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/jain_5.i_2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:36:03,651 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:36:03,653 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:36:03,672 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:36:03,672 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:36:03,674 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:36:03,676 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:36:03,678 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:36:03,682 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:36:03,689 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:36:03,690 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 23:36:03,731 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 23:36:03,756 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:36:03,756 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:36:03,757 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:36:03,757 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:36:03,759 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:36:03,759 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:36:03,759 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:36:03,759 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:36:03,760 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:36:03,760 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:36:03,760 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:36:03,760 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:36:03,760 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:36:03,762 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:36:03,762 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:36:03,762 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:36:03,763 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:36:03,763 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:36:03,763 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:36:03,763 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:36:03,763 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:36:03,763 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:36:03,764 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:36:03,764 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:36:03,764 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:36:03,764 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:36:03,764 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:36:03,765 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:36:03,765 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:36:03,765 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:36:03,833 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:36:03,849 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:36:03,855 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:36:03,857 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:36:03,857 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:36:03,858 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/jain_5.i_2.bpl [2018-09-30 23:36:03,859 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/jain_5.i_2.bpl' [2018-09-30 23:36:03,914 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:36:03,918 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:36:03,918 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:36:03,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:36:03,919 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:36:03,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:36:03" (1/1) ... [2018-09-30 23:36:03,951 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:36:03" (1/1) ... [2018-09-30 23:36:03,958 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:36:03,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:36:03,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:36:03,960 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:36:03,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:36:03" (1/1) ... [2018-09-30 23:36:03,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:36:03" (1/1) ... [2018-09-30 23:36:03,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:36:03" (1/1) ... [2018-09-30 23:36:03,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:36:03" (1/1) ... [2018-09-30 23:36:03,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:36:03" (1/1) ... [2018-09-30 23:36:03,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:36:03" (1/1) ... [2018-09-30 23:36:03,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:36:03" (1/1) ... [2018-09-30 23:36:03,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:36:03,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:36:03,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:36:03,980 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:36:03,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:36:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:36:04,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 23:36:04,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 23:36:04,284 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 23:36:04,285 INFO L202 PluginConnector]: Adding new model jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:36:04 BoogieIcfgContainer [2018-09-30 23:36:04,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:36:04,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:36:04,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:36:04,293 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:36:04,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:36:03" (1/2) ... [2018-09-30 23:36:04,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37924a08 and model type jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:36:04, skipping insertion in model container [2018-09-30 23:36:04,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:36:04" (2/2) ... [2018-09-30 23:36:04,298 INFO L112 eAbstractionObserver]: Analyzing ICFG jain_5.i_2.bpl [2018-09-30 23:36:04,309 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:36:04,320 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:36:04,376 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:36:04,377 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:36:04,377 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:36:04,377 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:36:04,378 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:36:04,378 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:36:04,378 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:36:04,378 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:36:04,378 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:36:04,397 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 23:36:04,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 23:36:04,405 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:04,406 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 23:36:04,407 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:04,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:04,414 INFO L82 PathProgramCache]: Analyzing trace with hash 925701, now seen corresponding path program 1 times [2018-09-30 23:36:04,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:04,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:04,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:04,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:36:04,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:04,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:04,677 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:36:04,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 23:36:04,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:36:04,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:36:04,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:36:04,711 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2018-09-30 23:36:04,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:04,833 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2018-09-30 23:36:04,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:36:04,835 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-30 23:36:04,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:04,846 INFO L225 Difference]: With dead ends: 12 [2018-09-30 23:36:04,848 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 23:36:04,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:36:04,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 23:36:04,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2018-09-30 23:36:04,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 23:36:04,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 23:36:04,894 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-30 23:36:04,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:04,894 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 23:36:04,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:36:04,895 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 23:36:04,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 23:36:04,895 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:04,895 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-30 23:36:04,896 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:04,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:04,896 INFO L82 PathProgramCache]: Analyzing trace with hash 889531649, now seen corresponding path program 1 times [2018-09-30 23:36:04,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:04,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:04,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:04,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:36:04,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:05,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:05,128 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:05,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:05,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:36:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:05,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:05,693 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 10 [2018-09-30 23:36:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:06,016 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:06,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-09-30 23:36:06,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:36:06,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:36:06,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:36:06,019 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 10 states. [2018-09-30 23:36:06,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:06,170 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 23:36:06,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:36:06,171 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-09-30 23:36:06,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:06,171 INFO L225 Difference]: With dead ends: 12 [2018-09-30 23:36:06,172 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 23:36:06,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:36:06,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 23:36:06,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-09-30 23:36:06,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 23:36:06,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 23:36:06,177 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-30 23:36:06,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:06,179 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 23:36:06,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:36:06,179 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 23:36:06,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:36:06,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:06,180 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-30 23:36:06,180 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:06,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:06,181 INFO L82 PathProgramCache]: Analyzing trace with hash 141355773, now seen corresponding path program 2 times [2018-09-30 23:36:06,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:06,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:06,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:06,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:36:06,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:06,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:06,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:06,376 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:36:06,390 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:36:06,390 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:06,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:06,767 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:06,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-09-30 23:36:06,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:36:06,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:36:06,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:36:06,769 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 12 states. [2018-09-30 23:36:06,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:06,878 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 23:36:06,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:36:06,882 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 8 [2018-09-30 23:36:06,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:06,882 INFO L225 Difference]: With dead ends: 14 [2018-09-30 23:36:06,883 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 23:36:06,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:36:06,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 23:36:06,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-09-30 23:36:06,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 23:36:06,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 23:36:06,888 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-30 23:36:06,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:06,889 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 23:36:06,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:36:06,889 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 23:36:06,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:36:06,890 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:06,890 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-30 23:36:06,890 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:06,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:06,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1596122631, now seen corresponding path program 3 times [2018-09-30 23:36:06,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:06,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:06,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:06,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:06,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:07,379 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:07,380 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:07,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:36:07,404 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 23:36:07,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:07,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:07,614 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:07,614 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 23:36:07,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:36:07,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:36:07,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:36:07,615 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 14 states. [2018-09-30 23:36:07,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:07,744 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 23:36:07,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:36:07,746 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-30 23:36:07,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:07,747 INFO L225 Difference]: With dead ends: 16 [2018-09-30 23:36:07,747 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 23:36:07,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:36:07,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 23:36:07,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2018-09-30 23:36:07,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 23:36:07,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 23:36:07,752 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-30 23:36:07,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:07,753 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 23:36:07,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:36:07,753 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 23:36:07,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 23:36:07,754 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:07,754 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-30 23:36:07,754 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:07,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:07,755 INFO L82 PathProgramCache]: Analyzing trace with hash -570590731, now seen corresponding path program 4 times [2018-09-30 23:36:07,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:07,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:07,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:07,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:07,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:08,050 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:08,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:08,051 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:08,059 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:36:08,094 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:36:08,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:08,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:08,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:08,441 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:08,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-09-30 23:36:08,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:36:08,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:36:08,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:36:08,444 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 16 states. [2018-09-30 23:36:08,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:08,609 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 23:36:08,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:36:08,609 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2018-09-30 23:36:08,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:08,610 INFO L225 Difference]: With dead ends: 18 [2018-09-30 23:36:08,610 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 23:36:08,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:36:08,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 23:36:08,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2018-09-30 23:36:08,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 23:36:08,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 23:36:08,616 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-30 23:36:08,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:08,617 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 23:36:08,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:36:08,617 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 23:36:08,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:36:08,618 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:08,618 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-30 23:36:08,618 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:08,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:08,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1418054385, now seen corresponding path program 5 times [2018-09-30 23:36:08,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:08,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:08,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:08,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:08,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:08,810 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:08,810 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:08,831 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:36:23,394 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 23:36:23,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:23,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:23,779 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:23,780 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-09-30 23:36:23,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:36:23,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:36:23,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:36:23,781 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 18 states. [2018-09-30 23:36:24,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:24,043 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 23:36:24,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:36:24,045 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2018-09-30 23:36:24,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:24,046 INFO L225 Difference]: With dead ends: 20 [2018-09-30 23:36:24,046 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 23:36:24,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:36:24,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 23:36:24,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-09-30 23:36:24,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 23:36:24,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 23:36:24,052 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-30 23:36:24,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:24,053 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 23:36:24,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:36:24,053 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 23:36:24,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 23:36:24,054 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:24,054 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-30 23:36:24,054 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:24,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:24,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1245564141, now seen corresponding path program 6 times [2018-09-30 23:36:24,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:24,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:24,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:24,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:24,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:24,328 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:24,328 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:24,342 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:36:36,696 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:36:36,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:36,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:36,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:36,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-30 23:36:36,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:36:36,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:36:36,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:36:36,923 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 20 states. [2018-09-30 23:36:37,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:37,212 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 23:36:37,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:36:37,213 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 16 [2018-09-30 23:36:37,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:37,215 INFO L225 Difference]: With dead ends: 22 [2018-09-30 23:36:37,215 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 23:36:37,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:36:37,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 23:36:37,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2018-09-30 23:36:37,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 23:36:37,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 23:36:37,221 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-30 23:36:37,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:37,221 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 23:36:37,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:36:37,221 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 23:36:37,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:36:37,222 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:37,222 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-30 23:36:37,222 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:37,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:37,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1308803095, now seen corresponding path program 7 times [2018-09-30 23:36:37,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:37,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:37,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:37,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:37,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:37,613 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:37,613 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:37,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:36:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:37,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:37,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:37,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-09-30 23:36:37,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:36:37,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:36:37,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:36:37,938 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 22 states. [2018-09-30 23:36:39,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:39,173 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 23:36:39,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:36:39,173 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 18 [2018-09-30 23:36:39,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:39,174 INFO L225 Difference]: With dead ends: 24 [2018-09-30 23:36:39,175 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 23:36:39,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:36:39,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 23:36:39,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-09-30 23:36:39,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 23:36:39,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 23:36:39,182 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-30 23:36:39,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:39,182 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 23:36:39,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:36:39,182 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 23:36:39,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 23:36:39,183 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:39,183 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-30 23:36:39,183 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:39,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:39,184 INFO L82 PathProgramCache]: Analyzing trace with hash 665576421, now seen corresponding path program 8 times [2018-09-30 23:36:39,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:39,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:39,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:39,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:36:39,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:39,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:39,552 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:39,552 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:39,552 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:39,561 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:36:39,578 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:36:39,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:39,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:39,883 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:39,883 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2018-09-30 23:36:39,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:36:39,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:36:39,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:36:39,884 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 24 states. [2018-09-30 23:36:40,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:40,546 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 23:36:40,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:36:40,547 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 20 [2018-09-30 23:36:40,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:40,547 INFO L225 Difference]: With dead ends: 26 [2018-09-30 23:36:40,547 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 23:36:40,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:36:40,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 23:36:40,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-09-30 23:36:40,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 23:36:40,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 23:36:40,556 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-30 23:36:40,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:40,557 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 23:36:40,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:36:40,557 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 23:36:40,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:36:40,558 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:40,558 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-30 23:36:40,558 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:40,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:40,558 INFO L82 PathProgramCache]: Analyzing trace with hash -331253535, now seen corresponding path program 9 times [2018-09-30 23:36:40,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:40,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:40,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:40,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:40,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:40,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:40,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:40,958 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:36:45,772 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 23:36:45,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:45,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:46,115 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:46,136 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:46,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2018-09-30 23:36:46,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:36:46,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:36:46,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:36:46,138 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 26 states. [2018-09-30 23:36:46,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:46,564 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 23:36:46,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:36:46,564 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 22 [2018-09-30 23:36:46,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:46,565 INFO L225 Difference]: With dead ends: 28 [2018-09-30 23:36:46,565 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 23:36:46,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:36:46,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 23:36:46,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-09-30 23:36:46,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 23:36:46,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 23:36:46,574 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-30 23:36:46,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:46,575 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 23:36:46,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:36:46,575 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 23:36:46,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 23:36:46,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:46,576 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-30 23:36:46,576 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:46,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:46,576 INFO L82 PathProgramCache]: Analyzing trace with hash -507134243, now seen corresponding path program 10 times [2018-09-30 23:36:46,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:46,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:46,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:46,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:46,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:46,932 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-30 23:36:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:47,265 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:47,265 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:47,282 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:36:47,302 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:36:47,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:47,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:47,599 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:47,600 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2018-09-30 23:36:47,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:36:47,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:36:47,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:36:47,601 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 28 states. [2018-09-30 23:36:48,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:48,359 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 23:36:48,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:36:48,359 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 24 [2018-09-30 23:36:48,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:48,360 INFO L225 Difference]: With dead ends: 30 [2018-09-30 23:36:48,360 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 23:36:48,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=125, Invalid=1207, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:36:48,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 23:36:48,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-09-30 23:36:48,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 23:36:48,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 23:36:48,369 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-30 23:36:48,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:48,370 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 23:36:48,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:36:48,370 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 23:36:48,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:36:48,371 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:48,371 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-30 23:36:48,371 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:48,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:48,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2024770087, now seen corresponding path program 11 times [2018-09-30 23:36:48,371 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:48,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:48,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:48,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:48,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:48,636 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:48,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:48,643 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:38:17,270 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 23:38:17,270 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:38:17,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:38:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:17,877 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:38:17,878 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2018-09-30 23:38:17,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:38:17,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:38:17,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:38:17,880 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 30 states. [2018-09-30 23:38:18,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:38:18,546 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 23:38:18,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:38:18,546 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 26 [2018-09-30 23:38:18,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:38:18,547 INFO L225 Difference]: With dead ends: 32 [2018-09-30 23:38:18,547 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 23:38:18,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:38:18,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 23:38:18,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-09-30 23:38:18,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 23:38:18,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 23:38:18,556 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-30 23:38:18,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:38:18,556 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 23:38:18,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:38:18,556 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 23:38:18,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 23:38:18,557 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:38:18,557 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-30 23:38:18,558 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:38:18,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:38:18,558 INFO L82 PathProgramCache]: Analyzing trace with hash -183935531, now seen corresponding path program 12 times [2018-09-30 23:38:18,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:38:18,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:38:18,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:18,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:38:18,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:38:18,862 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-30 23:38:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:19,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:38:19,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:38:19,569 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:39:26,359 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 23:39:26,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:39:26,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:39:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:27,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:39:27,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-09-30 23:39:27,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 23:39:27,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 23:39:27,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=911, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:39:27,061 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 32 states. [2018-09-30 23:39:27,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:39:27,685 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 23:39:27,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:39:27,685 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 28 [2018-09-30 23:39:27,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:39:27,686 INFO L225 Difference]: With dead ends: 34 [2018-09-30 23:39:27,686 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 23:39:27,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=147, Invalid=1659, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:39:27,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 23:39:27,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-09-30 23:39:27,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 23:39:27,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 23:39:27,695 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-30 23:39:27,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:39:27,696 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 23:39:27,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 23:39:27,696 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 23:39:27,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 23:39:27,697 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:39:27,697 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-30 23:39:27,697 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:39:27,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:39:27,697 INFO L82 PathProgramCache]: Analyzing trace with hash -668453167, now seen corresponding path program 13 times [2018-09-30 23:39:27,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:39:27,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:39:27,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:27,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:39:27,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:39:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:28,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:39:28,033 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:39:28,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:39:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:39:28,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:39:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:28,505 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:39:28,506 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2018-09-30 23:39:28,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:39:28,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:39:28,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1036, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:39:28,507 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 34 states. [2018-09-30 23:39:29,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:39:29,670 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-30 23:39:29,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:39:29,671 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 30 [2018-09-30 23:39:29,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:39:29,671 INFO L225 Difference]: With dead ends: 36 [2018-09-30 23:39:29,672 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 23:39:29,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=158, Invalid=1912, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:39:29,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 23:39:29,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-09-30 23:39:29,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 23:39:29,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 23:39:29,683 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-30 23:39:29,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:39:29,684 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 23:39:29,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:39:29,684 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 23:39:29,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 23:39:29,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:39:29,685 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-30 23:39:29,685 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:39:29,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:39:29,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1861533901, now seen corresponding path program 14 times [2018-09-30 23:39:29,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:39:29,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:39:29,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:29,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:39:29,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:39:30,002 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-30 23:39:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:30,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:39:30,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:39:30,714 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:39:30,744 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:39:30,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:39:30,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:39:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:31,210 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:39:31,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2018-09-30 23:39:31,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 23:39:31,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 23:39:31,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:39:31,212 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 36 states. [2018-09-30 23:39:31,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:39:31,961 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-30 23:39:31,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:39:31,961 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 32 [2018-09-30 23:39:31,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:39:31,962 INFO L225 Difference]: With dead ends: 38 [2018-09-30 23:39:31,962 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 23:39:31,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=169, Invalid=2183, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:39:31,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 23:39:31,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-09-30 23:39:31,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 23:39:31,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 23:39:31,973 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-30 23:39:31,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:39:31,973 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 23:39:31,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 23:39:31,973 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 23:39:31,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 23:39:31,974 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:39:31,974 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-30 23:39:31,975 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:39:31,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:39:31,975 INFO L82 PathProgramCache]: Analyzing trace with hash -2067350583, now seen corresponding path program 15 times [2018-09-30 23:39:31,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:39:31,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:39:31,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:31,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:39:31,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:39:32,433 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:32,433 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:39:32,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:39:32,441 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:40:58,257 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 23:40:58,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:40:58,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:40:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:58,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:40:58,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2018-09-30 23:40:58,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:40:58,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:40:58,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1310, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:40:58,942 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 38 states. [2018-09-30 23:40:59,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:40:59,731 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-30 23:40:59,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:40:59,731 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 34 [2018-09-30 23:40:59,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:40:59,732 INFO L225 Difference]: With dead ends: 40 [2018-09-30 23:40:59,732 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 23:40:59,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=180, Invalid=2472, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:40:59,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 23:40:59,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-09-30 23:40:59,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 23:40:59,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 23:40:59,743 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-30 23:40:59,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:40:59,744 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 23:40:59,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:40:59,744 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 23:40:59,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 23:40:59,744 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:40:59,745 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-30 23:40:59,745 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:40:59,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:40:59,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1845880773, now seen corresponding path program 16 times [2018-09-30 23:40:59,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:40:59,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:40:59,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:59,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:40:59,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:41:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:41:00,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:41:00,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:41:00,230 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:41:00,276 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:41:00,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:41:00,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:41:00,931 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:41:00,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:41:00,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2018-09-30 23:41:00,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 23:41:00,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 23:41:00,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1459, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:41:00,954 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 40 states. [2018-09-30 23:41:02,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:41:02,106 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-30 23:41:02,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:41:02,107 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 36 [2018-09-30 23:41:02,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:41:02,107 INFO L225 Difference]: With dead ends: 42 [2018-09-30 23:41:02,108 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 23:41:02,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=191, Invalid=2779, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:41:02,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 23:41:02,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2018-09-30 23:41:02,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 23:41:02,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 23:41:02,122 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-30 23:41:02,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:41:02,122 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 23:41:02,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 23:41:02,122 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 23:41:02,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 23:41:02,123 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:41:02,123 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-30 23:41:02,123 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:41:02,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:41:02,124 INFO L82 PathProgramCache]: Analyzing trace with hash 69862593, now seen corresponding path program 17 times [2018-09-30 23:41:02,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:41:02,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:41:02,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:02,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:41:02,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:41:02,477 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-30 23:41:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:41:03,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:41:03,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:41:03,093 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:43:52,879 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 23:43:52,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:53,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:54,292 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:54,293 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2018-09-30 23:43:54,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:43:54,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:43:54,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1617, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:43:54,294 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 42 states. [2018-09-30 23:43:55,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:55,112 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-30 23:43:55,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:43:55,112 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 38 [2018-09-30 23:43:55,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:55,113 INFO L225 Difference]: With dead ends: 44 [2018-09-30 23:43:55,113 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 23:43:55,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=202, Invalid=3104, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:43:55,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 23:43:55,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-09-30 23:43:55,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 23:43:55,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 23:43:55,134 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-30 23:43:55,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:55,134 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 23:43:55,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:43:55,134 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 23:43:55,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 23:43:55,135 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:55,135 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-30 23:43:55,136 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:55,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:55,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1581591875, now seen corresponding path program 18 times [2018-09-30 23:43:55,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:55,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:55,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:55,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:55,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:55,705 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:55,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:55,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:55,713 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:46:14,768 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 23:46:14,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:14,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:16,039 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:16,039 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2018-09-30 23:46:16,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 23:46:16,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 23:46:16,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1781, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:46:16,041 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 44 states. [2018-09-30 23:46:17,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:17,127 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-30 23:46:17,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:46:17,128 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 40 [2018-09-30 23:46:17,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:17,128 INFO L225 Difference]: With dead ends: 46 [2018-09-30 23:46:17,129 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 23:46:17,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=213, Invalid=3447, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:46:17,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 23:46:17,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2018-09-30 23:46:17,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 23:46:17,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 23:46:17,139 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-30 23:46:17,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:17,139 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 23:46:17,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 23:46:17,139 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 23:46:17,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 23:46:17,140 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:17,140 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-30 23:46:17,140 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:17,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:17,141 INFO L82 PathProgramCache]: Analyzing trace with hash 508563897, now seen corresponding path program 19 times [2018-09-30 23:46:17,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:17,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:17,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:17,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:17,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:17,596 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:17,596 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:46:17,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:46:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:17,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:18,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:18,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2018-09-30 23:46:18,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:46:18,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:46:18,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1954, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:46:18,306 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 46 states. [2018-09-30 23:46:19,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:19,502 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-30 23:46:19,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:46:19,509 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 42 [2018-09-30 23:46:19,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:19,509 INFO L225 Difference]: With dead ends: 48 [2018-09-30 23:46:19,509 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 23:46:19,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=224, Invalid=3808, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:46:19,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 23:46:19,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2018-09-30 23:46:19,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 23:46:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 23:46:19,522 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-30 23:46:19,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:19,523 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 23:46:19,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:46:19,523 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 23:46:19,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 23:46:19,524 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:19,524 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-30 23:46:19,524 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:19,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:19,524 INFO L82 PathProgramCache]: Analyzing trace with hash -896433739, now seen corresponding path program 20 times [2018-09-30 23:46:19,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:19,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:19,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:19,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:46:19,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:20,188 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:20,188 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:46:20,201 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:46:20,233 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:46:20,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:20,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:20,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:20,933 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2018-09-30 23:46:20,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:46:20,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:46:20,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2135, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:46:20,934 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 48 states. [2018-09-30 23:46:22,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:22,115 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-30 23:46:22,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:46:22,116 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 44 [2018-09-30 23:46:22,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:22,117 INFO L225 Difference]: With dead ends: 50 [2018-09-30 23:46:22,117 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 23:46:22,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=235, Invalid=4187, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:46:22,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 23:46:22,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-09-30 23:46:22,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 23:46:22,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 23:46:22,129 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-30 23:46:22,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:22,129 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 23:46:22,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:46:22,130 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 23:46:22,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 23:46:22,130 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:22,130 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-30 23:46:22,131 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:22,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:22,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1815536305, now seen corresponding path program 21 times [2018-09-30 23:46:22,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:22,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:22,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:22,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:22,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:22,642 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:22,642 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:22,642 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:46:22,663 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:48:53,530 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 23:48:53,530 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:53,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:54,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:54,446 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2018-09-30 23:48:54,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:48:54,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:48:54,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2324, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:48:54,448 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 50 states. [2018-09-30 23:48:56,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:56,002 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-30 23:48:56,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:48:56,004 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 46 [2018-09-30 23:48:56,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:56,005 INFO L225 Difference]: With dead ends: 52 [2018-09-30 23:48:56,005 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 23:48:56,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=246, Invalid=4584, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:48:56,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 23:48:56,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-09-30 23:48:56,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 23:48:56,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 23:48:56,018 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-30 23:48:56,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:56,018 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 23:48:56,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:48:56,018 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 23:48:56,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 23:48:56,018 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:56,019 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-30 23:48:56,019 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:56,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:56,019 INFO L82 PathProgramCache]: Analyzing trace with hash 973599917, now seen corresponding path program 22 times [2018-09-30 23:48:56,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:56,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:56,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:56,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:56,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:56,333 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-30 23:48:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:56,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:56,813 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:56,821 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:48:56,862 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:48:56,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:56,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:57,997 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:57,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 51 [2018-09-30 23:48:57,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 23:48:57,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 23:48:57,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2521, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:48:57,998 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 52 states. [2018-09-30 23:48:59,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:59,259 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-30 23:48:59,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:48:59,259 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 48 [2018-09-30 23:48:59,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:59,260 INFO L225 Difference]: With dead ends: 54 [2018-09-30 23:48:59,260 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 23:48:59,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=257, Invalid=4999, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:48:59,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 23:48:59,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2018-09-30 23:48:59,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 23:48:59,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 23:48:59,276 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-30 23:48:59,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:59,277 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 23:48:59,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 23:48:59,277 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 23:48:59,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 23:48:59,278 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:59,278 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-30 23:48:59,278 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:59,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:59,278 INFO L82 PathProgramCache]: Analyzing trace with hash -673417303, now seen corresponding path program 23 times [2018-09-30 23:48:59,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:59,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:59,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:59,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:59,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:59,598 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-30 23:49:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:00,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:00,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:00,101 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown