:51,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 21:25:51,108 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-23 21:25:51,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:51,109 INFO L225 Difference]: With dead ends: 44 [2018-09-23 21:25:51,109 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 21:25:51,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:25:51,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 21:25:51,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 21:25:51,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 21:25:51,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-09-23 21:25:51,116 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-09-23 21:25:51,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:51,117 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-09-23 21:25:51,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:25:51,117 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-09-23 21:25:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 21:25:51,118 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:51,118 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-09-23 21:25:51,118 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:51,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:51,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1427751471, now seen corresponding path program 10 times [2018-09-23 21:25:51,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:51,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:51,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:51,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:51,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:51,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:51,476 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:51,476 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:51,484 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:25:51,502 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:25:51,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:51,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:51,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:51,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-09-23 21:25:51,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:25:51,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:25:51,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:25:51,578 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-09-23 21:25:51,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:51,798 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-23 21:25:51,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 21:25:51,798 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-09-23 21:25:51,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:51,800 INFO L225 Difference]: With dead ends: 37 [2018-09-23 21:25:51,800 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 21:25:51,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:25:51,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 21:25:51,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-09-23 21:25:51,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 21:25:51,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-09-23 21:25:51,807 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-09-23 21:25:51,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:51,808 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-09-23 21:25:51,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:25:51,808 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-09-23 21:25:51,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 21:25:51,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:51,809 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-09-23 21:25:51,809 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:51,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:51,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1974662963, now seen corresponding path program 11 times [2018-09-23 21:25:51,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:51,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:51,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:51,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:51,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:52,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:52,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:52,075 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:25:52,128 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 21:25:52,129 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:52,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:52,176 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:52,177 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 21:25:52,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:25:52,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:25:52,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:25:52,178 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2018-09-23 21:25:52,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:52,888 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-09-23 21:25:52,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 21:25:52,888 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-23 21:25:52,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:52,889 INFO L225 Difference]: With dead ends: 50 [2018-09-23 21:25:52,889 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 21:25:52,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:25:52,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 21:25:52,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 21:25:52,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 21:25:52,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-09-23 21:25:52,896 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-09-23 21:25:52,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:52,896 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-09-23 21:25:52,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:25:52,896 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-09-23 21:25:52,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 21:25:52,897 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:52,897 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-09-23 21:25:52,898 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:52,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:52,898 INFO L82 PathProgramCache]: Analyzing trace with hash 577956359, now seen corresponding path program 12 times [2018-09-23 21:25:52,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:52,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:52,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:52,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:52,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:53,122 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:53,122 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:53,130 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:25:53,254 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 21:25:53,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:53,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:53,375 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:53,375 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-09-23 21:25:53,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:25:53,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:25:53,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:25:53,376 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2018-09-23 21:25:53,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:53,525 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-23 21:25:53,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 21:25:53,526 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2018-09-23 21:25:53,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:53,527 INFO L225 Difference]: With dead ends: 41 [2018-09-23 21:25:53,527 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 21:25:53,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:25:53,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 21:25:53,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-09-23 21:25:53,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 21:25:53,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-23 21:25:53,535 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-09-23 21:25:53,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:53,535 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-23 21:25:53,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:25:53,535 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-23 21:25:53,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 21:25:53,535 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:53,536 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-09-23 21:25:53,536 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:53,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:53,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1365213059, now seen corresponding path program 13 times [2018-09-23 21:25:53,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:53,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:53,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:53,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:53,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:53,736 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:53,736 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:53,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:53,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:53,783 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:53,804 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:53,805 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 21:25:53,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:25:53,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:25:53,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:25:53,806 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2018-09-23 21:25:54,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:54,540 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-09-23 21:25:54,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 21:25:54,540 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-23 21:25:54,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:54,541 INFO L225 Difference]: With dead ends: 56 [2018-09-23 21:25:54,541 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 21:25:54,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:25:54,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 21:25:54,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 21:25:54,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 21:25:54,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-09-23 21:25:54,547 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-09-23 21:25:54,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:54,548 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-09-23 21:25:54,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:25:54,548 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-09-23 21:25:54,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 21:25:54,549 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:54,549 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-09-23 21:25:54,549 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:54,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:54,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1260506179, now seen corresponding path program 14 times [2018-09-23 21:25:54,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:54,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:54,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:54,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:54,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:55,685 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:55,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:55,695 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:25:55,729 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:25:55,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:55,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:55,817 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:55,817 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-09-23 21:25:55,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:25:55,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:25:55,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:25:55,818 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-09-23 21:25:56,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:56,024 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-23 21:25:56,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 21:25:56,025 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-09-23 21:25:56,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:56,025 INFO L225 Difference]: With dead ends: 45 [2018-09-23 21:25:56,026 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 21:25:56,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=189, Invalid=317, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:25:56,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 21:25:56,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-09-23 21:25:56,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 21:25:56,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-09-23 21:25:56,035 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-09-23 21:25:56,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:56,036 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-09-23 21:25:56,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:25:56,036 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-09-23 21:25:56,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 21:25:56,036 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:56,036 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-09-23 21:25:56,037 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:56,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:56,037 INFO L82 PathProgramCache]: Analyzing trace with hash -165727303, now seen corresponding path program 15 times [2018-09-23 21:25:56,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:56,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:56,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:56,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:56,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:56,517 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:56,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:56,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:56,529 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:25:56,563 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 21:25:56,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:56,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:56,575 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:56,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:56,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 21:25:56,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:25:56,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:25:56,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:25:56,602 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2018-09-23 21:25:56,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:56,929 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-09-23 21:25:56,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 21:25:56,930 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-23 21:25:56,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:56,930 INFO L225 Difference]: With dead ends: 62 [2018-09-23 21:25:56,930 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 21:25:56,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:25:56,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 21:25:56,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 21:25:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 21:25:56,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-09-23 21:25:56,938 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2018-09-23 21:25:56,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:56,939 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-09-23 21:25:56,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:25:56,939 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-09-23 21:25:56,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 21:25:56,940 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:56,940 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-09-23 21:25:56,940 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:56,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:56,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1448426227, now seen corresponding path program 16 times [2018-09-23 21:25:56,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:56,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:56,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:56,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:56,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:57,094 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:57,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:57,101 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:25:57,124 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:25:57,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:57,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:57,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:57,195 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-09-23 21:25:57,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:25:57,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:25:57,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:25:57,196 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-09-23 21:25:57,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:57,360 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-23 21:25:57,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:25:57,361 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-09-23 21:25:57,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:57,361 INFO L225 Difference]: With dead ends: 49 [2018-09-23 21:25:57,362 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 21:25:57,362 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 [2018-09-23 21:25:57,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 21:25:57,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-09-23 21:25:57,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 21:25:57,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-23 21:25:57,370 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-09-23 21:25:57,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:57,371 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-23 21:25:57,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:25:57,371 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-23 21:25:57,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 21:25:57,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:57,372 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-09-23 21:25:57,372 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:57,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:57,373 INFO L82 PathProgramCache]: Analyzing trace with hash 368133487, now seen corresponding path program 17 times [2018-09-23 21:25:57,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:57,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:57,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:57,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:57,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:57,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:57,815 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:57,815 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:57,823 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:25:57,850 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-23 21:25:57,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:57,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:57,882 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:57,883 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 21:25:57,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 21:25:57,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 21:25:57,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:25:57,884 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2018-09-23 21:25:58,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:58,931 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-09-23 21:25:58,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 21:25:58,932 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-23 21:25:58,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:58,932 INFO L225 Difference]: With dead ends: 68 [2018-09-23 21:25:58,932 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 21:25:58,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=261, Invalid=731, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:25:58,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 21:25:58,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 21:25:58,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 21:25:58,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-09-23 21:25:58,942 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-09-23 21:25:58,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:58,942 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-09-23 21:25:58,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 21:25:58,942 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-09-23 21:25:58,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 21:25:58,943 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:58,943 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-09-23 21:25:58,943 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:58,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:58,944 INFO L82 PathProgramCache]: Analyzing trace with hash -788717655, now seen corresponding path program 18 times [2018-09-23 21:25:58,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:58,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:58,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:58,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:58,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:59,188 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:59,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:59,203 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:25:59,236 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-09-23 21:25:59,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:59,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:59,281 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:59,302 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:59,303 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-09-23 21:25:59,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:25:59,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:25:59,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:25:59,305 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-09-23 21:25:59,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:59,551 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-23 21:25:59,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 21:25:59,551 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-09-23 21:25:59,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:59,552 INFO L225 Difference]: With dead ends: 53 [2018-09-23 21:25:59,552 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 21:25:59,553 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 [2018-09-23 21:25:59,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 21:25:59,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2018-09-23 21:25:59,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 21:25:59,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-09-23 21:25:59,562 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2018-09-23 21:25:59,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:59,562 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-09-23 21:25:59,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:25:59,563 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-09-23 21:25:59,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 21:25:59,563 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:59,563 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-09-23 21:25:59,564 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:59,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:59,564 INFO L82 PathProgramCache]: Analyzing trace with hash -2043489115, now seen corresponding path program 19 times [2018-09-23 21:25:59,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:59,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:59,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:59,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:59,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:59,884 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:59,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:59,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:59,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:59,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:59,970 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:59,971 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 21:25:59,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 21:25:59,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 21:25:59,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:25:59,972 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2018-09-23 21:26:00,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:00,369 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-09-23 21:26:00,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 21:26:00,369 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-23 21:26:00,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:00,370 INFO L225 Difference]: With dead ends: 74 [2018-09-23 21:26:00,370 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 21:26:00,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:26:00,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 21:26:00,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 21:26:00,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 21:26:00,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-09-23 21:26:00,376 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2018-09-23 21:26:00,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:00,376 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-09-23 21:26:00,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 21:26:00,377 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-09-23 21:26:00,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 21:26:00,377 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:00,377 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-09-23 21:26:00,378 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:00,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:00,378 INFO L82 PathProgramCache]: Analyzing trace with hash -957152801, now seen corresponding path program 20 times [2018-09-23 21:26:00,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:00,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:00,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:00,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:00,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:01,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:01,262 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:01,270 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:26:01,298 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:26:01,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:01,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:01,344 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:01,365 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:01,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-09-23 21:26:01,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 21:26:01,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 21:26:01,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:26:01,366 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 17 states. [2018-09-23 21:26:01,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:01,685 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-23 21:26:01,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 21:26:01,688 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2018-09-23 21:26:01,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:01,688 INFO L225 Difference]: With dead ends: 57 [2018-09-23 21:26:01,688 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 21:26:01,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=303, Invalid=509, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:26:01,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 21:26:01,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2018-09-23 21:26:01,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 21:26:01,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-23 21:26:01,697 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-09-23 21:26:01,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:01,698 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-23 21:26:01,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 21:26:01,698 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-23 21:26:01,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 21:26:01,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:01,699 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-09-23 21:26:01,699 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:01,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:01,699 INFO L82 PathProgramCache]: Analyzing trace with hash -700907173, now seen corresponding path program 21 times [2018-09-23 21:26:01,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:01,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:01,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:01,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:01,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:02,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:02,008 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:02,016 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:26:02,051 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-23 21:26:02,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:02,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:02,089 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:02,090 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 21:26:02,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 21:26:02,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 21:26:02,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:26:02,091 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2018-09-23 21:26:02,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:02,571 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-09-23 21:26:02,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 21:26:02,572 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-23 21:26:02,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:02,572 INFO L225 Difference]: With dead ends: 80 [2018-09-23 21:26:02,572 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 21:26:02,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:26:02,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 21:26:02,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 21:26:02,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 21:26:02,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-09-23 21:26:02,580 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-09-23 21:26:02,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:02,580 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-09-23 21:26:02,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 21:26:02,581 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-09-23 21:26:02,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 21:26:02,581 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:02,581 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-09-23 21:26:02,582 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:02,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:02,582 INFO L82 PathProgramCache]: Analyzing trace with hash 877396373, now seen corresponding path program 22 times [2018-09-23 21:26:02,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:02,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:02,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:02,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:02,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:03,123 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:03,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:03,131 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:26:03,165 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:26:03,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:03,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:03,239 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:03,260 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:03,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-09-23 21:26:03,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:26:03,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:26:03,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:26:03,261 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-09-23 21:26:03,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:03,603 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-23 21:26:03,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 21:26:03,603 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-09-23 21:26:03,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:03,604 INFO L225 Difference]: With dead ends: 61 [2018-09-23 21:26:03,604 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 21:26:03,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=347, Invalid=583, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:26:03,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 21:26:03,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-09-23 21:26:03,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 21:26:03,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-09-23 21:26:03,616 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2018-09-23 21:26:03,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:03,621 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-09-23 21:26:03,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:26:03,621 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-09-23 21:26:03,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 21:26:03,622 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:03,622 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-09-23 21:26:03,622 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:03,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:03,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1364257681, now seen corresponding path program 23 times [2018-09-23 21:26:03,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:03,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:03,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:03,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:03,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:03,944 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:03,944 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:03,944 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:03,955 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:26:04,005 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-23 21:26:04,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:04,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:04,017 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:04,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:04,047 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 21:26:04,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 21:26:04,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 21:26:04,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:26:04,048 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2018-09-23 21:26:04,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:04,603 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-09-23 21:26:04,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 21:26:04,603 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-23 21:26:04,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:04,604 INFO L225 Difference]: With dead ends: 86 [2018-09-23 21:26:04,604 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 21:26:04,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=417, Invalid=1223, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:26:04,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 21:26:04,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-23 21:26:04,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 21:26:04,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-23 21:26:04,611 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-09-23 21:26:04,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:04,612 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-23 21:26:04,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 21:26:04,612 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-23 21:26:04,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 21:26:04,612 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:04,612 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-09-23 21:26:04,612 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:04,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:04,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1897217739, now seen corresponding path program 24 times [2018-09-23 21:26:04,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:04,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:04,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:04,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:04,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:05,119 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:05,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:05,127 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:26:05,167 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-23 21:26:05,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:05,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:05,226 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:05,226 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-09-23 21:26:05,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 21:26:05,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 21:26:05,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:26:05,227 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-09-23 21:26:05,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:05,637 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-23 21:26:05,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 21:26:05,638 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2018-09-23 21:26:05,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:05,639 INFO L225 Difference]: With dead ends: 65 [2018-09-23 21:26:05,639 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 21:26:05,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:26:05,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 21:26:05,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-09-23 21:26:05,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 21:26:05,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-23 21:26:05,648 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-09-23 21:26:05,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:05,648 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-23 21:26:05,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 21:26:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-23 21:26:05,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 21:26:05,649 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:05,649 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-09-23 21:26:05,649 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:05,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:05,650 INFO L82 PathProgramCache]: Analyzing trace with hash -2134920377, now seen corresponding path program 25 times [2018-09-23 21:26:05,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:05,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:05,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:05,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:05,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:06,014 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:06,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:06,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:06,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:06,094 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:06,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 21:26:06,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 21:26:06,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 21:26:06,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:26:06,095 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2018-09-23 21:26:06,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:06,819 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-09-23 21:26:06,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 21:26:06,819 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-23 21:26:06,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:06,820 INFO L225 Difference]: With dead ends: 92 [2018-09-23 21:26:06,820 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 21:26:06,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:26:06,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 21:26:06,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 21:26:06,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 21:26:06,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-09-23 21:26:06,827 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-09-23 21:26:06,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:06,827 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-09-23 21:26:06,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 21:26:06,827 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-09-23 21:26:06,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 21:26:06,828 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:06,828 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-09-23 21:26:06,828 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:06,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:06,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1286350463, now seen corresponding path program 26 times [2018-09-23 21:26:06,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:06,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:06,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:06,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:06,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:07,161 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:07,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:07,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:07,170 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:26:07,206 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:26:07,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:07,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:07,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:07,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-09-23 21:26:07,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:26:07,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:26:07,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:26:07,276 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-09-23 21:26:07,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:07,528 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-23 21:26:07,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 21:26:07,528 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-09-23 21:26:07,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:07,529 INFO L225 Difference]: With dead ends: 69 [2018-09-23 21:26:07,529 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 21:26:07,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:26:07,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 21:26:07,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-09-23 21:26:07,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 21:26:07,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-09-23 21:26:07,538 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-09-23 21:26:07,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:07,538 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-09-23 21:26:07,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:26:07,538 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-09-23 21:26:07,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 21:26:07,539 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:07,539 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-09-23 21:26:07,539 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:07,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:07,539 INFO L82 PathProgramCache]: Analyzing trace with hash 767719549, now seen corresponding path program 27 times [2018-09-23 21:26:07,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:07,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:07,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:07,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:07,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:07,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:08,210 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:08,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:08,218 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:26:08,258 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-23 21:26:08,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:08,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:08,291 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:08,291 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 21:26:08,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 21:26:08,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 21:26:08,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:26:08,292 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2018-09-23 21:26:08,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:08,824 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-09-23 21:26:08,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:26:08,824 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-23 21:26:08,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:08,825 INFO L225 Difference]: With dead ends: 98 [2018-09-23 21:26:08,825 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 21:26:08,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=541, Invalid=1621, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:26:08,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 21:26:08,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 21:26:08,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 21:26:08,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-09-23 21:26:08,836 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2018-09-23 21:26:08,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:08,836 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-09-23 21:26:08,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 21:26:08,836 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-09-23 21:26:08,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 21:26:08,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:08,837 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-09-23 21:26:08,837 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:08,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:08,837 INFO L82 PathProgramCache]: Analyzing trace with hash 285536695, now seen corresponding path program 28 times [2018-09-23 21:26:08,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:08,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:08,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:08,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:08,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:09,298 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:09,299 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:09,299 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:09,309 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:26:09,347 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:26:09,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:09,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:09,411 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:09,411 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-09-23 21:26:09,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 21:26:09,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 21:26:09,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:26:09,412 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 21 states. [2018-09-23 21:26:09,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:09,696 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-23 21:26:09,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 21:26:09,696 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2018-09-23 21:26:09,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:09,697 INFO L225 Difference]: With dead ends: 73 [2018-09-23 21:26:09,697 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 21:26:09,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=497, Invalid=835, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:26:09,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 21:26:09,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-09-23 21:26:09,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 21:26:09,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-23 21:26:09,708 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-09-23 21:26:09,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:09,709 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-23 21:26:09,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 21:26:09,709 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-23 21:26:09,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 21:26:09,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:09,709 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-09-23 21:26:09,709 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:09,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:09,710 INFO L82 PathProgramCache]: Analyzing trace with hash -477209805, now seen corresponding path program 29 times [2018-09-23 21:26:09,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:09,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:09,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:09,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:09,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:10,127 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:10,127 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:10,136 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:26:10,281 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-23 21:26:10,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:10,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:10,294 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:10,315 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:10,315 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 21:26:10,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 21:26:10,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 21:26:10,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:26:10,316 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2018-09-23 21:26:11,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:11,241 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-09-23 21:26:11,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 21:26:11,241 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-23 21:26:11,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:11,242 INFO L225 Difference]: With dead ends: 104 [2018-09-23 21:26:11,242 INFO L226 Difference]: Without dead ends: 69 [2018-09-23 21:26:11,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=609, Invalid=1841, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:26:11,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-23 21:26:11,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-23 21:26:11,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 21:26:11,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-09-23 21:26:11,253 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-09-23 21:26:11,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:11,254 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-09-23 21:26:11,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 21:26:11,254 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-09-23 21:26:11,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 21:26:11,254 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:11,255 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-09-23 21:26:11,255 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:11,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:11,255 INFO L82 PathProgramCache]: Analyzing trace with hash 35497837, now seen corresponding path program 30 times [2018-09-23 21:26:11,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:11,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:11,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:11,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:11,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:11,830 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:11,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:11,838 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:26:11,888 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-09-23 21:26:11,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:11,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:11,968 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:11,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-09-23 21:26:11,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 21:26:11,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 21:26:11,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:26:11,969 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-09-23 21:26:12,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:12,283 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-23 21:26:12,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 21:26:12,284 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-09-23 21:26:12,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:12,285 INFO L225 Difference]: With dead ends: 77 [2018-09-23 21:26:12,285 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 21:26:12,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=553, Invalid=929, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:26:12,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 21:26:12,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2018-09-23 21:26:12,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 21:26:12,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-09-23 21:26:12,297 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2018-09-23 21:26:12,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:12,297 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-09-23 21:26:12,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 21:26:12,298 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-09-23 21:26:12,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 21:26:12,298 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:12,298 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-09-23 21:26:12,298 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:12,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:12,299 INFO L82 PathProgramCache]: Analyzing trace with hash -246383767, now seen corresponding path program 31 times [2018-09-23 21:26:12,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:12,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:12,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:12,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:12,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:13,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:13,323 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:13,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:13,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:13,423 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:13,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 21:26:13,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 21:26:13,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 21:26:13,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:26:13,424 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2018-09-23 21:26:14,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:14,237 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-09-23 21:26:14,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 21:26:14,237 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-23 21:26:14,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:14,238 INFO L225 Difference]: With dead ends: 110 [2018-09-23 21:26:14,238 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 21:26:14,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=681, Invalid=2075, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:26:14,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 21:26:14,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-23 21:26:14,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 21:26:14,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-09-23 21:26:14,248 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2018-09-23 21:26:14,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:14,248 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-09-23 21:26:14,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 21:26:14,248 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-09-23 21:26:14,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 21:26:14,249 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:14,249 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-09-23 21:26:14,249 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:14,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:14,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1653283491, now seen corresponding path program 32 times [2018-09-23 21:26:14,249 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:14,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:14,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:14,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:14,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:14,553 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:14,553 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:14,561 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:26:14,606 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:26:14,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:14,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:14,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:14,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-09-23 21:26:14,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 21:26:14,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 21:26:14,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:26:14,659 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2018-09-23 21:26:14,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:14,990 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-23 21:26:14,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 21:26:14,990 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2018-09-23 21:26:14,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:14,991 INFO L225 Difference]: With dead ends: 81 [2018-09-23 21:26:14,991 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 21:26:14,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=612, Invalid=1028, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:26:14,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 21:26:15,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-09-23 21:26:15,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 21:26:15,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-23 21:26:15,002 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-09-23 21:26:15,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:15,002 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-23 21:26:15,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 21:26:15,002 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-23 21:26:15,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 21:26:15,003 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:15,003 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-09-23 21:26:15,003 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:15,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:15,004 INFO L82 PathProgramCache]: Analyzing trace with hash -332531425, now seen corresponding path program 33 times [2018-09-23 21:26:15,004 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:15,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:15,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:15,005 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:15,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:15,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:15,495 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:15,495 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:15,502 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:26:15,556 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-23 21:26:15,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:15,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:15,575 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:15,598 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:15,598 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 21:26:15,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 21:26:15,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 21:26:15,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:26:15,599 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2018-09-23 21:26:16,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:16,377 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-09-23 21:26:16,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 21:26:16,377 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-23 21:26:16,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:16,378 INFO L225 Difference]: With dead ends: 116 [2018-09-23 21:26:16,378 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 21:26:16,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=757, Invalid=2323, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:26:16,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 21:26:16,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 21:26:16,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 21:26:16,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-09-23 21:26:16,389 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-09-23 21:26:16,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:16,389 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-09-23 21:26:16,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 21:26:16,389 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-09-23 21:26:16,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 21:26:16,390 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:16,390 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-09-23 21:26:16,390 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:16,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:16,390 INFO L82 PathProgramCache]: Analyzing trace with hash -198022311, now seen corresponding path program 34 times [2018-09-23 21:26:16,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:16,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:16,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:16,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:16,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:16,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:17,070 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:17,070 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:17,079 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:26:17,124 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:26:17,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:17,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:17,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:17,183 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-09-23 21:26:17,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 21:26:17,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 21:26:17,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:26:17,184 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-09-23 21:26:17,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:17,637 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-09-23 21:26:17,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 21:26:17,637 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-09-23 21:26:17,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:17,638 INFO L225 Difference]: With dead ends: 85 [2018-09-23 21:26:17,639 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 21:26:17,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=674, Invalid=1132, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:26:17,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 21:26:17,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-09-23 21:26:17,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 21:26:17,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-09-23 21:26:17,650 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2018-09-23 21:26:17,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:17,650 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-09-23 21:26:17,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 21:26:17,650 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-09-23 21:26:17,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 21:26:17,651 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:17,651 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-09-23 21:26:17,651 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:17,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:17,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1320946603, now seen corresponding path program 35 times [2018-09-23 21:26:17,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:17,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:17,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:17,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:17,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:18,471 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:18,471 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:18,471 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:18,483 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:26:18,536 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-23 21:26:18,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:18,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:18,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:18,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 21:26:18,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 21:26:18,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 21:26:18,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:26:18,577 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2018-09-23 21:26:19,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:19,386 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-09-23 21:26:19,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 21:26:19,386 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-23 21:26:19,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:19,387 INFO L225 Difference]: With dead ends: 122 [2018-09-23 21:26:19,387 INFO L226 Difference]: Without dead ends: 81 [2018-09-23 21:26:19,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:26:19,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-23 21:26:19,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-23 21:26:19,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-23 21:26:19,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-09-23 21:26:19,398 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-09-23 21:26:19,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:19,398 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-09-23 21:26:19,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 21:26:19,399 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-09-23 21:26:19,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 21:26:19,399 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:19,399 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-09-23 21:26:19,399 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:19,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:19,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1626388879, now seen corresponding path program 36 times [2018-09-23 21:26:19,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:19,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:19,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:19,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:19,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:19,792 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:19,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:19,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:19,804 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:26:20,038 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-23 21:26:20,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:20,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:20,159 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:20,179 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:20,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-09-23 21:26:20,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 21:26:20,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 21:26:20,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:26:20,180 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 25 states. [2018-09-23 21:26:20,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:20,587 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-09-23 21:26:20,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 21:26:20,588 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2018-09-23 21:26:20,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:20,588 INFO L225 Difference]: With dead ends: 89 [2018-09-23 21:26:20,588 INFO L226 Difference]: Without dead ends: 87 [2018-09-23 21:26:20,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=739, Invalid=1241, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:26:20,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-23 21:26:20,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2018-09-23 21:26:20,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 21:26:20,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-23 21:26:20,604 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-09-23 21:26:20,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:20,604 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-23 21:26:20,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 21:26:20,604 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-23 21:26:20,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 21:26:20,605 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:20,605 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-09-23 21:26:20,605 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:20,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:20,605 INFO L82 PathProgramCache]: Analyzing trace with hash -408449781, now seen corresponding path program 37 times [2018-09-23 21:26:20,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:20,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:20,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:20,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:20,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:21,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:21,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:21,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:21,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:21,246 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:21,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:21,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 21:26:21,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 21:26:21,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 21:26:21,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:26:21,277 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 42 states. [2018-09-23 21:26:22,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:22,975 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-09-23 21:26:22,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 21:26:22,975 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-23 21:26:22,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:22,976 INFO L225 Difference]: With dead ends: 128 [2018-09-23 21:26:22,976 INFO L226 Difference]: Without dead ends: 85 [2018-09-23 21:26:22,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=921, Invalid=2861, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:26:22,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-23 21:26:22,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-23 21:26:22,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-23 21:26:22,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-09-23 21:26:22,995 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-09-23 21:26:22,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:22,995 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-09-23 21:26:22,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 21:26:22,995 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-09-23 21:26:22,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-23 21:26:22,996 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:22,996 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-09-23 21:26:22,996 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:22,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:22,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1130683067, now seen corresponding path program 38 times [2018-09-23 21:26:22,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:22,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:22,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:22,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:22,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:23,342 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:23,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:23,351 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:26:23,402 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:26:23,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:23,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:23,485 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:23,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-09-23 21:26:23,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 21:26:23,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 21:26:23,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:26:23,487 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-09-23 21:26:24,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:24,002 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-09-23 21:26:24,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 21:26:24,003 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-09-23 21:26:24,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:24,004 INFO L225 Difference]: With dead ends: 93 [2018-09-23 21:26:24,004 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 21:26:24,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=807, Invalid=1355, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:26:24,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 21:26:24,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2018-09-23 21:26:24,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-23 21:26:24,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-09-23 21:26:24,018 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-09-23 21:26:24,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:24,019 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-09-23 21:26:24,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 21:26:24,019 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-09-23 21:26:24,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 21:26:24,019 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:24,019 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-09-23 21:26:24,019 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:24,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:24,020 INFO L82 PathProgramCache]: Analyzing trace with hash 40231745, now seen corresponding path program 39 times [2018-09-23 21:26:24,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:24,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:24,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:24,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:24,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:24,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:24,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:24,917 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:26:24,984 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-23 21:26:24,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:24,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:25,003 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:25,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:25,024 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 21:26:25,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 21:26:25,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 21:26:25,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:26:25,025 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 44 states. [2018-09-23 21:26:26,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:26,022 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-09-23 21:26:26,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 21:26:26,022 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-23 21:26:26,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:26,023 INFO L225 Difference]: With dead ends: 134 [2018-09-23 21:26:26,023 INFO L226 Difference]: Without dead ends: 89 [2018-09-23 21:26:26,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1009, Invalid=3151, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:26:26,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-23 21:26:26,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-23 21:26:26,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-23 21:26:26,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-09-23 21:26:26,040 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2018-09-23 21:26:26,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:26,041 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-09-23 21:26:26,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 21:26:26,041 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-09-23 21:26:26,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 21:26:26,041 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:26,041 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-09-23 21:26:26,042 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:26,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:26,042 INFO L82 PathProgramCache]: Analyzing trace with hash -2030121349, now seen corresponding path program 40 times [2018-09-23 21:26:26,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:26,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:26,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:26,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:26,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:26,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:26,543 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:26,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:26,544 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:26,551 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:26:26,602 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:26:26,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:26,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:26,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:26,682 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-09-23 21:26:26,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 21:26:26,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 21:26:26,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:26:26,682 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 27 states. [2018-09-23 21:26:27,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:27,270 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-09-23 21:26:27,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 21:26:27,270 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2018-09-23 21:26:27,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:27,271 INFO L225 Difference]: With dead ends: 97 [2018-09-23 21:26:27,271 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 21:26:27,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=878, Invalid=1474, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:26:27,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 21:26:27,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2018-09-23 21:26:27,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 21:26:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-23 21:26:27,287 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-09-23 21:26:27,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:27,287 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-23 21:26:27,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 21:26:27,288 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-23 21:26:27,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 21:26:27,288 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:27,288 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-09-23 21:26:27,288 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:27,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:27,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1031530761, now seen corresponding path program 41 times [2018-09-23 21:26:27,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:27,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:27,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:27,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:27,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:28,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:28,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:28,343 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:26:28,407 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-23 21:26:28,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:28,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:28,451 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:28,451 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 21:26:28,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 21:26:28,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 21:26:28,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:26:28,452 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 46 states. [2018-09-23 21:26:29,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:29,107 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-09-23 21:26:29,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 21:26:29,107 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-23 21:26:29,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:29,108 INFO L225 Difference]: With dead ends: 140 [2018-09-23 21:26:29,108 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 21:26:29,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1101, Invalid=3455, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:26:29,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 21:26:29,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-23 21:26:29,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-23 21:26:29,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-09-23 21:26:29,122 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-09-23 21:26:29,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:29,123 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-09-23 21:26:29,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 21:26:29,123 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-09-23 21:26:29,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 21:26:29,123 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:29,123 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-09-23 21:26:29,124 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:29,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:29,124 INFO L82 PathProgramCache]: Analyzing trace with hash 769709361, now seen corresponding path program 42 times [2018-09-23 21:26:29,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:29,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:29,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:29,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:29,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:29,681 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:29,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:29,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:29,690 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:26:29,755 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-09-23 21:26:29,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:29,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:29,811 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:29,811 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-09-23 21:26:29,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 21:26:29,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 21:26:29,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:26:29,812 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-09-23 21:26:30,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:30,271 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-09-23 21:26:30,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 21:26:30,272 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-09-23 21:26:30,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:30,272 INFO L225 Difference]: With dead ends: 101 [2018-09-23 21:26:30,273 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 21:26:30,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=952, Invalid=1598, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:26:30,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 21:26:30,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-09-23 21:26:30,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 21:26:30,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-09-23 21:26:30,289 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2018-09-23 21:26:30,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:30,289 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-09-23 21:26:30,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 21:26:30,289 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-09-23 21:26:30,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-23 21:26:30,290 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:30,290 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-09-23 21:26:30,290 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:30,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:30,290 INFO L82 PathProgramCache]: Analyzing trace with hash 956254253, now seen corresponding path program 43 times [2018-09-23 21:26:30,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:30,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:30,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:30,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:30,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:31,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:31,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:31,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:31,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:31,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:31,171 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:31,171 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 21:26:31,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 21:26:31,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 21:26:31,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:26:31,172 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 48 states. [2018-09-23 21:26:33,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:33,835 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-09-23 21:26:33,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 21:26:33,835 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-23 21:26:33,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:33,836 INFO L225 Difference]: With dead ends: 146 [2018-09-23 21:26:33,836 INFO L226 Difference]: Without dead ends: 97 [2018-09-23 21:26:33,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1197, Invalid=3773, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:26:33,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-23 21:26:33,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-23 21:26:33,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-23 21:26:33,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-09-23 21:26:33,857 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2018-09-23 21:26:33,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:33,857 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-09-23 21:26:33,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 21:26:33,858 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-09-23 21:26:33,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-23 21:26:33,858 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:33,858 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-09-23 21:26:33,859 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:33,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:33,859 INFO L82 PathProgramCache]: Analyzing trace with hash 251550055, now seen corresponding path program 44 times [2018-09-23 21:26:33,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:33,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:33,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:33,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:33,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:34,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:34,686 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:34,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:34,694 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:26:34,750 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:26:34,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:34,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:34,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:34,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-09-23 21:26:34,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 21:26:34,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 21:26:34,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:26:34,852 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 29 states. [2018-09-23 21:26:35,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:35,314 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-09-23 21:26:35,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 21:26:35,315 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2018-09-23 21:26:35,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:35,316 INFO L225 Difference]: With dead ends: 105 [2018-09-23 21:26:35,316 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 21:26:35,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1029, Invalid=1727, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:26:35,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 21:26:35,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-09-23 21:26:35,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 21:26:35,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-23 21:26:35,338 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-09-23 21:26:35,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:35,338 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-23 21:26:35,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 21:26:35,338 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-23 21:26:35,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 21:26:35,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:35,339 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-09-23 21:26:35,339 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:35,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:35,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1221367523, now seen corresponding path program 45 times [2018-09-23 21:26:35,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:35,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:35,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:35,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:35,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:38,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:38,642 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:38,642 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:38,650 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:26:38,719 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-23 21:26:38,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:38,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:38,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:38,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 21:26:38,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 21:26:38,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 21:26:38,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:26:38,760 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 50 states. [2018-09-23 21:26:40,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:40,005 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-09-23 21:26:40,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 21:26:40,005 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-23 21:26:40,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:40,006 INFO L225 Difference]: With dead ends: 152 [2018-09-23 21:26:40,006 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 21:26:40,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1297, Invalid=4105, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:26:40,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 21:26:40,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 21:26:40,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 21:26:40,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-09-23 21:26:40,027 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-09-23 21:26:40,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:40,027 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-09-23 21:26:40,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 21:26:40,027 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-09-23 21:26:40,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-23 21:26:40,028 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:40,028 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-09-23 21:26:40,028 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:40,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:40,029 INFO L82 PathProgramCache]: Analyzing trace with hash -99845347, now seen corresponding path program 46 times [2018-09-23 21:26:40,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:40,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:40,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:40,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:40,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:40,824 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:40,824 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:40,831 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:26:40,891 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:26:40,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:40,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:40,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:40,965 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:40,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-09-23 21:26:40,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 21:26:40,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 21:26:40,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:26:40,966 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-09-23 21:26:41,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:41,674 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-09-23 21:26:41,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 21:26:41,674 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-09-23 21:26:41,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:41,675 INFO L225 Difference]: With dead ends: 109 [2018-09-23 21:26:41,675 INFO L226 Difference]: Without dead ends: 107 [2018-09-23 21:26:41,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1109, Invalid=1861, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:26:41,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-23 21:26:41,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-09-23 21:26:41,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-23 21:26:41,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-09-23 21:26:41,697 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2018-09-23 21:26:41,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:41,698 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-09-23 21:26:41,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 21:26:41,698 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-09-23 21:26:41,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 21:26:41,699 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:41,699 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-09-23 21:26:41,699 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:41,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:41,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1462164711, now seen corresponding path program 47 times [2018-09-23 21:26:41,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:41,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:41,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:41,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:41,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:42,851 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:42,851 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:42,860 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:26:42,939 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-23 21:26:42,939 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:42,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:42,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:42,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:42,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 21:26:42,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 21:26:42,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 21:26:42,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=1951, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:26:42,996 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 52 states. [2018-09-23 21:26:44,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:44,336 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-09-23 21:26:44,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 21:26:44,337 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-23 21:26:44,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:44,337 INFO L225 Difference]: With dead ends: 158 [2018-09-23 21:26:44,337 INFO L226 Difference]: Without dead ends: 105 [2018-09-23 21:26:44,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1401, Invalid=4451, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 21:26:44,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-23 21:26:44,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-23 21:26:44,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-23 21:26:44,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-09-23 21:26:44,360 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-09-23 21:26:44,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:44,360 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-09-23 21:26:44,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 21:26:44,360 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-09-23 21:26:44,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-23 21:26:44,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:44,361 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-09-23 21:26:44,361 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:44,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:44,362 INFO L82 PathProgramCache]: Analyzing trace with hash 850942547, now seen corresponding path program 48 times [2018-09-23 21:26:44,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:44,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:44,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:44,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:44,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:44,758 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:44,758 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:44,766 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:26:44,841 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-23 21:26:44,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:44,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:44,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:44,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:44,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-09-23 21:26:44,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 21:26:44,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 21:26:44,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:26:44,939 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 31 states. [2018-09-23 21:26:45,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:45,516 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-09-23 21:26:45,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 21:26:45,517 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 104 [2018-09-23 21:26:45,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:45,517 INFO L225 Difference]: With dead ends: 113 [2018-09-23 21:26:45,517 INFO L226 Difference]: Without dead ends: 111 [2018-09-23 21:26:45,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1192, Invalid=2000, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:26:45,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-23 21:26:45,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2018-09-23 21:26:45,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-23 21:26:45,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-23 21:26:45,540 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-09-23 21:26:45,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:45,540 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-23 21:26:45,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 21:26:45,540 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-23 21:26:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-23 21:26:45,541 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:45,541 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-09-23 21:26:45,541 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:45,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:45,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1711934671, now seen corresponding path program 49 times [2018-09-23 21:26:45,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:45,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:45,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:45,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:45,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:46,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:46,460 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:46,460 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:46,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:46,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:46,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:46,586 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:46,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 21:26:46,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 21:26:46,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 21:26:46,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:26:46,588 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 54 states. [2018-09-23 21:26:48,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:48,298 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-09-23 21:26:48,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 21:26:48,298 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-23 21:26:48,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:48,300 INFO L225 Difference]: With dead ends: 164 [2018-09-23 21:26:48,300 INFO L226 Difference]: Without dead ends: 109 [2018-09-23 21:26:48,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1509, Invalid=4811, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:26:48,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-23 21:26:48,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-23 21:26:48,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 21:26:48,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-09-23 21:26:48,324 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-09-23 21:26:48,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:48,324 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-09-23 21:26:48,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 21:26:48,324 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-09-23 21:26:48,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 21:26:48,325 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:48,325 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-09-23 21:26:48,325 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:48,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:48,325 INFO L82 PathProgramCache]: Analyzing trace with hash -223930615, now seen corresponding path program 50 times [2018-09-23 21:26:48,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:48,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:48,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:48,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:48,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:48,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:48,920 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:48,920 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:48,928 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:26:48,993 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:26:48,993 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:48,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:49,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:49,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:49,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-09-23 21:26:49,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 21:26:49,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 21:26:49,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:26:49,097 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-09-23 21:26:49,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:49,668 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-09-23 21:26:49,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 21:26:49,668 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-09-23 21:26:49,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:49,669 INFO L225 Difference]: With dead ends: 117 [2018-09-23 21:26:49,670 INFO L226 Difference]: Without dead ends: 115 [2018-09-23 21:26:49,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1278, Invalid=2144, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:26:49,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-23 21:26:49,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2018-09-23 21:26:49,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-23 21:26:49,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-09-23 21:26:49,688 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-09-23 21:26:49,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:49,688 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-09-23 21:26:49,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 21:26:49,689 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-09-23 21:26:49,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 21:26:49,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:49,689 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-09-23 21:26:49,690 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:49,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:49,690 INFO L82 PathProgramCache]: Analyzing trace with hash -449022971, now seen corresponding path program 51 times [2018-09-23 21:26:49,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:49,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:49,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:49,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:49,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:50,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:50,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:50,812 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:26:50,898 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-23 21:26:50,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:50,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:50,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:50,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:50,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 21:26:50,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 21:26:50,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 21:26:50,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=811, Invalid=2269, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:26:50,940 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 56 states. [2018-09-23 21:26:52,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:52,563 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-09-23 21:26:52,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 21:26:52,563 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-23 21:26:52,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:52,564 INFO L225 Difference]: With dead ends: 170 [2018-09-23 21:26:52,564 INFO L226 Difference]: Without dead ends: 113 [2018-09-23 21:26:52,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1621, Invalid=5185, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 21:26:52,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-23 21:26:52,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-23 21:26:52,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-23 21:26:52,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-09-23 21:26:52,583 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2018-09-23 21:26:52,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:52,583 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-09-23 21:26:52,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 21:26:52,583 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-09-23 21:26:52,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-23 21:26:52,583 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:52,583 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-09-23 21:26:52,584 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:52,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:52,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1802883391, now seen corresponding path program 52 times [2018-09-23 21:26:52,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:52,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:52,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:52,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:52,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:53,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:53,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:53,209 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:26:53,275 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:26:53,275 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:53,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:53,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:53,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-09-23 21:26:53,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 21:26:53,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 21:26:53,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:26:53,434 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 33 states. [2018-09-23 21:26:53,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:53,982 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-09-23 21:26:53,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 21:26:53,983 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 112 [2018-09-23 21:26:53,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:53,984 INFO L225 Difference]: With dead ends: 121 [2018-09-23 21:26:53,984 INFO L226 Difference]: Without dead ends: 119 [2018-09-23 21:26:53,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1367, Invalid=2293, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 21:26:53,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-23 21:26:54,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-09-23 21:26:54,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-23 21:26:54,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-23 21:26:54,011 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-09-23 21:26:54,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:54,011 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-23 21:26:54,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 21:26:54,012 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-23 21:26:54,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-23 21:26:54,012 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:54,012 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-09-23 21:26:54,013 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:54,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:54,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1699051707, now seen corresponding path program 53 times [2018-09-23 21:26:54,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:54,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:54,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:54,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:54,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:55,342 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:55,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:55,349 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:26:55,432 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-23 21:26:55,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:55,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:55,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:55,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 21:26:55,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 21:26:55,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 21:26:55,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:26:55,490 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 58 states. [2018-09-23 21:26:56,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:56,869 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-09-23 21:26:56,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 21:26:56,869 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-23 21:26:56,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:56,870 INFO L225 Difference]: With dead ends: 176 [2018-09-23 21:26:56,870 INFO L226 Difference]: Without dead ends: 117 [2018-09-23 21:26:56,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1737, Invalid=5573, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 21:26:56,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-23 21:26:56,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-23 21:26:56,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-23 21:26:56,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-09-23 21:26:56,890 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-09-23 21:26:56,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:56,890 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-09-23 21:26:56,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 21:26:56,890 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-09-23 21:26:56,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-23 21:26:56,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:56,891 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-09-23 21:26:56,891 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:56,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:56,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1220126965, now seen corresponding path program 54 times [2018-09-23 21:26:56,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:56,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:56,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:56,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:56,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:57,746 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:57,746 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:57,753 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:26:57,844 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-09-23 21:26:57,844 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:57,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:57,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:57,981 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-09-23 21:26:57,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 21:26:57,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 21:26:57,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:26:57,982 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-09-23 21:26:58,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:58,561 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-09-23 21:26:58,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 21:26:58,562 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-09-23 21:26:58,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:58,562 INFO L225 Difference]: With dead ends: 125 [2018-09-23 21:26:58,562 INFO L226 Difference]: Without dead ends: 123 [2018-09-23 21:26:58,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1459, Invalid=2447, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 21:26:58,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-23 21:26:58,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-09-23 21:26:58,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-23 21:26:58,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-09-23 21:26:58,583 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2018-09-23 21:26:58,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:58,583 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-09-23 21:26:58,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 21:26:58,583 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-09-23 21:26:58,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-23 21:26:58,583 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:58,583 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-09-23 21:26:58,584 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:58,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:58,584 INFO L82 PathProgramCache]: Analyzing trace with hash 15874801, now seen corresponding path program 55 times [2018-09-23 21:26:58,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:58,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:58,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:58,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:58,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:59,592 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:59,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:59,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:59,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:59,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:59,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-23 21:26:59,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 21:26:59,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 21:26:59,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:26:59,728 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 60 states. [2018-09-23 21:27:01,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:01,527 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-09-23 21:27:01,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 21:27:01,527 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-23 21:27:01,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:01,528 INFO L225 Difference]: With dead ends: 182 [2018-09-23 21:27:01,528 INFO L226 Difference]: Without dead ends: 121 [2018-09-23 21:27:01,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1857, Invalid=5975, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 21:27:01,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-23 21:27:01,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-23 21:27:01,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-23 21:27:01,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-09-23 21:27:01,548 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2018-09-23 21:27:01,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:01,548 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-09-23 21:27:01,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 21:27:01,549 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-09-23 21:27:01,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-23 21:27:01,549 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:01,549 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-09-23 21:27:01,549 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:01,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:01,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1308639701, now seen corresponding path program 56 times [2018-09-23 21:27:01,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:01,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:01,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:01,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:27:01,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:02,144 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:02,145 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:02,152 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:27:02,221 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:27:02,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:02,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:02,418 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:02,419 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-09-23 21:27:02,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 21:27:02,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 21:27:02,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:27:02,419 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 35 states. [2018-09-23 21:27:03,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:03,336 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-09-23 21:27:03,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 21:27:03,337 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2018-09-23 21:27:03,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:03,337 INFO L225 Difference]: With dead ends: 129 [2018-09-23 21:27:03,337 INFO L226 Difference]: Without dead ends: 127 [2018-09-23 21:27:03,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1554, Invalid=2606, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:27:03,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-23 21:27:03,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2018-09-23 21:27:03,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-23 21:27:03,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-09-23 21:27:03,363 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-09-23 21:27:03,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:03,363 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-09-23 21:27:03,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 21:27:03,363 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-09-23 21:27:03,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-23 21:27:03,363 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:03,364 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-09-23 21:27:03,364 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:03,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:03,364 INFO L82 PathProgramCache]: Analyzing trace with hash 822598311, now seen corresponding path program 57 times [2018-09-23 21:27:03,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:03,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:03,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:03,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:03,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:04,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:04,600 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:04,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:04,608 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:27:04,709 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-23 21:27:04,709 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:04,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:04,771 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:04,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-23 21:27:04,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 21:27:04,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 21:27:04,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:27:04,772 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 62 states. [2018-09-23 21:27:06,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:06,585 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-09-23 21:27:06,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 21:27:06,585 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-09-23 21:27:06,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:06,586 INFO L225 Difference]: With dead ends: 188 [2018-09-23 21:27:06,586 INFO L226 Difference]: Without dead ends: 125 [2018-09-23 21:27:06,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1981, Invalid=6391, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 21:27:06,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-23 21:27:06,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-23 21:27:06,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-23 21:27:06,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-09-23 21:27:06,612 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-09-23 21:27:06,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:06,612 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-09-23 21:27:06,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 21:27:06,612 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-09-23 21:27:06,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-23 21:27:06,612 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:06,613 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-09-23 21:27:06,613 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:06,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:06,613 INFO L82 PathProgramCache]: Analyzing trace with hash -858967839, now seen corresponding path program 58 times [2018-09-23 21:27:06,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:06,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:06,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:06,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:06,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:07,125 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:07,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:07,135 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:27:07,210 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:27:07,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:07,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:07,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:07,455 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:07,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-09-23 21:27:07,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 21:27:07,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 21:27:07,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:27:07,456 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-09-23 21:27:08,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:08,332 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-09-23 21:27:08,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 21:27:08,332 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-09-23 21:27:08,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:08,333 INFO L225 Difference]: With dead ends: 133 [2018-09-23 21:27:08,333 INFO L226 Difference]: Without dead ends: 131 [2018-09-23 21:27:08,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1652, Invalid=2770, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 21:27:08,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-23 21:27:08,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2018-09-23 21:27:08,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-23 21:27:08,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-09-23 21:27:08,358 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2018-09-23 21:27:08,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:08,358 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-09-23 21:27:08,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 21:27:08,358 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-09-23 21:27:08,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-23 21:27:08,358 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:08,359 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-09-23 21:27:08,359 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:08,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:08,359 INFO L82 PathProgramCache]: Analyzing trace with hash -834439203, now seen corresponding path program 59 times [2018-09-23 21:27:08,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:08,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:08,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:08,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:08,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:09,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:09,551 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:09,551 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:09,559 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:27:09,655 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-23 21:27:09,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:09,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:09,697 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:09,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-23 21:27:09,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 21:27:09,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 21:27:09,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1055, Invalid=2977, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:27:09,699 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 64 states. [2018-09-23 21:27:11,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:11,684 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2018-09-23 21:27:11,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 21:27:11,685 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-09-23 21:27:11,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:11,685 INFO L225 Difference]: With dead ends: 194 [2018-09-23 21:27:11,685 INFO L226 Difference]: Without dead ends: 129 [2018-09-23 21:27:11,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2109, Invalid=6821, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 21:27:11,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-23 21:27:11,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-23 21:27:11,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-23 21:27:11,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-09-23 21:27:11,708 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-09-23 21:27:11,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:11,708 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-09-23 21:27:11,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 21:27:11,708 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-09-23 21:27:11,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-23 21:27:11,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:11,709 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-09-23 21:27:11,709 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:11,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:11,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1096867561, now seen corresponding path program 60 times [2018-09-23 21:27:11,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:11,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:11,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:11,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:11,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:12,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:12,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:12,234 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:27:12,337 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-09-23 21:27:12,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:12,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:12,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:12,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-09-23 21:27:12,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 21:27:12,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 21:27:12,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:27:12,417 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 37 states. [2018-09-23 21:27:13,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:13,400 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-09-23 21:27:13,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 21:27:13,400 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 128 [2018-09-23 21:27:13,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:13,401 INFO L225 Difference]: With dead ends: 137 [2018-09-23 21:27:13,401 INFO L226 Difference]: Without dead ends: 135 [2018-09-23 21:27:13,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1753, Invalid=2939, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 21:27:13,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-23 21:27:13,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2018-09-23 21:27:13,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-23 21:27:13,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-09-23 21:27:13,426 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-09-23 21:27:13,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:13,426 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-09-23 21:27:13,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 21:27:13,427 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-09-23 21:27:13,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-23 21:27:13,427 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:13,427 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-09-23 21:27:13,427 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:13,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:13,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1822805357, now seen corresponding path program 61 times [2018-09-23 21:27:13,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:13,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:13,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:13,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:13,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:14,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:14,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:14,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-23 21:27:14,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:14,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:14,779 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:14,779 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-23 21:27:14,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 21:27:14,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 21:27:14,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:27:14,780 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 66 states. [2018-09-23 21:27:16,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:16,871 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2018-09-23 21:27:16,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 21:27:16,871 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-09-23 21:27:16,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:16,872 INFO L225 Difference]: With dead ends: 200 [2018-09-23 21:27:16,872 INFO L226 Difference]: Without dead ends: 133 [2018-09-23 21:27:16,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2241, Invalid=7265, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 21:27:16,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-23 21:27:16,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-23 21:27:16,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-23 21:27:16,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-09-23 21:27:16,896 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-09-23 21:27:16,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:16,896 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-09-23 21:27:16,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 21:27:16,896 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-09-23 21:27:16,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-23 21:27:16,897 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:16,897 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-09-23 21:27:16,897 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:16,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:16,897 INFO L82 PathProgramCache]: Analyzing trace with hash 787132109, now seen corresponding path program 62 times [2018-09-23 21:27:16,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:16,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:16,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:16,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:27:16,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:17,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:17,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:17,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:17,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:27:17,649 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:27:17,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:17,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:17,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:17,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-09-23 21:27:17,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 21:27:17,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 21:27:17,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:27:17,849 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-09-23 21:27:18,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:18,860 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-09-23 21:27:18,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 21:27:18,860 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-09-23 21:27:18,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:18,861 INFO L225 Difference]: With dead ends: 141 [2018-09-23 21:27:18,861 INFO L226 Difference]: Without dead ends: 139 [2018-09-23 21:27:18,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1857, Invalid=3113, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:27:18,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-23 21:27:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-09-23 21:27:18,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-23 21:27:18,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-09-23 21:27:18,887 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-09-23 21:27:18,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:18,888 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-09-23 21:27:18,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 21:27:18,888 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-09-23 21:27:18,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-23 21:27:18,888 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:18,889 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-09-23 21:27:18,889 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:18,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:18,889 INFO L82 PathProgramCache]: Analyzing trace with hash 519645897, now seen corresponding path program 63 times [2018-09-23 21:27:18,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:18,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:18,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:18,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:18,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:18,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:20,296 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:20,296 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:20,305 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:27:20,414 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-23 21:27:20,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:20,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:20,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:20,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:20,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-23 21:27:20,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 21:27:20,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 21:27:20,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=3367, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:27:20,477 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 68 states. [2018-09-23 21:27:22,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:22,682 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2018-09-23 21:27:22,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 21:27:22,682 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-09-23 21:27:22,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:22,683 INFO L225 Difference]: With dead ends: 206 [2018-09-23 21:27:22,683 INFO L226 Difference]: Without dead ends: 137 [2018-09-23 21:27:22,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2377, Invalid=7723, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 21:27:22,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-23 21:27:22,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-23 21:27:22,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-23 21:27:22,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-09-23 21:27:22,709 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2018-09-23 21:27:22,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:22,709 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-09-23 21:27:22,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 21:27:22,709 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-09-23 21:27:22,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-23 21:27:22,710 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:22,710 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-09-23 21:27:22,710 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:22,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:22,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1226635779, now seen corresponding path program 64 times [2018-09-23 21:27:22,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:22,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:22,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:22,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:22,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:23,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:23,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:23,564 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:27:23,648 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:27:23,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:23,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:24,171 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:24,172 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-09-23 21:27:24,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 21:27:24,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 21:27:24,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:27:24,173 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 39 states. [2018-09-23 21:27:25,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:25,199 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-09-23 21:27:25,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 21:27:25,200 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 136 [2018-09-23 21:27:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:25,201 INFO L225 Difference]: With dead ends: 145 [2018-09-23 21:27:25,201 INFO L226 Difference]: Without dead ends: 143 [2018-09-23 21:27:25,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1964, Invalid=3292, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 21:27:25,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-23 21:27:25,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-09-23 21:27:25,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-23 21:27:25,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-09-23 21:27:25,229 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-09-23 21:27:25,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:25,229 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-09-23 21:27:25,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 21:27:25,230 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-09-23 21:27:25,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-23 21:27:25,230 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:25,230 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-09-23 21:27:25,231 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:25,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:25,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1975877759, now seen corresponding path program 65 times [2018-09-23 21:27:25,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:25,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:25,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:25,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:25,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:26,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:26,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:26,703 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) [2018-09-23 21:27:26,713 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:26,825 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-23 21:27:26,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:26,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:26,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:26,885 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-23 21:27:26,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 21:27:26,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 21:27:26,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:27:26,886 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 70 states. [2018-09-23 21:27:29,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:29,461 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-09-23 21:27:29,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 21:27:29,461 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-09-23 21:27:29,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:29,462 INFO L225 Difference]: With dead ends: 212 [2018-09-23 21:27:29,462 INFO L226 Difference]: Without dead ends: 141 [2018-09-23 21:27:29,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2517, Invalid=8195, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 21:27:29,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-23 21:27:29,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-23 21:27:29,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-23 21:27:29,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-09-23 21:27:29,490 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-09-23 21:27:29,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:29,490 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-09-23 21:27:29,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 21:27:29,490 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-09-23 21:27:29,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-23 21:27:29,490 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:29,491 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-09-23 21:27:29,491 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:29,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:29,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1050354361, now seen corresponding path program 66 times [2018-09-23 21:27:29,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:29,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:29,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:29,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:29,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:30,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:30,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:30,124 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:27:30,240 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-09-23 21:27:30,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:30,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:30,525 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:30,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-09-23 21:27:30,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 21:27:30,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 21:27:30,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:27:30,526 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-09-23 21:27:31,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:31,298 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-09-23 21:27:31,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 21:27:31,298 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-09-23 21:27:31,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:31,299 INFO L225 Difference]: With dead ends: 149 [2018-09-23 21:27:31,299 INFO L226 Difference]: Without dead ends: 147 [2018-09-23 21:27:31,300 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 [2018-09-23 21:27:31,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-23 21:27:31,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2018-09-23 21:27:31,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-23 21:27:31,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-09-23 21:27:31,328 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2018-09-23 21:27:31,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:31,328 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-09-23 21:27:31,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 21:27:31,328 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-09-23 21:27:31,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-23 21:27:31,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:31,329 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-09-23 21:27:31,329 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:31,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:31,329 INFO L82 PathProgramCache]: Analyzing trace with hash 73159605, now seen corresponding path program 67 times [2018-09-23 21:27:31,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:31,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:31,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:31,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:31,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:32,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:32,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:32,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:27:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:32,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:32,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:32,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-23 21:27:32,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 21:27:32,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 21:27:32,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=3781, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:27:32,955 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 72 states. [2018-09-23 21:27:35,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:35,716 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2018-09-23 21:27:35,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 21:27:35,716 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-09-23 21:27:35,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:35,717 INFO L225 Difference]: With dead ends: 218 [2018-09-23 21:27:35,717 INFO L226 Difference]: Without dead ends: 145 [2018-09-23 21:27:35,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2661, Invalid=8681, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 21:27:35,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-23 21:27:35,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-23 21:27:35,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-23 21:27:35,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-09-23 21:27:35,749 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2018-09-23 21:27:35,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:35,749 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-09-23 21:27:35,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 21:27:35,749 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-09-23 21:27:35,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-23 21:27:35,750 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:35,750 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-09-23 21:27:35,750 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:35,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:35,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1220692207, now seen corresponding path program 68 times [2018-09-23 21:27:35,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:35,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:35,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:35,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:27:35,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:36,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:36,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:36,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:36,392 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:27:36,479 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:27:36,479 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:36,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:36,576 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:36,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-09-23 21:27:36,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 21:27:36,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 21:27:36,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:27:36,577 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 41 states. [2018-09-23 21:27:37,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:37,346 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-09-23 21:27:37,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 21:27:37,346 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 144 [2018-09-23 21:27:37,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:37,347 INFO L225 Difference]: With dead ends: 153 [2018-09-23 21:27:37,347 INFO L226 Difference]: Without dead ends: 151 [2018-09-23 21:27:37,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2187, Invalid=3665, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 21:27:37,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-23 21:27:37,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2018-09-23 21:27:37,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-23 21:27:37,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-09-23 21:27:37,385 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-09-23 21:27:37,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:37,386 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-09-23 21:27:37,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 21:27:37,386 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-09-23 21:27:37,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-23 21:27:37,387 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:37,387 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-09-23 21:27:37,387 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:37,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:37,387 INFO L82 PathProgramCache]: Analyzing trace with hash 559072363, now seen corresponding path program 69 times [2018-09-23 21:27:37,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:37,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:37,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:37,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:37,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:39,291 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:39,292 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:39,299 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:27:39,461 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-23 21:27:39,461 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:39,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:39,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:39,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-23 21:27:39,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 21:27:39,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 21:27:39,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:27:39,510 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 74 states. [2018-09-23 21:27:42,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:42,268 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2018-09-23 21:27:42,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 21:27:42,268 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-09-23 21:27:42,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:42,269 INFO L225 Difference]: With dead ends: 224 [2018-09-23 21:27:42,269 INFO L226 Difference]: Without dead ends: 149 [2018-09-23 21:27:42,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2809, Invalid=9181, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 21:27:42,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-23 21:27:42,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-23 21:27:42,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-23 21:27:42,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-09-23 21:27:42,303 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-09-23 21:27:42,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:42,303 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-09-23 21:27:42,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 21:27:42,303 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-09-23 21:27:42,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-23 21:27:42,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:42,304 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-09-23 21:27:42,305 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:42,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:42,305 INFO L82 PathProgramCache]: Analyzing trace with hash 719817893, now seen corresponding path program 70 times [2018-09-23 21:27:42,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:42,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:42,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:42,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:42,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:43,047 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:43,047 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:43,054 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:27:43,148 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:27:43,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:43,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:43,239 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:43,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-09-23 21:27:43,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 21:27:43,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 21:27:43,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:27:43,240 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-09-23 21:27:44,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:44,311 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-09-23 21:27:44,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 21:27:44,311 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-09-23 21:27:44,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:44,312 INFO L225 Difference]: With dead ends: 157 [2018-09-23 21:27:44,312 INFO L226 Difference]: Without dead ends: 155 [2018-09-23 21:27:44,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2303, Invalid=3859, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 21:27:44,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-23 21:27:44,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2018-09-23 21:27:44,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-23 21:27:44,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-09-23 21:27:44,348 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2018-09-23 21:27:44,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:44,349 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-09-23 21:27:44,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 21:27:44,349 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-09-23 21:27:44,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-23 21:27:44,349 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:44,350 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-09-23 21:27:44,350 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:44,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:44,350 INFO L82 PathProgramCache]: Analyzing trace with hash 255193761, now seen corresponding path program 71 times [2018-09-23 21:27:44,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:44,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:44,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:44,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:44,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:46,034 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:46,034 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:46,042 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:27:46,167 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-23 21:27:46,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:46,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:46,218 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:46,218 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-23 21:27:46,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 21:27:46,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 21:27:46,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1481, Invalid=4219, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:27:46,219 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 76 states. [2018-09-23 21:27:49,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:49,241 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2018-09-23 21:27:49,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 21:27:49,241 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-09-23 21:27:49,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:49,242 INFO L225 Difference]: With dead ends: 230 [2018-09-23 21:27:49,242 INFO L226 Difference]: Without dead ends: 153 [2018-09-23 21:27:49,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2961, Invalid=9695, Unknown=0, NotChecked=0, Total=12656 [2018-09-23 21:27:49,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-23 21:27:49,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-23 21:27:49,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-23 21:27:49,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-09-23 21:27:49,281 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2018-09-23 21:27:49,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:49,281 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-09-23 21:27:49,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 21:27:49,281 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-09-23 21:27:49,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-23 21:27:49,282 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:49,282 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-09-23 21:27:49,282 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:49,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:49,282 INFO L82 PathProgramCache]: Analyzing trace with hash 878185947, now seen corresponding path program 72 times [2018-09-23 21:27:49,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:49,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:49,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:49,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:49,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:49,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:49,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:49,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:49,992 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:27:50,127 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-23 21:27:50,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:50,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:50,265 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:50,265 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2018-09-23 21:27:50,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 21:27:50,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 21:27:50,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:27:50,266 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 43 states. [2018-09-23 21:27:51,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:51,184 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2018-09-23 21:27:51,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 21:27:51,184 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 152 [2018-09-23 21:27:51,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:51,185 INFO L225 Difference]: With dead ends: 161 [2018-09-23 21:27:51,185 INFO L226 Difference]: Without dead ends: 159 [2018-09-23 21:27:51,185 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 [2018-09-23 21:27:51,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-23 21:27:51,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-09-23 21:27:51,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-23 21:27:51,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-09-23 21:27:51,217 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-09-23 21:27:51,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:51,218 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-09-23 21:27:51,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 21:27:51,218 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-09-23 21:27:51,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-23 21:27:51,218 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:51,218 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-09-23 21:27:51,218 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:51,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:51,219 INFO L82 PathProgramCache]: Analyzing trace with hash 2123038295, now seen corresponding path program 73 times [2018-09-23 21:27:51,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:51,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:51,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:51,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:51,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:52,870 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:52,870 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:52,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:27:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:52,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:53,024 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:53,024 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-23 21:27:53,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 21:27:53,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 21:27:53,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 21:27:53,026 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 78 states. [2018-09-23 21:27:56,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:56,281 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2018-09-23 21:27:56,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 21:27:56,282 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-09-23 21:27:56,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:56,282 INFO L225 Difference]: With dead ends: 236 [2018-09-23 21:27:56,282 INFO L226 Difference]: Without dead ends: 157 [2018-09-23 21:27:56,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3117, Invalid=10223, Unknown=0, NotChecked=0, Total=13340 [2018-09-23 21:27:56,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-23 21:27:56,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-23 21:27:56,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-23 21:27:56,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-09-23 21:27:56,315 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-09-23 21:27:56,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:56,315 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-09-23 21:27:56,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 21:27:56,315 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-09-23 21:27:56,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-23 21:27:56,316 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:56,316 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-09-23 21:27:56,316 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:56,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:56,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1034359663, now seen corresponding path program 74 times [2018-09-23 21:27:56,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:56,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:56,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:56,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:27:56,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:27:57,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:57,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:27:57,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:27:57,046 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:27:57,140 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:27:57,140 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:27:57,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:27:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:27:57,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:27:57,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-09-23 21:27:57,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 21:27:57,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 21:27:57,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:27:57,229 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-09-23 21:27:58,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:27:58,146 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2018-09-23 21:27:58,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 21:27:58,146 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-09-23 21:27:58,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:27:58,147 INFO L225 Difference]: With dead ends: 165 [2018-09-23 21:27:58,147 INFO L226 Difference]: Without dead ends: 163 [2018-09-23 21:27:58,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2544, Invalid=4262, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 21:27:58,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-23 21:27:58,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-09-23 21:27:58,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-23 21:27:58,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-09-23 21:27:58,188 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2018-09-23 21:27:58,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:27:58,188 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-09-23 21:27:58,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 21:27:58,188 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-09-23 21:27:58,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-23 21:27:58,188 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:27:58,189 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2018-09-23 21:27:58,189 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:27:58,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:27:58,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1882257523, now seen corresponding path program 75 times [2018-09-23 21:27:58,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:27:58,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:27:58,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:58,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:27:58,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:27:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:28:00,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:00,217 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:28:00,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:28:00,226 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:28:00,365 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-23 21:28:00,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:28:00,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:28:00,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:00,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:28:00,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-23 21:28:00,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 21:28:00,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 21:28:00,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1639, Invalid=4681, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:28:00,416 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 80 states. [2018-09-23 21:28:03,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:28:03,582 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2018-09-23 21:28:03,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-23 21:28:03,582 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-09-23 21:28:03,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:28:03,582 INFO L225 Difference]: With dead ends: 242 [2018-09-23 21:28:03,582 INFO L226 Difference]: Without dead ends: 161 [2018-09-23 21:28:03,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3277, Invalid=10765, Unknown=0, NotChecked=0, Total=14042 [2018-09-23 21:28:03,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-23 21:28:03,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-23 21:28:03,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-23 21:28:03,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-09-23 21:28:03,616 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2018-09-23 21:28:03,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:28:03,616 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-09-23 21:28:03,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 21:28:03,617 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-09-23 21:28:03,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-23 21:28:03,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:28:03,618 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-09-23 21:28:03,618 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:28:03,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:28:03,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1109870791, now seen corresponding path program 76 times [2018-09-23 21:28:03,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:28:03,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:28:03,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:03,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:28:03,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:28:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:04,685 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:28:04,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:28:04,693 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:28:04,788 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:28:04,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:28:04,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:28:04,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:04,879 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:28:04,879 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-09-23 21:28:04,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 21:28:04,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 21:28:04,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:28:04,880 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 45 states. [2018-09-23 21:28:05,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:28:05,825 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-09-23 21:28:05,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-23 21:28:05,825 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 160 [2018-09-23 21:28:05,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:28:05,826 INFO L225 Difference]: With dead ends: 169 [2018-09-23 21:28:05,827 INFO L226 Difference]: Without dead ends: 167 [2018-09-23 21:28:05,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2669, Invalid=4471, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 21:28:05,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-23 21:28:05,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2018-09-23 21:28:05,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-23 21:28:05,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-09-23 21:28:05,867 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-09-23 21:28:05,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:28:05,867 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-09-23 21:28:05,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 21:28:05,867 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-09-23 21:28:05,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-23 21:28:05,868 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:28:05,868 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-09-23 21:28:05,868 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:28:05,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:28:05,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1433873987, now seen corresponding path program 77 times [2018-09-23 21:28:05,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:28:05,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:28:05,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:05,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:28:05,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:28:07,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:07,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:28:07,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:28:07,730 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:28:07,871 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-23 21:28:07,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:28:07,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:28:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:07,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:28:07,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-23 21:28:07,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 21:28:07,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 21:28:07,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 21:28:07,937 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 82 states. [2018-09-23 21:28:11,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:28:11,652 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2018-09-23 21:28:11,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 21:28:11,652 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-09-23 21:28:11,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:28:11,653 INFO L225 Difference]: With dead ends: 248 [2018-09-23 21:28:11,653 INFO L226 Difference]: Without dead ends: 165 [2018-09-23 21:28:11,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3441, Invalid=11321, Unknown=0, NotChecked=0, Total=14762 [2018-09-23 21:28:11,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-23 21:28:11,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-23 21:28:11,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-23 21:28:11,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-09-23 21:28:11,689 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-09-23 21:28:11,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:28:11,689 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-09-23 21:28:11,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 21:28:11,689 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-09-23 21:28:11,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-23 21:28:11,690 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:28:11,690 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-09-23 21:28:11,690 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:28:11,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:28:11,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1292352899, now seen corresponding path program 78 times [2018-09-23 21:28:11,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:28:11,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:28:11,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:11,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:28:11,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:28:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:12,489 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:28:12,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:28:12,498 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:28:12,654 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-09-23 21:28:12,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:28:12,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:28:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:12,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:28:12,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-09-23 21:28:12,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 21:28:12,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 21:28:12,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:28:12,748 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2018-09-23 21:28:13,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:28:13,748 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2018-09-23 21:28:13,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-23 21:28:13,748 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2018-09-23 21:28:13,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:28:13,749 INFO L225 Difference]: With dead ends: 173 [2018-09-23 21:28:13,749 INFO L226 Difference]: Without dead ends: 171 [2018-09-23 21:28:13,750 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 [2018-09-23 21:28:13,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-23 21:28:13,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2018-09-23 21:28:13,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-23 21:28:13,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-09-23 21:28:13,790 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 164 [2018-09-23 21:28:13,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:28:13,790 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-09-23 21:28:13,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 21:28:13,791 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-09-23 21:28:13,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-23 21:28:13,791 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:28:13,791 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1] [2018-09-23 21:28:13,792 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:28:13,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:28:13,792 INFO L82 PathProgramCache]: Analyzing trace with hash -705654151, now seen corresponding path program 79 times [2018-09-23 21:28:13,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:28:13,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:28:13,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:13,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:28:13,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:28:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:16,244 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:28:16,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:28:16,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:28:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:28:16,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:28:16,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:16,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:28:16,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-23 21:28:16,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 21:28:16,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 21:28:16,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1805, Invalid=5167, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 21:28:16,400 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 84 states. [2018-09-23 21:28:20,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:28:20,164 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2018-09-23 21:28:20,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-23 21:28:20,164 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-09-23 21:28:20,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:28:20,165 INFO L225 Difference]: With dead ends: 254 [2018-09-23 21:28:20,165 INFO L226 Difference]: Without dead ends: 169 [2018-09-23 21:28:20,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3609, Invalid=11891, Unknown=0, NotChecked=0, Total=15500 [2018-09-23 21:28:20,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-23 21:28:20,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-23 21:28:20,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-23 21:28:20,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-09-23 21:28:20,205 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 166 [2018-09-23 21:28:20,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:28:20,205 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-09-23 21:28:20,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 21:28:20,205 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-09-23 21:28:20,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-23 21:28:20,206 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:28:20,206 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 1, 1, 1, 1] [2018-09-23 21:28:20,206 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:28:20,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:28:20,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1476855373, now seen corresponding path program 80 times [2018-09-23 21:28:20,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:28:20,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:28:20,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:20,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:28:20,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:28:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:21,076 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:28:21,076 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:28:21,084 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:28:21,181 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:28:21,182 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:28:21,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:28:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:21,259 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:28:21,259 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2018-09-23 21:28:21,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 21:28:21,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 21:28:21,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=1167, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:28:21,260 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 47 states. [2018-09-23 21:28:22,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:28:22,318 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2018-09-23 21:28:22,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-23 21:28:22,318 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 168 [2018-09-23 21:28:22,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:28:22,320 INFO L225 Difference]: With dead ends: 177 [2018-09-23 21:28:22,320 INFO L226 Difference]: Without dead ends: 175 [2018-09-23 21:28:22,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2928, Invalid=4904, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 21:28:22,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-23 21:28:22,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2018-09-23 21:28:22,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-23 21:28:22,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-09-23 21:28:22,359 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2018-09-23 21:28:22,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:28:22,360 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-09-23 21:28:22,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 21:28:22,360 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-09-23 21:28:22,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-23 21:28:22,360 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:28:22,360 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-09-23 21:28:22,361 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:28:22,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:28:22,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1918872529, now seen corresponding path program 81 times [2018-09-23 21:28:22,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:28:22,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:28:22,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:22,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:28:22,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:28:24,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:24,355 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:28:24,355 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:28:24,362 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:28:24,514 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-23 21:28:24,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:28:24,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:28:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:24,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:28:24,593 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-23 21:28:24,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 21:28:24,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 21:28:24,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 21:28:24,595 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 86 states. [2018-09-23 21:28:28,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:28:28,379 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2018-09-23 21:28:28,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-23 21:28:28,380 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-09-23 21:28:28,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:28:28,380 INFO L225 Difference]: With dead ends: 260 [2018-09-23 21:28:28,380 INFO L226 Difference]: Without dead ends: 173 [2018-09-23 21:28:28,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2542 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3781, Invalid=12475, Unknown=0, NotChecked=0, Total=16256 [2018-09-23 21:28:28,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-23 21:28:28,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-23 21:28:28,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-23 21:28:28,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-09-23 21:28:28,420 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2018-09-23 21:28:28,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:28:28,420 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-09-23 21:28:28,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 21:28:28,420 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-09-23 21:28:28,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-23 21:28:28,421 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:28:28,421 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 41, 1, 1, 1, 1] [2018-09-23 21:28:28,421 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:28:28,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:28:28,421 INFO L82 PathProgramCache]: Analyzing trace with hash -900821399, now seen corresponding path program 82 times [2018-09-23 21:28:28,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:28:28,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:28:28,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:28,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:28:28,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:28:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:29,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:28:29,477 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:28:29,487 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:28:29,595 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:28:29,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:28:29,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:28:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:29,675 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:28:29,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-09-23 21:28:29,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 21:28:29,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 21:28:29,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:28:29,676 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 48 states. [2018-09-23 21:28:30,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:28:30,957 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2018-09-23 21:28:30,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-23 21:28:30,957 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 172 [2018-09-23 21:28:30,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:28:30,958 INFO L225 Difference]: With dead ends: 181 [2018-09-23 21:28:30,958 INFO L226 Difference]: Without dead ends: 179 [2018-09-23 21:28:30,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3062, Invalid=5128, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 21:28:30,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-23 21:28:31,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-09-23 21:28:31,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-23 21:28:31,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2018-09-23 21:28:31,005 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 172 [2018-09-23 21:28:31,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:28:31,006 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2018-09-23 21:28:31,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 21:28:31,006 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2018-09-23 21:28:31,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-23 21:28:31,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:28:31,007 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1] [2018-09-23 21:28:31,007 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:28:31,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:28:31,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1893962597, now seen corresponding path program 83 times [2018-09-23 21:28:31,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:28:31,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:28:31,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:31,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:28:31,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:28:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:33,110 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:28:33,110 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:28:33,117 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:28:33,279 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-23 21:28:33,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:28:33,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:28:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:33,336 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:28:33,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-23 21:28:33,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-23 21:28:33,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-23 21:28:33,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1979, Invalid=5677, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 21:28:33,338 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 88 states. [2018-09-23 21:28:35,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:28:35,746 INFO L93 Difference]: Finished difference Result 266 states and 268 transitions. [2018-09-23 21:28:35,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-23 21:28:35,746 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-09-23 21:28:35,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:28:35,747 INFO L225 Difference]: With dead ends: 266 [2018-09-23 21:28:35,747 INFO L226 Difference]: Without dead ends: 177 [2018-09-23 21:28:35,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2667 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3957, Invalid=13073, Unknown=0, NotChecked=0, Total=17030 [2018-09-23 21:28:35,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-23 21:28:35,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-23 21:28:35,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-23 21:28:35,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-09-23 21:28:35,785 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 174 [2018-09-23 21:28:35,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:28:35,785 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-09-23 21:28:35,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-23 21:28:35,785 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-09-23 21:28:35,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-23 21:28:35,786 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:28:35,786 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 42, 1, 1, 1, 1] [2018-09-23 21:28:35,786 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:28:35,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:28:35,787 INFO L82 PathProgramCache]: Analyzing trace with hash -619306849, now seen corresponding path program 84 times [2018-09-23 21:28:35,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:28:35,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:28:35,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:35,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:28:35,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:28:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:36,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:28:36,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:28:36,691 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:28:36,847 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-09-23 21:28:36,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:28:36,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:28:36,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:36,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:28:36,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2018-09-23 21:28:36,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 21:28:36,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 21:28:36,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=1266, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:28:36,948 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 49 states. [2018-09-23 21:28:38,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:28:38,017 INFO L93 Difference]: Finished difference Result 185 states and 186 transitions. [2018-09-23 21:28:38,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-23 21:28:38,017 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 176 [2018-09-23 21:28:38,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:28:38,018 INFO L225 Difference]: With dead ends: 185 [2018-09-23 21:28:38,018 INFO L226 Difference]: Without dead ends: 183 [2018-09-23 21:28:38,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1980 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3199, Invalid=5357, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 21:28:38,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-23 21:28:38,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-09-23 21:28:38,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-23 21:28:38,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-09-23 21:28:38,061 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2018-09-23 21:28:38,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:28:38,061 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-09-23 21:28:38,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 21:28:38,062 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-09-23 21:28:38,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-23 21:28:38,062 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:28:38,062 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-09-23 21:28:38,063 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:28:38,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:28:38,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1846505499, now seen corresponding path program 85 times [2018-09-23 21:28:38,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:28:38,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:28:38,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:38,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:28:38,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:38,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:28:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:40,580 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:28:40,580 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:28:40,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:28:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:28:40,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:28:40,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:40,748 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:28:40,749 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-23 21:28:40,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 21:28:40,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 21:28:40,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 21:28:40,750 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 90 states. [2018-09-23 21:28:43,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:28:43,074 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2018-09-23 21:28:43,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-23 21:28:43,074 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-09-23 21:28:43,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:28:43,075 INFO L225 Difference]: With dead ends: 272 [2018-09-23 21:28:43,075 INFO L226 Difference]: Without dead ends: 181 [2018-09-23 21:28:43,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4137, Invalid=13685, Unknown=0, NotChecked=0, Total=17822 [2018-09-23 21:28:43,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-23 21:28:43,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-23 21:28:43,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-23 21:28:43,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2018-09-23 21:28:43,118 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2018-09-23 21:28:43,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:28:43,118 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2018-09-23 21:28:43,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 21:28:43,118 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2018-09-23 21:28:43,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-23 21:28:43,118 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:28:43,119 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 1, 1, 1, 1] [2018-09-23 21:28:43,119 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:28:43,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:28:43,119 INFO L82 PathProgramCache]: Analyzing trace with hash 895799381, now seen corresponding path program 86 times [2018-09-23 21:28:43,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:28:43,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:28:43,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:43,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:28:43,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:28:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:44,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:28:44,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:28:44,051 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:28:44,158 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:28:44,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:28:44,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:28:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:44,259 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:28:44,259 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2018-09-23 21:28:44,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 21:28:44,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 21:28:44,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:28:44,260 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 50 states. [2018-09-23 21:28:45,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:28:45,668 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2018-09-23 21:28:45,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-23 21:28:45,669 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 180 [2018-09-23 21:28:45,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:28:45,670 INFO L225 Difference]: With dead ends: 189 [2018-09-23 21:28:45,670 INFO L226 Difference]: Without dead ends: 187 [2018-09-23 21:28:45,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3339, Invalid=5591, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 21:28:45,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-23 21:28:45,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2018-09-23 21:28:45,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-23 21:28:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2018-09-23 21:28:45,722 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 180 [2018-09-23 21:28:45,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:28:45,722 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2018-09-23 21:28:45,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 21:28:45,723 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2018-09-23 21:28:45,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-23 21:28:45,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:28:45,723 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1] [2018-09-23 21:28:45,723 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:28:45,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:28:45,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1869679185, now seen corresponding path program 87 times [2018-09-23 21:28:45,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:28:45,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:28:45,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:45,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:28:45,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:28:48,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:48,079 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:28:48,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:28:48,086 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:28:48,262 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-23 21:28:48,262 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:28:48,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:28:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:48,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:28:48,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-23 21:28:48,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-23 21:28:48,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-23 21:28:48,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2161, Invalid=6211, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 21:28:48,321 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 92 states. [2018-09-23 21:28:51,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:28:51,536 INFO L93 Difference]: Finished difference Result 278 states and 280 transitions. [2018-09-23 21:28:51,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-23 21:28:51,537 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-09-23 21:28:51,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:28:51,537 INFO L225 Difference]: With dead ends: 278 [2018-09-23 21:28:51,538 INFO L226 Difference]: Without dead ends: 185 [2018-09-23 21:28:51,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4321, Invalid=14311, Unknown=0, NotChecked=0, Total=18632 [2018-09-23 21:28:51,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-23 21:28:51,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-23 21:28:51,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-23 21:28:51,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2018-09-23 21:28:51,590 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 182 [2018-09-23 21:28:51,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:28:51,591 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2018-09-23 21:28:51,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-23 21:28:51,591 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2018-09-23 21:28:51,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-23 21:28:51,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:28:51,591 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 44, 1, 1, 1, 1] [2018-09-23 21:28:51,592 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:28:51,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:28:51,592 INFO L82 PathProgramCache]: Analyzing trace with hash -800604789, now seen corresponding path program 88 times [2018-09-23 21:28:51,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:28:51,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:28:51,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:51,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:28:51,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:28:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:52,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:28:52,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:28:52,548 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:28:52,666 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:28:52,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:28:52,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:28:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:52,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:28:52,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2018-09-23 21:28:52,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 21:28:52,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 21:28:52,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=1369, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:28:52,763 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand 51 states. [2018-09-23 21:28:53,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:28:53,920 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions. [2018-09-23 21:28:53,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-23 21:28:53,921 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 184 [2018-09-23 21:28:53,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:28:53,921 INFO L225 Difference]: With dead ends: 193 [2018-09-23 21:28:53,922 INFO L226 Difference]: Without dead ends: 191 [2018-09-23 21:28:53,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2162 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3482, Invalid=5830, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 21:28:53,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-23 21:28:53,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2018-09-23 21:28:53,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-23 21:28:53,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-09-23 21:28:53,971 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2018-09-23 21:28:53,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:28:53,971 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-09-23 21:28:53,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 21:28:53,971 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-09-23 21:28:53,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-23 21:28:53,972 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:28:53,972 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-09-23 21:28:53,972 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:28:53,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:28:53,973 INFO L82 PathProgramCache]: Analyzing trace with hash -582123001, now seen corresponding path program 89 times [2018-09-23 21:28:53,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:28:53,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:28:53,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:53,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:28:53,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:28:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:56,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:28:56,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:28:56,786 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:28:56,962 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-23 21:28:56,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:28:56,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:28:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:28:57,029 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:28:57,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-23 21:28:57,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-23 21:28:57,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-23 21:28:57,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 21:28:57,031 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 94 states. [2018-09-23 21:28:58,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:28:58,935 INFO L93 Difference]: Finished difference Result 284 states and 286 transitions. [2018-09-23 21:28:58,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-23 21:28:58,935 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-09-23 21:28:58,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:28:58,936 INFO L225 Difference]: With dead ends: 284 [2018-09-23 21:28:58,936 INFO L226 Difference]: Without dead ends: 189 [2018-09-23 21:28:58,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4509, Invalid=14951, Unknown=0, NotChecked=0, Total=19460 [2018-09-23 21:28:58,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-23 21:28:58,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-23 21:28:58,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-23 21:28:58,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2018-09-23 21:28:58,982 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2018-09-23 21:28:58,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:28:58,982 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2018-09-23 21:28:58,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-23 21:28:58,983 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2018-09-23 21:28:58,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-23 21:28:58,983 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:28:58,983 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 45, 1, 1, 1, 1] [2018-09-23 21:28:58,983 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:28:58,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:28:58,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1060894655, now seen corresponding path program 90 times [2018-09-23 21:28:58,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:28:58,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:28:58,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:58,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:28:58,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:28:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:29:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:29:00,017 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:29:00,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:29:00,025 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:29:00,206 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-09-23 21:29:00,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:29:00,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:29:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:29:00,287 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:29:00,287 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2018-09-23 21:29:00,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 21:29:00,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 21:29:00,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:29:00,288 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 52 states. [2018-09-23 21:29:01,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:29:01,677 INFO L93 Difference]: Finished difference Result 197 states and 198 transitions. [2018-09-23 21:29:01,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-23 21:29:01,677 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 188 [2018-09-23 21:29:01,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:29:01,679 INFO L225 Difference]: With dead ends: 197 [2018-09-23 21:29:01,679 INFO L226 Difference]: Without dead ends: 195 [2018-09-23 21:29:01,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3628, Invalid=6074, Unknown=0, NotChecked=0, Total=9702 [2018-09-23 21:29:01,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-23 21:29:01,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 191. [2018-09-23 21:29:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-23 21:29:01,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2018-09-23 21:29:01,727 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 188 [2018-09-23 21:29:01,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:29:01,728 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2018-09-23 21:29:01,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 21:29:01,728 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2018-09-23 21:29:01,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-23 21:29:01,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:29:01,728 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1] [2018-09-23 21:29:01,729 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:29:01,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:29:01,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1612581059, now seen corresponding path program 91 times [2018-09-23 21:29:01,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:29:01,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:29:01,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:01,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:29:01,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:29:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2162 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:29:04,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:29:04,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:29:04,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:29:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:29:04,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:29:04,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2162 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:29:04,420 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:29:04,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-23 21:29:04,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-23 21:29:04,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-23 21:29:04,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=6769, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 21:29:04,421 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 96 states. [2018-09-23 21:29:08,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:29:08,015 INFO L93 Difference]: Finished difference Result 290 states and 292 transitions. [2018-09-23 21:29:08,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-23 21:29:08,016 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-09-23 21:29:08,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:29:08,016 INFO L225 Difference]: With dead ends: 290 [2018-09-23 21:29:08,016 INFO L226 Difference]: Without dead ends: 193 [2018-09-23 21:29:08,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3197 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4701, Invalid=15605, Unknown=0, NotChecked=0, Total=20306 [2018-09-23 21:29:08,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-23 21:29:08,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-23 21:29:08,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-23 21:29:08,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2018-09-23 21:29:08,064 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 190 [2018-09-23 21:29:08,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:29:08,064 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2018-09-23 21:29:08,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-23 21:29:08,064 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2018-09-23 21:29:08,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-23 21:29:08,065 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:29:08,065 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 46, 1, 1, 1, 1] [2018-09-23 21:29:08,065 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:29:08,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:29:08,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1003933815, now seen corresponding path program 92 times [2018-09-23 21:29:08,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:29:08,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:29:08,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:08,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:29:08,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:29:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:29:09,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:29:09,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:29:09,128 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:29:09,242 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:29:09,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:29:09,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:29:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:29:09,345 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:29:09,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2018-09-23 21:29:09,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 21:29:09,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 21:29:09,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=1476, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:29:09,347 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand 53 states. [2018-09-23 21:29:10,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:29:10,638 INFO L93 Difference]: Finished difference Result 201 states and 202 transitions. [2018-09-23 21:29:10,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-23 21:29:10,638 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 192 [2018-09-23 21:29:10,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:29:10,639 INFO L225 Difference]: With dead ends: 201 [2018-09-23 21:29:10,639 INFO L226 Difference]: Without dead ends: 199 [2018-09-23 21:29:10,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3777, Invalid=6323, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 21:29:10,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-23 21:29:10,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2018-09-23 21:29:10,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-23 21:29:10,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-09-23 21:29:10,692 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2018-09-23 21:29:10,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:29:10,692 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-09-23 21:29:10,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 21:29:10,693 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-09-23 21:29:10,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-23 21:29:10,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:29:10,693 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-09-23 21:29:10,693 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:29:10,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:29:10,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1587312141, now seen corresponding path program 93 times [2018-09-23 21:29:10,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:29:10,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:29:10,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:10,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:29:10,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:29:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:29:13,504 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:29:13,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:29:13,511 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:29:13,698 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-23 21:29:13,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:29:13,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:29:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:29:13,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:29:13,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-23 21:29:13,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-23 21:29:13,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-23 21:29:13,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 21:29:13,761 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 98 states. [2018-09-23 21:29:17,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:29:17,376 INFO L93 Difference]: Finished difference Result 296 states and 298 transitions. [2018-09-23 21:29:17,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-23 21:29:17,376 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-09-23 21:29:17,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:29:17,377 INFO L225 Difference]: With dead ends: 296 [2018-09-23 21:29:17,377 INFO L226 Difference]: Without dead ends: 197 [2018-09-23 21:29:17,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3337 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4897, Invalid=16273, Unknown=0, NotChecked=0, Total=21170 [2018-09-23 21:29:17,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-23 21:29:17,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-23 21:29:17,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-23 21:29:17,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2018-09-23 21:29:17,428 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2018-09-23 21:29:17,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:29:17,428 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2018-09-23 21:29:17,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-23 21:29:17,428 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2018-09-23 21:29:17,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-23 21:29:17,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:29:17,429 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 47, 1, 1, 1, 1] [2018-09-23 21:29:17,429 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:29:17,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:29:17,429 INFO L82 PathProgramCache]: Analyzing trace with hash 410334765, now seen corresponding path program 94 times [2018-09-23 21:29:17,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:29:17,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:29:17,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:17,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:29:17,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:29:18,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:29:18,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:29:18,532 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:29:18,539 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:29:18,665 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:29:18,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:29:18,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:29:18,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:29:18,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:29:18,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2018-09-23 21:29:18,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 21:29:18,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 21:29:18,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:29:18,772 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 54 states. [2018-09-23 21:29:20,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:29:20,134 INFO L93 Difference]: Finished difference Result 205 states and 206 transitions. [2018-09-23 21:29:20,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-23 21:29:20,134 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 196 [2018-09-23 21:29:20,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:29:20,136 INFO L225 Difference]: With dead ends: 205 [2018-09-23 21:29:20,136 INFO L226 Difference]: Without dead ends: 203 [2018-09-23 21:29:20,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3929, Invalid=6577, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 21:29:20,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-23 21:29:20,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-09-23 21:29:20,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-23 21:29:20,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2018-09-23 21:29:20,185 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 196 [2018-09-23 21:29:20,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:29:20,185 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2018-09-23 21:29:20,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 21:29:20,186 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2018-09-23 21:29:20,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-23 21:29:20,186 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:29:20,186 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1, 1, 1] [2018-09-23 21:29:20,186 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:29:20,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:29:20,187 INFO L82 PathProgramCache]: Analyzing trace with hash -805348823, now seen corresponding path program 95 times [2018-09-23 21:29:20,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:29:20,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:29:20,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:20,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:29:20,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:20,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:29:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2352 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:29:23,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:29:23,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:29:23,054 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:29:23,243 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-23 21:29:23,244 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:29:23,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:29:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2352 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:29:23,306 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:29:23,307 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-23 21:29:23,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-23 21:29:23,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-23 21:29:23,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2549, Invalid=7351, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 21:29:23,308 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 100 states. [2018-09-23 21:29:26,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:29:26,974 INFO L93 Difference]: Finished difference Result 302 states and 304 transitions. [2018-09-23 21:29:26,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-23 21:29:26,974 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-09-23 21:29:26,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:29:26,975 INFO L225 Difference]: With dead ends: 302 [2018-09-23 21:29:26,975 INFO L226 Difference]: Without dead ends: 201 [2018-09-23 21:29:26,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3480 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5097, Invalid=16955, Unknown=0, NotChecked=0, Total=22052 [2018-09-23 21:29:26,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-23 21:29:27,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-23 21:29:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-23 21:29:27,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2018-09-23 21:29:27,028 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 198 [2018-09-23 21:29:27,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:29:27,028 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2018-09-23 21:29:27,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-23 21:29:27,028 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2018-09-23 21:29:27,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-23 21:29:27,029 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:29:27,029 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 48, 1, 1, 1, 1] [2018-09-23 21:29:27,029 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:29:27,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:29:27,029 INFO L82 PathProgramCache]: Analyzing trace with hash -779331229, now seen corresponding path program 96 times [2018-09-23 21:29:27,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:29:27,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:29:27,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:27,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:29:27,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:29:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:29:28,173 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:29:28,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:29:28,181 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:29:28,373 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-09-23 21:29:28,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:29:28,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:29:28,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:29:28,478 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:29:28,478 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 54 [2018-09-23 21:29:28,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 21:29:28,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 21:29:28,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:29:28,479 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand 55 states. [2018-09-23 21:29:29,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:29:29,790 INFO L93 Difference]: Finished difference Result 209 states and 210 transitions. [2018-09-23 21:29:29,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-23 21:29:29,791 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 200 [2018-09-23 21:29:29,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:29:29,792 INFO L225 Difference]: With dead ends: 209 [2018-09-23 21:29:29,792 INFO L226 Difference]: Without dead ends: 207 [2018-09-23 21:29:29,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4084, Invalid=6836, Unknown=0, NotChecked=0, Total=10920 [2018-09-23 21:29:29,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-23 21:29:29,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 203. [2018-09-23 21:29:29,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-23 21:29:29,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-09-23 21:29:29,862 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 200 [2018-09-23 21:29:29,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:29:29,862 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-09-23 21:29:29,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 21:29:29,862 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-09-23 21:29:29,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-23 21:29:29,863 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:29:29,863 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1] [2018-09-23 21:29:29,863 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:29:29,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:29:29,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1613068321, now seen corresponding path program 97 times [2018-09-23 21:29:29,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:29:29,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:29:29,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:29,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:29:29,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:29:32,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:29:32,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:29:32,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:29:32,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:29:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:29:33,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:29:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:29:33,165 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:29:33,165 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-23 21:29:33,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-23 21:29:33,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-23 21:29:33,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 21:29:33,166 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 102 states. [2018-09-23 21:29:36,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:29:36,978 INFO L93 Difference]: Finished difference Result 308 states and 310 transitions. [2018-09-23 21:29:36,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-23 21:29:36,978 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-09-23 21:29:36,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:29:36,979 INFO L225 Difference]: With dead ends: 308 [2018-09-23 21:29:36,979 INFO L226 Difference]: Without dead ends: 205 [2018-09-23 21:29:36,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5301, Invalid=17651, Unknown=0, NotChecked=0, Total=22952 [2018-09-23 21:29:36,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-23 21:29:37,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-23 21:29:37,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-23 21:29:37,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2018-09-23 21:29:37,034 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 202 [2018-09-23 21:29:37,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:29:37,034 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2018-09-23 21:29:37,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-23 21:29:37,034 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2018-09-23 21:29:37,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-23 21:29:37,035 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:29:37,035 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 50, 49, 1, 1, 1, 1] [2018-09-23 21:29:37,035 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:29:37,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:29:37,035 INFO L82 PathProgramCache]: Analyzing trace with hash 134306329, now seen corresponding path program 98 times [2018-09-23 21:29:37,035 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:29:37,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:29:37,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:37,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:29:37,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:29:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 2550 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:29:38,276 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:29:38,276 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:29:38,284 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:29:38,407 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:29:38,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:29:38,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:29:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 2550 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:29:38,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:29:38,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2018-09-23 21:29:38,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 21:29:38,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 21:29:38,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1436, Invalid=1644, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:29:38,502 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand 56 states. [2018-09-23 21:29:39,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:29:39,905 INFO L93 Difference]: Finished difference Result 213 states and 214 transitions. [2018-09-23 21:29:39,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-23 21:29:39,906 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 204 [2018-09-23 21:29:39,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:29:39,907 INFO L225 Difference]: With dead ends: 213 [2018-09-23 21:29:39,907 INFO L226 Difference]: Without dead ends: 211 [2018-09-23 21:29:39,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4242, Invalid=7100, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 21:29:39,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-23 21:29:39,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 207. [2018-09-23 21:29:39,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-23 21:29:39,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2018-09-23 21:29:39,962 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 204 [2018-09-23 21:29:39,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:29:39,963 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2018-09-23 21:29:39,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 21:29:39,963 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2018-09-23 21:29:39,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-23 21:29:39,963 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:29:39,964 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 1, 1, 1, 1] [2018-09-23 21:29:39,964 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:29:39,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:29:39,964 INFO L82 PathProgramCache]: Analyzing trace with hash 219296533, now seen corresponding path program 99 times [2018-09-23 21:29:39,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:29:39,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:29:39,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:39,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:29:39,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-23 21:29:41,621 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 21:29:41,625 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 21:29:41,625 INFO L202 PluginConnector]: Adding new model down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 09:29:41 BoogieIcfgContainer [2018-09-23 21:29:41,625 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 21:29:41,626 INFO L168 Benchmark]: Toolchain (without parser) took 236689.51 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -107.5 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 259.9 MB). Peak memory consumption was 152.4 MB. Max. memory is 7.1 GB. [2018-09-23 21:29:41,627 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:29:41,628 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.52 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:29:41,628 INFO L168 Benchmark]: Boogie Preprocessor took 20.30 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:29:41,628 INFO L168 Benchmark]: RCFGBuilder took 330.43 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 21:29:41,629 INFO L168 Benchmark]: TraceAbstraction took 236291.15 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -107.5 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 238.7 MB). Peak memory consumption was 131.2 MB. Max. memory is 7.1 GB. [2018-09-23 21:29:41,630 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 0.17 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.52 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.30 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 330.43 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 236291.15 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -107.5 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 238.7 MB). Peak memory consumption was 131.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while BasicCegarLoop was analyzing trace of length 207 with TraceHistMax 51, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 70 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 236.2s OverallTime, 101 OverallIterations, 51 TraceHistogramMax, 121.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1727 SDtfs, 1115 SDslu, 8075 SDs, 0 SdLazy, 76014 SolverSat, 5793 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 45.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18287 GetRequests, 11664 SyntacticMatches, 0 SemanticMatches, 6623 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108096 ImplicationChecksByTransitivity, 148.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=207occurred in iteration=100, 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: 2.3s AutomataMinimizationTime, 100 MinimizatonAttempts, 200 StatesRemovedByMinimization, 50 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.4s SsaConstructionTime, 8.1s SatisfiabilityAnalysisTime, 96.7s InterpolantComputationTime, 20986 NumberOfCodeBlocks, 20986 NumberOfCodeBlocksAsserted, 1455 NumberOfCheckSat, 20788 ConstructedInterpolants, 0 QuantifiedInterpolants, 8474199 SizeOfPredicates, 294 NumberOfNonLiveVariables, 41454 ConjunctsInSsa, 5488 ConjunctsInUnsatCore, 198 InterpolantComputations, 2 PerfectInterpolantSequences, 171698/338298 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/down.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_21-29-41-639.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_21-29-41-639.csv Completed graceful shutdown