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/gauss_sum.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 11:43:45,432 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 11:43:45,434 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 11:43:45,447 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 11:43:45,447 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 11:43:45,449 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 11:43:45,450 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 11:43:45,452 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 11:43:45,453 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 11:43:45,454 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 11:43:45,455 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-02 11:43:45,481 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-02 11:43:45,496 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 11:43:45,497 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 11:43:45,498 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 11:43:45,498 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 11:43:45,498 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 11:43:45,499 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 11:43:45,499 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 11:43:45,499 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 11:43:45,499 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 11:43:45,499 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 11:43:45,500 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 11:43:45,500 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 11:43:45,500 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 11:43:45,500 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 11:43:45,500 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 11:43:45,501 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 11:43:45,501 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 11:43:45,501 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 11:43:45,501 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 11:43:45,501 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 11:43:45,502 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 11:43:45,502 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 11:43:45,502 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:43:45,502 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 11:43:45,502 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 11:43:45,502 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 11:43:45,503 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 11:43:45,503 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 11:43:45,503 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 11:43:45,503 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 11:43:45,553 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 11:43:45,568 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 11:43:45,575 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 11:43:45,576 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 11:43:45,577 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 11:43:45,579 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/gauss_sum.i_3.bpl [2018-10-02 11:43:45,579 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/gauss_sum.i_3.bpl' [2018-10-02 11:43:45,638 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 11:43:45,642 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 11:43:45,643 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 11:43:45,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 11:43:45,643 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 11:43:45,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:45" (1/1) ... [2018-10-02 11:43:45,679 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:45" (1/1) ... [2018-10-02 11:43:45,686 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 11:43:45,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 11:43:45,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 11:43:45,687 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 11:43:45,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:45" (1/1) ... [2018-10-02 11:43:45,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:45" (1/1) ... [2018-10-02 11:43:45,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:45" (1/1) ... [2018-10-02 11:43:45,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:45" (1/1) ... [2018-10-02 11:43:45,705 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:45" (1/1) ... [2018-10-02 11:43:45,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:45" (1/1) ... [2018-10-02 11:43:45,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:45" (1/1) ... [2018-10-02 11:43:45,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 11:43:45,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 11:43:45,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 11:43:45,713 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 11:43:45,714 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:43:45,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-02 11:43:45,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-02 11:43:46,030 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-02 11:43:46,031 INFO L202 PluginConnector]: Adding new model gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:43:46 BoogieIcfgContainer [2018-10-02 11:43:46,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 11:43:46,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 11:43:46,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 11:43:46,039 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 11:43:46,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:45" (1/2) ... [2018-10-02 11:43:46,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff97969 and model type gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:43:46, skipping insertion in model container [2018-10-02 11:43:46,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:43:46" (2/2) ... [2018-10-02 11:43:46,043 INFO L112 eAbstractionObserver]: Analyzing ICFG gauss_sum.i_3.bpl [2018-10-02 11:43:46,054 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 11:43:46,063 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 11:43:46,125 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 11:43:46,126 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 11:43:46,126 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 11:43:46,126 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 11:43:46,127 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 11:43:46,127 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 11:43:46,127 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 11:43:46,127 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 11:43:46,128 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 11:43:46,146 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-02 11:43:46,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-02 11:43:46,160 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:46,161 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-02 11:43:46,162 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:46,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:46,169 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-02 11:43:46,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:46,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:46,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:46,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:46,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:46,267 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:43:46,267 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:43:46,267 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:43:46,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:46,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:46,409 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:43:46,409 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-02 11:43:46,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 11:43:46,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 11:43:46,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:43:46,430 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-02 11:43:46,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:46,478 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-02 11:43:46,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 11:43:46,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-02 11:43:46,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:46,491 INFO L225 Difference]: With dead ends: 11 [2018-10-02 11:43:46,491 INFO L226 Difference]: Without dead ends: 7 [2018-10-02 11:43:46,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:43:46,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-02 11:43:46,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-02 11:43:46,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-02 11:43:46,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-02 11:43:46,534 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-02 11:43:46,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:46,534 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-02 11:43:46,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 11:43:46,534 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-02 11:43:46,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 11:43:46,535 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:46,535 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-02 11:43:46,535 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:46,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:46,536 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-02 11:43:46,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:46,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:46,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:46,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:46,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:46,545 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:43:46,546 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:43:46,546 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:43:46,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:46,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:46,782 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:43:46,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-10-02 11:43:46,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 11:43:46,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 11:43:46,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:43:46,784 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-10-02 11:43:46,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:46,864 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-02 11:43:46,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 11:43:46,865 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-02 11:43:46,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:46,866 INFO L225 Difference]: With dead ends: 11 [2018-10-02 11:43:46,866 INFO L226 Difference]: Without dead ends: 9 [2018-10-02 11:43:46,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:43:46,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-02 11:43:46,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-02 11:43:46,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-02 11:43:46,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-02 11:43:46,871 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-02 11:43:46,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:46,871 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-02 11:43:46,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 11:43:46,872 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-02 11:43:46,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-02 11:43:46,872 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:46,872 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-02 11:43:46,873 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:46,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:46,873 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-10-02 11:43:46,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:46,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:46,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:46,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:46,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:46,883 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:43:46,883 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:43:46,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:43:46,899 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:43:46,920 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:43:46,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:46,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:47,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:47,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:43:47,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-10-02 11:43:47,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 11:43:47,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 11:43:47,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:43:47,061 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-10-02 11:43:47,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:47,194 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-02 11:43:47,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:43:47,198 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-02 11:43:47,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:47,198 INFO L225 Difference]: With dead ends: 13 [2018-10-02 11:43:47,199 INFO L226 Difference]: Without dead ends: 11 [2018-10-02 11:43:47,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:43:47,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-02 11:43:47,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-02 11:43:47,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 11:43:47,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-02 11:43:47,207 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-02 11:43:47,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:47,207 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-02 11:43:47,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 11:43:47,208 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-02 11:43:47,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-02 11:43:47,209 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:47,209 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-02 11:43:47,209 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:47,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:47,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-10-02 11:43:47,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:47,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:47,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:47,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:47,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:47,228 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:43:47,228 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:43:47,229 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:43:47,247 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:43:47,270 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-02 11:43:47,270 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:47,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:47,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:43:47,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-10-02 11:43:47,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:43:47,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:43:47,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:43:47,533 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-02 11:43:47,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:47,614 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-02 11:43:47,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:43:47,615 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-02 11:43:47,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:47,616 INFO L225 Difference]: With dead ends: 15 [2018-10-02 11:43:47,616 INFO L226 Difference]: Without dead ends: 13 [2018-10-02 11:43:47,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:43:47,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-02 11:43:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-02 11:43:47,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-02 11:43:47,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-02 11:43:47,622 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-02 11:43:47,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:47,622 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-02 11:43:47,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:43:47,623 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-02 11:43:47,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-02 11:43:47,623 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:47,624 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-02 11:43:47,624 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:47,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:47,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-10-02 11:43:47,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:47,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:47,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:47,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:47,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:47,635 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:43:47,635 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:43:47,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:43:47,649 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:43:47,693 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:43:47,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:47,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:47,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:43:47,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-10-02 11:43:47,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:43:47,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:43:47,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:43:47,901 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-10-02 11:43:48,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:48,003 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-02 11:43:48,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:43:48,003 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-02 11:43:48,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:48,004 INFO L225 Difference]: With dead ends: 17 [2018-10-02 11:43:48,004 INFO L226 Difference]: Without dead ends: 15 [2018-10-02 11:43:48,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:43:48,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-02 11:43:48,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-02 11:43:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-02 11:43:48,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-02 11:43:48,010 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-02 11:43:48,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:48,010 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-02 11:43:48,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:43:48,011 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-02 11:43:48,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-02 11:43:48,011 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:48,011 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-02 11:43:48,012 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:48,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:48,012 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-10-02 11:43:48,012 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:48,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:48,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:48,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:48,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:48,023 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:43:48,023 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:43:48,023 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:43:48,035 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:43:48,051 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-02 11:43:48,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:48,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:48,229 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:48,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:43:48,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-10-02 11:43:48,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:43:48,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:43:48,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:43:48,254 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-10-02 11:43:48,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:48,550 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-02 11:43:48,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:43:48,551 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-02 11:43:48,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:48,552 INFO L225 Difference]: With dead ends: 19 [2018-10-02 11:43:48,552 INFO L226 Difference]: Without dead ends: 17 [2018-10-02 11:43:48,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:43:48,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-02 11:43:48,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-02 11:43:48,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-02 11:43:48,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-02 11:43:48,558 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-02 11:43:48,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:48,558 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-02 11:43:48,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:43:48,558 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-02 11:43:48,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-02 11:43:48,559 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:48,559 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-02 11:43:48,560 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:48,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:48,560 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-10-02 11:43:48,560 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:48,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:48,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:48,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:48,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:48,572 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:43:48,573 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:43:48,573 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:43:48,593 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:43:48,614 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:43:48,615 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:48,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:48,818 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:48,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:43:48,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-10-02 11:43:48,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:43:48,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:43:48,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:43:48,841 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-10-02 11:43:49,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:49,011 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-02 11:43:49,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:43:49,015 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-02 11:43:49,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:49,015 INFO L225 Difference]: With dead ends: 21 [2018-10-02 11:43:49,016 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 11:43:49,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:43:49,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 11:43:49,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-02 11:43:49,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 11:43:49,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-02 11:43:49,022 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-02 11:43:49,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:49,022 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-02 11:43:49,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:43:49,023 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-02 11:43:49,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-02 11:43:49,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:49,023 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-02 11:43:49,024 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:49,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:49,024 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-10-02 11:43:49,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:49,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:49,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:49,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:49,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:49,037 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:43:49,037 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:43:49,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:43:49,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:49,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:49,341 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:43:49,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-10-02 11:43:49,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:43:49,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:43:49,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:43:49,342 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-10-02 11:43:49,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:49,449 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-02 11:43:49,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:43:49,451 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-02 11:43:49,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:49,452 INFO L225 Difference]: With dead ends: 23 [2018-10-02 11:43:49,452 INFO L226 Difference]: Without dead ends: 21 [2018-10-02 11:43:49,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:43:49,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-02 11:43:49,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-02 11:43:49,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-02 11:43:49,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-02 11:43:49,458 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-02 11:43:49,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:49,459 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-02 11:43:49,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:43:49,459 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-02 11:43:49,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-02 11:43:49,460 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:49,460 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-02 11:43:49,460 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:49,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:49,461 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-10-02 11:43:49,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:49,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:49,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:49,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:49,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:49,474 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:43:49,475 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:43:49,475 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:43:49,497 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:43:49,514 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:43:49,515 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:49,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:49,754 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:43:49,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-10-02 11:43:49,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:43:49,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:43:49,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:43:49,755 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-10-02 11:43:49,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:49,955 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-02 11:43:49,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:43:49,955 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-02 11:43:49,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:49,956 INFO L225 Difference]: With dead ends: 25 [2018-10-02 11:43:49,956 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 11:43:49,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:43:49,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 11:43:49,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-02 11:43:49,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-02 11:43:49,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-02 11:43:49,962 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-02 11:43:49,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:49,963 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-02 11:43:49,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:43:49,963 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-02 11:43:49,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-02 11:43:49,964 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:49,964 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-02 11:43:49,964 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:49,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:49,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-10-02 11:43:49,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:49,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:49,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:49,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:49,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:49,977 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:43:49,977 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:43:49,977 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:43:49,987 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:43:50,009 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-02 11:43:50,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:50,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:50,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:43:50,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-02 11:43:50,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 11:43:50,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 11:43:50,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:43:50,261 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-10-02 11:43:50,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:50,417 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-02 11:43:50,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 11:43:50,418 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-02 11:43:50,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:50,419 INFO L225 Difference]: With dead ends: 27 [2018-10-02 11:43:50,419 INFO L226 Difference]: Without dead ends: 25 [2018-10-02 11:43:50,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:43:50,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-02 11:43:50,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-02 11:43:50,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-02 11:43:50,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-02 11:43:50,426 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-02 11:43:50,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:50,426 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-02 11:43:50,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 11:43:50,426 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-02 11:43:50,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-02 11:43:50,427 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:50,427 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-10-02 11:43:50,427 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:50,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:50,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-10-02 11:43:50,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:50,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:50,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:50,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:50,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:50,442 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:43:50,443 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:43:50,443 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:43:50,457 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:43:50,478 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:43:50,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:50,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:50,813 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:50,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:43:50,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-10-02 11:43:50,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-02 11:43:50,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-02 11:43:50,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:43:50,835 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-10-02 11:43:51,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:51,115 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-02 11:43:51,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 11:43:51,116 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-02 11:43:51,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:51,117 INFO L225 Difference]: With dead ends: 29 [2018-10-02 11:43:51,118 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 11:43:51,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:43:51,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 11:43:51,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-02 11:43:51,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-02 11:43:51,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-02 11:43:51,125 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-02 11:43:51,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:51,126 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-02 11:43:51,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-02 11:43:51,127 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-02 11:43:51,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-02 11:43:51,127 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:51,128 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-02 11:43:51,128 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:51,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:51,128 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-10-02 11:43:51,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:51,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:51,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:51,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:51,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:51,139 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:43:51,140 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:43:51,140 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:43:51,150 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:43:51,172 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-02 11:43:51,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:51,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:51,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:43:51,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-10-02 11:43:51,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:43:51,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:43:51,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:43:51,679 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-10-02 11:43:51,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:51,870 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-02 11:43:51,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 11:43:51,870 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-02 11:43:51,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:51,872 INFO L225 Difference]: With dead ends: 31 [2018-10-02 11:43:51,872 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 11:43:51,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:43:51,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 11:43:51,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-02 11:43:51,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-02 11:43:51,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-02 11:43:51,879 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-02 11:43:51,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:51,880 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-02 11:43:51,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:43:51,880 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-02 11:43:51,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-02 11:43:51,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:51,881 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-10-02 11:43:51,881 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:51,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:51,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-10-02 11:43:51,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:51,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:51,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:51,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:51,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:51,904 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:43:51,904 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:43:51,904 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:43:51,915 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:43:51,943 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-02 11:43:51,943 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:51,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:52,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:43:52,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-10-02 11:43:52,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 11:43:52,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 11:43:52,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:43:52,205 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-10-02 11:43:52,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:52,610 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-02 11:43:52,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 11:43:52,610 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-02 11:43:52,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:52,611 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:43:52,611 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:43:52,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:43:52,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:43:52,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-02 11:43:52,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-02 11:43:52,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-02 11:43:52,618 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-02 11:43:52,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:52,619 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-02 11:43:52,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 11:43:52,619 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-02 11:43:52,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-02 11:43:52,619 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:52,620 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-02 11:43:52,620 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:52,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:52,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-10-02 11:43:52,620 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:52,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:52,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:52,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:52,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:52,630 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:43:52,630 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:43:52,630 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:43:52,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:52,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:52,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:54,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:43:54,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-02 11:43:54,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 11:43:54,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 11:43:54,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:43:54,082 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-10-02 11:43:54,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:54,650 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-02 11:43:54,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 11:43:54,650 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-02 11:43:54,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:54,651 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:43:54,651 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:43:54,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:43:54,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:43:54,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-02 11:43:54,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-02 11:43:54,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-02 11:43:54,658 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-02 11:43:54,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:54,659 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-02 11:43:54,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 11:43:54,660 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-02 11:43:54,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-02 11:43:54,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:54,661 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-10-02 11:43:54,661 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:54,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:54,661 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-10-02 11:43:54,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:54,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:54,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:54,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:54,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:54,683 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:43:54,686 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:43:54,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:43:54,704 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:43:54,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:43:54,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:54,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:55,155 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:55,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:43:55,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-10-02 11:43:55,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 11:43:55,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 11:43:55,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:43:55,184 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-10-02 11:43:55,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:55,514 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-02 11:43:55,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 11:43:55,514 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-02 11:43:55,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:55,515 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:43:55,516 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:43:55,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:43:55,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:43:55,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-02 11:43:55,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-02 11:43:55,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-02 11:43:55,522 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-02 11:43:55,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:55,522 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-02 11:43:55,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 11:43:55,522 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-02 11:43:55,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 11:43:55,523 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:55,523 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-02 11:43:55,523 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:55,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:55,524 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-10-02 11:43:55,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:55,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:55,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:55,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:55,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:55,535 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:43:55,535 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:43:55,535 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:43:55,552 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:43:55,610 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-02 11:43:55,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:55,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:55,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:43:55,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-02 11:43:55,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 11:43:55,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 11:43:55,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:43:55,892 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-10-02 11:43:56,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:56,118 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-02 11:43:56,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 11:43:56,119 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-02 11:43:56,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:56,120 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:43:56,120 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:43:56,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:43:56,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:43:56,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-02 11:43:56,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-02 11:43:56,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-02 11:43:56,127 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-10-02 11:43:56,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:56,128 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-02 11:43:56,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 11:43:56,128 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-02 11:43:56,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-02 11:43:56,128 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:56,129 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-10-02 11:43:56,129 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:56,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:56,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-10-02 11:43:56,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:56,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:56,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:56,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:56,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:56,140 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:43:56,141 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:43:56,141 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:43:56,154 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:43:56,183 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:43:56,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:56,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:56,549 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:56,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:43:56,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-10-02 11:43:56,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-02 11:43:56,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-02 11:43:56,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:43:56,570 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-10-02 11:43:56,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:56,862 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-02 11:43:56,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 11:43:56,865 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-02 11:43:56,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:56,865 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:43:56,866 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:43:56,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:43:56,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:43:56,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-02 11:43:56,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-02 11:43:56,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-02 11:43:56,872 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-10-02 11:43:56,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:56,872 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-02 11:43:56,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-02 11:43:56,872 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-02 11:43:56,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-02 11:43:56,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:56,873 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-10-02 11:43:56,874 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:56,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:56,874 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-10-02 11:43:56,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:56,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:56,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:56,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:56,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:56,884 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:43:56,885 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:43:56,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:43:56,900 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:43:56,934 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-02 11:43:56,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:56,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:57,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:43:57,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-02 11:43:57,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 11:43:57,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 11:43:57,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:43:57,433 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-10-02 11:43:57,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:57,905 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-02 11:43:57,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 11:43:57,905 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-02 11:43:57,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:57,906 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:43:57,906 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:43:57,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:43:57,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:43:57,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-02 11:43:57,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-02 11:43:57,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-02 11:43:57,913 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-10-02 11:43:57,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:57,913 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-02 11:43:57,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 11:43:57,913 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-02 11:43:57,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-02 11:43:57,914 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:57,914 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-10-02 11:43:57,914 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:57,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:57,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-10-02 11:43:57,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:57,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:57,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:57,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:57,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:57,924 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:43:57,924 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:43:57,924 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:43:57,940 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:43:57,994 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-02 11:43:57,995 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:57,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:58,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:43:58,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-02 11:43:58,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-02 11:43:58,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-02 11:43:58,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:43:58,333 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-10-02 11:43:59,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:59,056 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-02 11:43:59,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 11:43:59,057 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-02 11:43:59,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:59,058 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:43:59,058 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:43:59,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:43:59,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:43:59,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-02 11:43:59,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-02 11:43:59,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-02 11:43:59,065 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-10-02 11:43:59,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:59,066 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-02 11:43:59,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-02 11:43:59,066 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-02 11:43:59,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-02 11:43:59,067 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:59,067 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-10-02 11:43:59,067 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:59,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:59,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-10-02 11:43:59,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:59,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:59,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:59,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:59,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:59,078 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:43:59,078 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:43:59,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:43:59,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:59,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:59,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:59,738 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:59,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:43:59,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-10-02 11:43:59,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 11:43:59,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 11:43:59,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:43:59,769 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-10-02 11:44:00,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:00,267 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-02 11:44:00,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 11:44:00,267 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-02 11:44:00,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:00,268 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:44:00,268 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:44:00,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:44:00,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:44:00,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-02 11:44:00,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-02 11:44:00,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-02 11:44:00,278 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-10-02 11:44:00,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:00,278 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-02 11:44:00,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 11:44:00,279 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-02 11:44:00,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-02 11:44:00,279 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:00,279 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-10-02 11:44:00,280 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:00,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:00,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-10-02 11:44:00,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:00,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:00,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:00,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:44:00,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:00,289 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:00,290 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:00,290 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:00,304 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:44:00,335 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:44:00,335 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:00,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:00,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:00,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-02 11:44:00,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-02 11:44:00,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-02 11:44:00,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:44:00,709 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-10-02 11:44:01,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:01,119 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-02 11:44:01,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 11:44:01,120 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-02 11:44:01,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:01,121 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:44:01,121 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:44:01,122 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:44:01,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:44:01,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-02 11:44:01,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-02 11:44:01,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-02 11:44:01,128 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-10-02 11:44:01,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:01,128 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-02 11:44:01,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-02 11:44:01,128 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-02 11:44:01,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-02 11:44:01,129 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:01,129 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-10-02 11:44:01,129 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:01,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:01,130 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-10-02 11:44:01,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:01,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:01,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:01,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:01,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:01,142 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:01,142 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:01,142 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:01,160 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:44:01,288 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-02 11:44:01,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:01,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:01,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:01,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-10-02 11:44:01,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 11:44:01,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 11:44:01,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:44:01,854 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-10-02 11:44:02,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:02,227 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-02 11:44:02,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 11:44:02,230 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-02 11:44:02,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:02,231 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:44:02,231 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:44:02,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:44:02,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:44:02,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-02 11:44:02,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-02 11:44:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-02 11:44:02,236 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-10-02 11:44:02,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:02,236 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-02 11:44:02,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 11:44:02,236 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-02 11:44:02,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-02 11:44:02,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:02,237 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-10-02 11:44:02,237 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:02,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:02,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-10-02 11:44:02,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:02,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:02,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:02,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:02,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:02,246 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:02,246 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:02,246 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:02,267 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:44:02,302 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:44:02,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:02,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:02,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:02,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-02 11:44:02,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-02 11:44:02,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-02 11:44:02,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:44:02,721 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-10-02 11:44:03,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:03,147 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-02 11:44:03,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 11:44:03,147 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-02 11:44:03,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:03,148 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:44:03,148 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:44:03,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:44:03,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:44:03,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-02 11:44:03,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-02 11:44:03,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-02 11:44:03,155 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-10-02 11:44:03,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:03,155 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-02 11:44:03,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-02 11:44:03,156 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-02 11:44:03,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-02 11:44:03,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:03,156 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-10-02 11:44:03,156 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:03,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:03,157 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-10-02 11:44:03,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:03,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:03,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:03,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:03,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:03,165 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:03,166 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:03,166 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:03,185 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:44:03,240 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-02 11:44:03,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:03,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:03,752 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:03,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:03,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-02 11:44:03,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 11:44:03,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 11:44:03,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:44:03,774 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-10-02 11:44:04,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:04,246 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-02 11:44:04,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 11:44:04,246 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-02 11:44:04,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:04,247 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:44:04,247 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:44:04,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:44:04,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:44:04,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-02 11:44:04,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-02 11:44:04,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-02 11:44:04,253 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-10-02 11:44:04,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:04,253 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-02 11:44:04,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 11:44:04,254 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-02 11:44:04,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-02 11:44:04,254 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:04,254 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-10-02 11:44:04,254 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:04,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:04,254 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-10-02 11:44:04,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:04,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:04,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:04,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:04,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:04,263 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:04,263 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:04,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:04,284 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:44:04,378 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-02 11:44:04,379 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:04,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:05,037 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:05,059 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:05,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-10-02 11:44:05,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-02 11:44:05,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-02 11:44:05,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:44:05,060 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-10-02 11:44:05,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:05,667 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-02 11:44:05,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 11:44:05,667 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-02 11:44:05,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:05,668 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:44:05,668 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:44:05,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:44:05,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:44:05,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-02 11:44:05,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-02 11:44:05,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-02 11:44:05,675 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-10-02 11:44:05,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:05,675 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-02 11:44:05,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-02 11:44:05,675 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-02 11:44:05,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-02 11:44:05,676 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:05,676 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-10-02 11:44:05,676 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:05,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:05,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-10-02 11:44:05,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:05,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:05,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:05,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:05,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:05,685 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:05,686 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:05,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-10-02 11:44:05,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:05,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:05,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:06,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:06,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-10-02 11:44:06,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 11:44:06,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 11:44:06,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:44:06,219 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-10-02 11:44:06,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:06,777 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-02 11:44:06,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 11:44:06,778 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-02 11:44:06,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:06,778 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:44:06,778 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:44:06,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:44:06,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:44:06,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-02 11:44:06,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-02 11:44:06,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-02 11:44:06,784 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-10-02 11:44:06,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:06,784 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-02 11:44:06,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 11:44:06,785 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-02 11:44:06,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-02 11:44:06,785 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:06,785 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-10-02 11:44:06,785 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:06,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:06,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-10-02 11:44:06,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:06,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:06,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:06,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:44:06,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:06,795 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:06,795 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:06,795 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:06,809 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:44:06,855 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:44:06,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:06,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:07,324 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:07,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:07,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-02 11:44:07,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 11:44:07,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 11:44:07,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:44:07,345 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-10-02 11:44:08,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:08,026 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-02 11:44:08,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 11:44:08,027 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-02 11:44:08,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:08,027 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:44:08,028 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:44:08,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:44:08,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:44:08,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-02 11:44:08,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-02 11:44:08,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-02 11:44:08,033 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-10-02 11:44:08,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:08,033 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-02 11:44:08,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 11:44:08,033 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-02 11:44:08,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-02 11:44:08,034 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:08,034 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-10-02 11:44:08,034 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:08,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:08,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-10-02 11:44:08,035 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:08,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:08,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:08,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:08,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:08,042 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:08,042 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:08,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-10-02 11:44:08,057 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:08,370 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-02 11:44:08,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:08,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:08,931 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:08,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:08,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-02 11:44:08,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 11:44:08,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 11:44:08,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:44:08,952 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-10-02 11:44:09,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:09,630 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-02 11:44:09,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 11:44:09,630 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-02 11:44:09,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:09,631 INFO L225 Difference]: With dead ends: 63 [2018-10-02 11:44:09,631 INFO L226 Difference]: Without dead ends: 61 [2018-10-02 11:44:09,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:44:09,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-02 11:44:09,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-02 11:44:09,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-02 11:44:09,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-02 11:44:09,635 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-10-02 11:44:09,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:09,636 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-02 11:44:09,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 11:44:09,636 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-02 11:44:09,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-02 11:44:09,636 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:09,636 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-10-02 11:44:09,636 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:09,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:09,637 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-10-02 11:44:09,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:09,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:09,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:09,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:09,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:09,644 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:09,644 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:09,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:09,654 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:44:09,703 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:44:09,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:09,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:10,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:10,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-02 11:44:10,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-02 11:44:10,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-02 11:44:10,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:44:10,370 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-10-02 11:44:11,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:11,076 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-02 11:44:11,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 11:44:11,077 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-02 11:44:11,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:11,078 INFO L225 Difference]: With dead ends: 65 [2018-10-02 11:44:11,078 INFO L226 Difference]: Without dead ends: 63 [2018-10-02 11:44:11,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:44:11,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-02 11:44:11,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-02 11:44:11,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-02 11:44:11,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-02 11:44:11,084 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-10-02 11:44:11,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:11,084 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-02 11:44:11,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-02 11:44:11,085 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-02 11:44:11,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-02 11:44:11,085 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:11,085 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-10-02 11:44:11,086 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:11,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:11,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-10-02 11:44:11,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:11,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:11,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:11,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:11,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:11,094 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:11,095 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:11,095 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:11,108 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:44:11,180 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-02 11:44:11,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:11,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:11,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:11,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-10-02 11:44:11,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 11:44:11,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 11:44:11,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:44:11,796 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-10-02 11:44:12,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:12,577 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-02 11:44:12,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 11:44:12,578 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-02 11:44:12,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:12,579 INFO L225 Difference]: With dead ends: 67 [2018-10-02 11:44:12,579 INFO L226 Difference]: Without dead ends: 65 [2018-10-02 11:44:12,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:44:12,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-02 11:44:12,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-02 11:44:12,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-02 11:44:12,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-02 11:44:12,586 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-10-02 11:44:12,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:12,587 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-02 11:44:12,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 11:44:12,587 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-02 11:44:12,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-02 11:44:12,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:12,588 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-10-02 11:44:12,588 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:12,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:12,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-10-02 11:44:12,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:12,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:12,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:12,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:12,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:12,596 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:12,596 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:12,596 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:12,611 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:44:12,938 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-02 11:44:12,939 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:12,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:13,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:13,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-02 11:44:13,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-02 11:44:13,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-02 11:44:13,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:44:13,611 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-10-02 11:44:14,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:14,403 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-02 11:44:14,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 11:44:14,403 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-02 11:44:14,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:14,404 INFO L225 Difference]: With dead ends: 69 [2018-10-02 11:44:14,404 INFO L226 Difference]: Without dead ends: 67 [2018-10-02 11:44:14,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:44:14,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-02 11:44:14,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-02 11:44:14,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-02 11:44:14,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-02 11:44:14,411 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-10-02 11:44:14,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:14,411 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-02 11:44:14,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-02 11:44:14,411 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-02 11:44:14,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-02 11:44:14,412 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:14,412 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-10-02 11:44:14,412 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:14,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:14,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-10-02 11:44:14,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:14,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:14,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:14,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:14,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:14,420 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:14,420 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:14,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-10-02 11:44:14,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:14,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:15,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:15,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-02 11:44:15,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 11:44:15,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 11:44:15,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:44:15,442 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-10-02 11:44:16,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:16,370 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-02 11:44:16,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 11:44:16,370 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-02 11:44:16,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:16,371 INFO L225 Difference]: With dead ends: 71 [2018-10-02 11:44:16,371 INFO L226 Difference]: Without dead ends: 69 [2018-10-02 11:44:16,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:44:16,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-02 11:44:16,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-02 11:44:16,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-02 11:44:16,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-02 11:44:16,377 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-10-02 11:44:16,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:16,378 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-02 11:44:16,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 11:44:16,378 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-02 11:44:16,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-02 11:44:16,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:16,379 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-10-02 11:44:16,379 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:16,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:16,379 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-10-02 11:44:16,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:16,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:16,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:16,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:44:16,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:16,386 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:16,386 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:16,386 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:16,399 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:44:16,458 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:44:16,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:16,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:17,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:17,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:17,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-10-02 11:44:17,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-02 11:44:17,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-02 11:44:17,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:44:17,197 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-10-02 11:44:18,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:18,049 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-02 11:44:18,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 11:44:18,049 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-02 11:44:18,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:18,050 INFO L225 Difference]: With dead ends: 73 [2018-10-02 11:44:18,050 INFO L226 Difference]: Without dead ends: 71 [2018-10-02 11:44:18,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:44:18,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-02 11:44:18,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-02 11:44:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-02 11:44:18,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-02 11:44:18,056 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-10-02 11:44:18,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:18,057 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-02 11:44:18,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-02 11:44:18,057 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-02 11:44:18,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-02 11:44:18,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:18,058 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-10-02 11:44:18,058 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:18,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:18,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-10-02 11:44:18,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:18,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:18,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:18,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:18,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:18,065 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:18,065 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:18,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:18,079 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:44:18,764 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-02 11:44:18,764 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:18,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:19,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:19,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-10-02 11:44:19,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 11:44:19,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 11:44:19,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:44:19,627 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-10-02 11:44:20,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:20,631 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-02 11:44:20,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 11:44:20,632 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-02 11:44:20,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:20,633 INFO L225 Difference]: With dead ends: 75 [2018-10-02 11:44:20,633 INFO L226 Difference]: Without dead ends: 73 [2018-10-02 11:44:20,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:44:20,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-02 11:44:20,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-02 11:44:20,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-02 11:44:20,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-02 11:44:20,639 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-10-02 11:44:20,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:20,639 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-02 11:44:20,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 11:44:20,640 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-02 11:44:20,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-02 11:44:20,640 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:20,640 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-10-02 11:44:20,641 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:20,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:20,641 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-10-02 11:44:20,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:20,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:20,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:20,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:20,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:20,648 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:20,648 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:20,649 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:20,663 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:44:20,737 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:44:20,738 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:20,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:22,202 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:22,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-02 11:44:22,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-02 11:44:22,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-02 11:44:22,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:44:22,203 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-10-02 11:44:23,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:23,116 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-02 11:44:23,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 11:44:23,117 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-02 11:44:23,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:23,118 INFO L225 Difference]: With dead ends: 77 [2018-10-02 11:44:23,118 INFO L226 Difference]: Without dead ends: 75 [2018-10-02 11:44:23,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:44:23,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-02 11:44:23,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-02 11:44:23,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-02 11:44:23,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-02 11:44:23,124 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-10-02 11:44:23,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:23,124 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-02 11:44:23,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-02 11:44:23,125 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-02 11:44:23,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-02 11:44:23,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:23,125 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-10-02 11:44:23,125 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:23,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:23,126 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-10-02 11:44:23,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:23,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:23,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:23,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:23,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:23,133 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:23,133 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:23,134 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:23,144 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:44:23,228 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-02 11:44:23,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:23,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:24,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:24,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-02 11:44:24,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 11:44:24,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 11:44:24,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:44:24,491 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-10-02 11:44:25,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:25,622 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-02 11:44:25,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 11:44:25,622 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-02 11:44:25,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:25,623 INFO L225 Difference]: With dead ends: 79 [2018-10-02 11:44:25,624 INFO L226 Difference]: Without dead ends: 77 [2018-10-02 11:44:25,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:44:25,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-02 11:44:25,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-02 11:44:25,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-02 11:44:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-02 11:44:25,629 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-10-02 11:44:25,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:25,630 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-02 11:44:25,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 11:44:25,630 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-02 11:44:25,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-02 11:44:25,631 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:25,631 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-10-02 11:44:25,631 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:25,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:25,631 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-10-02 11:44:25,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:25,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:25,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:25,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:25,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:25,640 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:25,640 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:25,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:25,656 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:44:25,916 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-02 11:44:25,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:25,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:26,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:26,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-02 11:44:26,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-02 11:44:26,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-02 11:44:26,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:44:26,781 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-10-02 11:44:27,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:27,820 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-02 11:44:27,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 11:44:27,820 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-02 11:44:27,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:27,821 INFO L225 Difference]: With dead ends: 81 [2018-10-02 11:44:27,821 INFO L226 Difference]: Without dead ends: 79 [2018-10-02 11:44:27,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:44:27,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-02 11:44:27,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-02 11:44:27,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-02 11:44:27,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-02 11:44:27,828 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-10-02 11:44:27,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:27,828 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-02 11:44:27,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-02 11:44:27,828 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-02 11:44:27,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-02 11:44:27,829 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:27,829 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-10-02 11:44:27,829 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:27,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:27,829 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-10-02 11:44:27,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:27,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:27,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:27,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:27,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:27,837 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:27,837 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:27,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:27,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:44:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:27,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:28,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:28,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-10-02 11:44:28,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 11:44:28,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 11:44:28,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:44:28,779 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-10-02 11:44:29,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:29,854 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-02 11:44:29,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 11:44:29,855 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-02 11:44:29,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:29,856 INFO L225 Difference]: With dead ends: 83 [2018-10-02 11:44:29,856 INFO L226 Difference]: Without dead ends: 81 [2018-10-02 11:44:29,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:44:29,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-02 11:44:29,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-02 11:44:29,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-02 11:44:29,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-02 11:44:29,862 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-10-02 11:44:29,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:29,862 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-02 11:44:29,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 11:44:29,862 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-02 11:44:29,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-02 11:44:29,862 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:29,863 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-10-02 11:44:29,863 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:29,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:29,863 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-10-02 11:44:29,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:29,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:29,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:29,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:44:29,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:29,870 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:29,871 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:29,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-10-02 11:44:29,885 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:29,971 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:44:29,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:29,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:31,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:31,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-02 11:44:31,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 11:44:31,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 11:44:31,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:44:31,532 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-10-02 11:44:32,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:32,649 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-02 11:44:32,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 11:44:32,650 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-02 11:44:32,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:32,651 INFO L225 Difference]: With dead ends: 85 [2018-10-02 11:44:32,651 INFO L226 Difference]: Without dead ends: 83 [2018-10-02 11:44:32,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:44:32,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-02 11:44:32,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-02 11:44:32,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-02 11:44:32,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-02 11:44:32,658 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-10-02 11:44:32,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:32,659 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-02 11:44:32,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 11:44:32,659 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-02 11:44:32,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-02 11:44:32,659 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:32,659 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-10-02 11:44:32,659 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:32,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:32,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-10-02 11:44:32,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:32,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:32,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:32,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:32,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:32,668 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:32,668 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:32,668 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:32,684 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:44:34,086 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-02 11:44:34,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:34,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:35,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:35,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:35,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-02 11:44:35,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 11:44:35,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 11:44:35,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:44:35,053 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-10-02 11:44:36,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:36,410 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-02 11:44:36,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 11:44:36,411 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-02 11:44:36,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:36,412 INFO L225 Difference]: With dead ends: 87 [2018-10-02 11:44:36,412 INFO L226 Difference]: Without dead ends: 85 [2018-10-02 11:44:36,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:44:36,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-02 11:44:36,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-02 11:44:36,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-02 11:44:36,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-02 11:44:36,419 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-10-02 11:44:36,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:36,419 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-02 11:44:36,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 11:44:36,419 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-02 11:44:36,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-02 11:44:36,420 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:36,420 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-10-02 11:44:36,420 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:36,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:36,421 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-10-02 11:44:36,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:36,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:36,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:36,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:36,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:36,428 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:36,429 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:36,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:36,443 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:44:36,541 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:44:36,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:36,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:37,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:37,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:37,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-02 11:44:37,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-02 11:44:37,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-02 11:44:37,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:44:37,589 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-10-02 11:44:38,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:38,820 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-02 11:44:38,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 11:44:38,820 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-02 11:44:38,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:38,821 INFO L225 Difference]: With dead ends: 89 [2018-10-02 11:44:38,821 INFO L226 Difference]: Without dead ends: 87 [2018-10-02 11:44:38,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:44:38,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-02 11:44:38,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-02 11:44:38,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-02 11:44:38,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-02 11:44:38,828 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-10-02 11:44:38,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:38,829 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-02 11:44:38,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-02 11:44:38,829 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-02 11:44:38,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-02 11:44:38,829 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:38,829 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-10-02 11:44:38,830 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:38,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:38,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-10-02 11:44:38,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:38,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:38,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:38,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:38,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:38,838 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:38,838 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:38,839 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:38,849 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:44:38,969 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-02 11:44:38,969 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:38,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:40,999 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:40,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-10-02 11:44:40,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 11:44:41,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 11:44:41,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:44:41,000 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-10-02 11:44:42,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:42,360 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-02 11:44:42,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 11:44:42,360 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-02 11:44:42,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:42,361 INFO L225 Difference]: With dead ends: 91 [2018-10-02 11:44:42,362 INFO L226 Difference]: Without dead ends: 89 [2018-10-02 11:44:42,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:44:42,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-02 11:44:42,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-02 11:44:42,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-02 11:44:42,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-02 11:44:42,370 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-10-02 11:44:42,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:42,371 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-02 11:44:42,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 11:44:42,371 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-02 11:44:42,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-02 11:44:42,372 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:42,372 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-10-02 11:44:42,372 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:42,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:42,373 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-10-02 11:44:42,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:42,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:42,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:42,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:42,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:42,382 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:42,382 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:42,382 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:42,415 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:44:42,736 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-02 11:44:42,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:42,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:43,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:43,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-02 11:44:43,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-02 11:44:43,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-02 11:44:43,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:44:43,783 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-10-02 11:44:45,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:45,212 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-02 11:44:45,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 11:44:45,213 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-02 11:44:45,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:45,214 INFO L225 Difference]: With dead ends: 93 [2018-10-02 11:44:45,214 INFO L226 Difference]: Without dead ends: 91 [2018-10-02 11:44:45,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:44:45,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-02 11:44:45,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-02 11:44:45,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-02 11:44:45,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-02 11:44:45,221 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-10-02 11:44:45,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:45,221 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-02 11:44:45,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-02 11:44:45,221 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-02 11:44:45,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-02 11:44:45,221 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:45,221 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-10-02 11:44:45,222 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:45,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:45,222 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-10-02 11:44:45,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:45,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:45,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:45,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:45,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:45,228 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:45,229 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:45,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:45,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:44:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:45,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:46,567 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:46,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-10-02 11:44:46,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 11:44:46,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 11:44:46,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:44:46,569 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-10-02 11:44:47,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:47,978 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-02 11:44:47,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 11:44:47,979 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-02 11:44:47,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:47,980 INFO L225 Difference]: With dead ends: 95 [2018-10-02 11:44:47,980 INFO L226 Difference]: Without dead ends: 93 [2018-10-02 11:44:47,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:44:47,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-02 11:44:47,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-02 11:44:47,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-02 11:44:47,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-02 11:44:47,986 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-10-02 11:44:47,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:47,986 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-02 11:44:47,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 11:44:47,986 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-02 11:44:47,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-02 11:44:47,987 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:47,987 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-10-02 11:44:47,987 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:47,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:47,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-10-02 11:44:47,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:47,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:47,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:47,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:44:47,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:47,994 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:47,995 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:47,995 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:48,005 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:44:48,116 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:44:48,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:48,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:49,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:49,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-02 11:44:49,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 11:44:49,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 11:44:49,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:44:49,238 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-10-02 11:44:50,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:50,901 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-02 11:44:50,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 11:44:50,902 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-02 11:44:50,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:50,903 INFO L225 Difference]: With dead ends: 97 [2018-10-02 11:44:50,903 INFO L226 Difference]: Without dead ends: 95 [2018-10-02 11:44:50,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:44:50,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-02 11:44:50,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-02 11:44:50,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-02 11:44:50,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-02 11:44:50,910 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-10-02 11:44:50,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:50,911 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-02 11:44:50,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 11:44:50,911 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-02 11:44:50,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-02 11:44:50,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:50,911 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-10-02 11:44:50,912 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:50,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:50,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-10-02 11:44:50,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:50,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:50,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:50,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:50,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:50,921 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:50,921 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:50,921 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:50,938 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:44:53,671 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-02 11:44:53,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:53,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:54,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:54,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-10-02 11:44:54,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 11:44:54,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 11:44:54,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:44:54,858 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-10-02 11:44:56,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:56,520 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-02 11:44:56,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 11:44:56,520 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-02 11:44:56,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:56,521 INFO L225 Difference]: With dead ends: 99 [2018-10-02 11:44:56,521 INFO L226 Difference]: Without dead ends: 97 [2018-10-02 11:44:56,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:44:56,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-02 11:44:56,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-02 11:44:56,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-02 11:44:56,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-02 11:44:56,528 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-10-02 11:44:56,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:56,528 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-02 11:44:56,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 11:44:56,528 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-02 11:44:56,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-02 11:44:56,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:56,529 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-10-02 11:44:56,529 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:56,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:56,529 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-10-02 11:44:56,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:56,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:56,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:56,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:56,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:56,537 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:56,537 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:56,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:56,552 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:44:56,684 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:44:56,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:56,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:58,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:44:58,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-02 11:44:58,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-02 11:44:58,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-02 11:44:58,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:44:58,063 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-10-02 11:44:59,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:59,709 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-02 11:44:59,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 11:44:59,709 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-02 11:44:59,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:59,711 INFO L225 Difference]: With dead ends: 101 [2018-10-02 11:44:59,711 INFO L226 Difference]: Without dead ends: 99 [2018-10-02 11:44:59,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:44:59,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-02 11:44:59,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-02 11:44:59,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-02 11:44:59,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-02 11:44:59,717 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-10-02 11:44:59,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:59,718 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-02 11:44:59,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-02 11:44:59,718 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-02 11:44:59,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-02 11:44:59,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:59,718 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-10-02 11:44:59,719 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:59,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:59,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-10-02 11:44:59,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:59,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:59,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:59,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:59,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:59,727 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:44:59,727 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:44:59,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:44:59,735 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:44:59,890 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-02 11:44:59,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:59,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:01,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:45:01,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-10-02 11:45:01,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 11:45:01,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 11:45:01,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:45:01,491 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-10-02 11:45:03,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:03,186 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-02 11:45:03,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 11:45:03,187 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-02 11:45:03,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:03,188 INFO L225 Difference]: With dead ends: 103 [2018-10-02 11:45:03,188 INFO L226 Difference]: Without dead ends: 101 [2018-10-02 11:45:03,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:45:03,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-02 11:45:03,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-02 11:45:03,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-02 11:45:03,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-02 11:45:03,195 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-10-02 11:45:03,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:03,196 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-02 11:45:03,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 11:45:03,196 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-02 11:45:03,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-02 11:45:03,196 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:03,197 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-10-02 11:45:03,197 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:03,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:03,197 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-10-02 11:45:03,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:03,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:03,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:03,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:03,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:03,205 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:45:03,205 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:45:03,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:45:03,217 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:45:05,114 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-02 11:45:05,115 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:05,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:06,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:45:06,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-10-02 11:45:06,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-02 11:45:06,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-02 11:45:06,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:45:06,651 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-10-02 11:45:08,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:08,463 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-02 11:45:08,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 11:45:08,464 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-02 11:45:08,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:08,465 INFO L225 Difference]: With dead ends: 105 [2018-10-02 11:45:08,465 INFO L226 Difference]: Without dead ends: 103 [2018-10-02 11:45:08,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:45:08,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-02 11:45:08,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-02 11:45:08,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-02 11:45:08,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-02 11:45:08,471 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-10-02 11:45:08,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:08,471 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-02 11:45:08,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-02 11:45:08,472 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-02 11:45:08,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-02 11:45:08,472 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:08,472 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-10-02 11:45:08,472 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:08,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:08,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-10-02 11:45:08,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:08,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:08,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:08,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:08,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:08,480 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:45:08,480 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:45:08,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:45:08,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:45:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:08,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:09,991 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:45:09,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-10-02 11:45:09,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 11:45:09,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 11:45:09,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:45:09,993 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-10-02 11:45:11,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:11,979 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-02 11:45:11,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 11:45:11,979 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-02 11:45:11,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:11,980 INFO L225 Difference]: With dead ends: 107 [2018-10-02 11:45:11,980 INFO L226 Difference]: Without dead ends: 105 [2018-10-02 11:45:11,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:45:11,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-02 11:45:11,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-02 11:45:11,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-02 11:45:11,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-02 11:45:11,988 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-10-02 11:45:11,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:11,988 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-02 11:45:11,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 11:45:11,988 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-02 11:45:11,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-02 11:45:11,989 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:11,989 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-10-02 11:45:11,989 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:11,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:11,990 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-10-02 11:45:11,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:11,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:11,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:11,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:45:11,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:11,998 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:45:11,998 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:45:11,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:45:12,015 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:45:12,122 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:45:12,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:12,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:13,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:45:13,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-02 11:45:13,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 11:45:13,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 11:45:13,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:45:13,611 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-10-02 11:45:15,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:15,544 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-02 11:45:15,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 11:45:15,545 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-02 11:45:15,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:15,545 INFO L225 Difference]: With dead ends: 109 [2018-10-02 11:45:15,546 INFO L226 Difference]: Without dead ends: 107 [2018-10-02 11:45:15,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:45:15,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-02 11:45:15,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-02 11:45:15,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-02 11:45:15,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-02 11:45:15,552 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-10-02 11:45:15,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:15,552 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-02 11:45:15,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 11:45:15,552 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-02 11:45:15,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-02 11:45:15,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:15,553 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-10-02 11:45:15,555 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:15,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:15,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-10-02 11:45:15,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:15,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:15,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:15,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:15,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:15,565 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:45:15,565 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:45:15,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-10-02 11:45:15,581 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:45:20,321 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-02 11:45:20,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:20,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:22,654 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:45:22,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-10-02 11:45:22,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 11:45:22,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 11:45:22,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:45:22,656 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-10-02 11:45:24,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:24,662 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-02 11:45:24,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 11:45:24,662 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-02 11:45:24,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:24,663 INFO L225 Difference]: With dead ends: 111 [2018-10-02 11:45:24,663 INFO L226 Difference]: Without dead ends: 109 [2018-10-02 11:45:24,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:45:24,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-02 11:45:24,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-02 11:45:24,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-02 11:45:24,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-02 11:45:24,672 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-10-02 11:45:24,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:24,672 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-02 11:45:24,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 11:45:24,672 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-02 11:45:24,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-02 11:45:24,673 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:24,673 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-10-02 11:45:24,673 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:24,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:24,674 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-10-02 11:45:24,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:24,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:24,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:24,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:24,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:24,682 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:45:24,682 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:45:24,683 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:45:24,692 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:45:24,861 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:45:24,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:24,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:28,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:28,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:45:28,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-02 11:45:28,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-02 11:45:28,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-02 11:45:28,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:45:28,059 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-10-02 11:45:30,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:30,157 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-02 11:45:30,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 11:45:30,158 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-02 11:45:30,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:30,159 INFO L225 Difference]: With dead ends: 113 [2018-10-02 11:45:30,159 INFO L226 Difference]: Without dead ends: 111 [2018-10-02 11:45:30,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:45:30,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-02 11:45:30,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-02 11:45:30,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-02 11:45:30,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-02 11:45:30,168 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-10-02 11:45:30,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:30,168 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-02 11:45:30,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-02 11:45:30,168 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-02 11:45:30,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-02 11:45:30,169 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:30,169 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-10-02 11:45:30,169 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:30,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:30,170 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-10-02 11:45:30,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:30,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:30,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:30,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:30,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:30,177 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:45:30,178 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:45:30,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:45:30,191 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:45:30,378 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-02 11:45:30,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:30,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:32,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:45:32,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-10-02 11:45:32,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 11:45:32,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 11:45:32,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:45:32,215 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-10-02 11:45:34,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:34,346 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-02 11:45:34,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 11:45:34,347 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-02 11:45:34,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:34,348 INFO L225 Difference]: With dead ends: 115 [2018-10-02 11:45:34,348 INFO L226 Difference]: Without dead ends: 113 [2018-10-02 11:45:34,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:45:34,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-02 11:45:34,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-02 11:45:34,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-02 11:45:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-02 11:45:34,354 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-10-02 11:45:34,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:34,355 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-02 11:45:34,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 11:45:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-02 11:45:34,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-02 11:45:34,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:34,355 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-10-02 11:45:34,356 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:34,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:34,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-10-02 11:45:34,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:34,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:34,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:34,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:34,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:34,364 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:45:34,365 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:45:34,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:45:34,382 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:45:36,691 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-02 11:45:36,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:36,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:38,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:38,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:45:38,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-02 11:45:38,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-02 11:45:38,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-02 11:45:38,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 11:45:38,442 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-10-02 11:45:41,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:41,355 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-02 11:45:41,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 11:45:41,355 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-02 11:45:41,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:41,356 INFO L225 Difference]: With dead ends: 117 [2018-10-02 11:45:41,357 INFO L226 Difference]: Without dead ends: 115 [2018-10-02 11:45:41,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 11:45:41,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-02 11:45:41,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-02 11:45:41,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-02 11:45:41,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-02 11:45:41,364 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-10-02 11:45:41,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:41,365 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-02 11:45:41,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-02 11:45:41,365 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-02 11:45:41,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-02 11:45:41,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:41,366 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-10-02 11:45:41,366 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:41,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:41,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-10-02 11:45:41,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:41,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:41,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:41,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:41,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:41,374 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:45:41,374 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:45:41,374 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:45:41,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:45:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:41,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:43,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:45:43,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-10-02 11:45:43,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-02 11:45:43,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-02 11:45:43,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:45:43,367 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-10-02 11:45:45,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:45,666 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-02 11:45:45,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-02 11:45:45,666 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-02 11:45:45,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:45,667 INFO L225 Difference]: With dead ends: 119 [2018-10-02 11:45:45,667 INFO L226 Difference]: Without dead ends: 117 [2018-10-02 11:45:45,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:45:45,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-02 11:45:45,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-02 11:45:45,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-02 11:45:45,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-10-02 11:45:45,675 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-10-02 11:45:45,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:45,675 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-10-02 11:45:45,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-02 11:45:45,675 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-10-02 11:45:45,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-02 11:45:45,676 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:45,676 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-10-02 11:45:45,676 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:45,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:45,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-10-02 11:45:45,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:45,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:45,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:45,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:45:45,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:45,685 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:45:45,685 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:45:45,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:45:45,697 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:45:45,830 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:45:45,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:45,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:49,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:45:49,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-02 11:45:49,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 11:45:49,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 11:45:49,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:45:49,278 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-10-02 11:45:51,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:51,651 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-02 11:45:51,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 11:45:51,651 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-02 11:45:51,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:51,652 INFO L225 Difference]: With dead ends: 121 [2018-10-02 11:45:51,652 INFO L226 Difference]: Without dead ends: 119 [2018-10-02 11:45:51,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:45:51,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-02 11:45:51,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-02 11:45:51,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-02 11:45:51,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-02 11:45:51,659 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-10-02 11:45:51,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:51,659 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-02 11:45:51,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 11:45:51,659 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-02 11:45:51,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-02 11:45:51,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:51,660 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-10-02 11:45:51,660 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:51,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:51,660 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-10-02 11:45:51,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:51,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:51,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:51,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:51,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:51,667 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:45:51,667 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:45:51,668 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:45:51,682 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:45:59,363 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-02 11:45:59,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:59,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:01,283 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:46:01,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-10-02 11:46:01,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-02 11:46:01,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-02 11:46:01,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:46:01,284 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-10-02 11:46:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:03,885 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-02 11:46:03,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-02 11:46:03,886 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-10-02 11:46:03,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:03,887 INFO L225 Difference]: With dead ends: 123 [2018-10-02 11:46:03,887 INFO L226 Difference]: Without dead ends: 121 [2018-10-02 11:46:03,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:46:03,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-02 11:46:03,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-02 11:46:03,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-02 11:46:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-10-02 11:46:03,896 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-10-02 11:46:03,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:03,896 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-10-02 11:46:03,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-02 11:46:03,896 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-10-02 11:46:03,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-02 11:46:03,897 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:03,897 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-10-02 11:46:03,897 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:03,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:03,897 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-10-02 11:46:03,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:03,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:03,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:03,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:46:03,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:03,905 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:46:03,905 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:46:03,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:46:03,919 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:46:04,065 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:46:04,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:46:04,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:05,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:05,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:46:05,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-02 11:46:05,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-02 11:46:05,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-02 11:46:05,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-10-02 11:46:05,980 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-10-02 11:46:08,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:08,626 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-02 11:46:08,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-02 11:46:08,626 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-10-02 11:46:08,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:08,627 INFO L225 Difference]: With dead ends: 125 [2018-10-02 11:46:08,627 INFO L226 Difference]: Without dead ends: 123 [2018-10-02 11:46:08,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-10-02 11:46:08,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-02 11:46:08,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-02 11:46:08,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-02 11:46:08,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-02 11:46:08,633 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-10-02 11:46:08,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:08,634 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-02 11:46:08,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-02 11:46:08,634 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-02 11:46:08,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-02 11:46:08,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:08,635 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-10-02 11:46:08,635 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:08,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:08,635 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-10-02 11:46:08,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:08,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:08,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:08,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:46:08,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:08,644 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:46:08,644 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:46:08,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:46:08,661 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:46:08,890 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-02 11:46:08,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:46:08,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:10,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:46:10,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-10-02 11:46:10,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-02 11:46:10,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-02 11:46:10,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:46:10,741 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-10-02 11:46:14,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:14,182 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-02 11:46:14,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-02 11:46:14,183 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-10-02 11:46:14,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:14,184 INFO L225 Difference]: With dead ends: 127 [2018-10-02 11:46:14,184 INFO L226 Difference]: Without dead ends: 125 [2018-10-02 11:46:14,185 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:46:14,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-02 11:46:14,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-02 11:46:14,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-02 11:46:14,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-02 11:46:14,190 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-10-02 11:46:14,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:14,190 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-02 11:46:14,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-02 11:46:14,191 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-02 11:46:14,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-02 11:46:14,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:14,191 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-10-02 11:46:14,191 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:14,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:14,192 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-10-02 11:46:14,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:14,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:14,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:14,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:46:14,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:14,198 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:46:14,198 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:46:14,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:46:14,206 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:46:15,728 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-02 11:46:15,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:46:15,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:17,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:46:17,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-02 11:46:17,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-02 11:46:17,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-02 11:46:17,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-10-02 11:46:17,753 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-10-02 11:46:20,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:20,499 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-02 11:46:20,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-02 11:46:20,500 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-10-02 11:46:20,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:20,501 INFO L225 Difference]: With dead ends: 129 [2018-10-02 11:46:20,501 INFO L226 Difference]: Without dead ends: 127 [2018-10-02 11:46:20,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-10-02 11:46:20,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-02 11:46:20,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-02 11:46:20,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-02 11:46:20,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-10-02 11:46:20,508 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-10-02 11:46:20,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:20,508 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-10-02 11:46:20,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-02 11:46:20,508 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-10-02 11:46:20,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-02 11:46:20,508 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:20,508 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-10-02 11:46:20,509 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:20,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:20,509 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-10-02 11:46:20,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:20,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:20,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:20,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:46:20,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:20,515 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:46:20,515 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:46:20,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:46:20,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:46:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:46:20,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:22,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:46:22,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-10-02 11:46:22,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-02 11:46:22,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-02 11:46:22,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:46:22,596 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-10-02 11:46:26,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:26,283 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-02 11:46:26,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-02 11:46:26,284 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-10-02 11:46:26,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:26,285 INFO L225 Difference]: With dead ends: 131 [2018-10-02 11:46:26,285 INFO L226 Difference]: Without dead ends: 129 [2018-10-02 11:46:26,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:46:26,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-02 11:46:26,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-02 11:46:26,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-02 11:46:26,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-10-02 11:46:26,291 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-10-02 11:46:26,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:26,291 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-10-02 11:46:26,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-02 11:46:26,291 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-10-02 11:46:26,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-02 11:46:26,292 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:26,292 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-10-02 11:46:26,292 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:26,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:26,292 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-10-02 11:46:26,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:26,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:26,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:26,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:46:26,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:26,299 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:46:26,299 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:46:26,299 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:46:26,310 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:46:26,470 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:46:26,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:46:26,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:28,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:46:28,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-02 11:46:28,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-02 11:46:28,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-02 11:46:28,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:46:28,694 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-10-02 11:46:32,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:32,389 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-02 11:46:32,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 11:46:32,390 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-10-02 11:46:32,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:32,391 INFO L225 Difference]: With dead ends: 133 [2018-10-02 11:46:32,391 INFO L226 Difference]: Without dead ends: 131 [2018-10-02 11:46:32,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:46:32,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-02 11:46:32,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-02 11:46:32,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-02 11:46:32,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-02 11:46:32,398 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-10-02 11:46:32,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:32,398 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-02 11:46:32,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-02 11:46:32,398 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-02 11:46:32,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-02 11:46:32,399 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:32,399 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-10-02 11:46:32,399 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:32,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:32,399 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-10-02 11:46:32,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:32,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:32,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:32,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:46:32,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:32,409 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:46:32,409 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:46:32,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-10-02 11:46:32,424 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:46:45,007 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-02 11:46:45,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:46:45,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:47,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:47,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:46:47,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-10-02 11:46:47,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-02 11:46:47,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-02 11:46:47,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:46:47,220 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-10-02 11:46:50,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:50,329 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-02 11:46:50,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-02 11:46:50,330 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-10-02 11:46:50,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:50,331 INFO L225 Difference]: With dead ends: 135 [2018-10-02 11:46:50,331 INFO L226 Difference]: Without dead ends: 133 [2018-10-02 11:46:50,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:46:50,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-02 11:46:50,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-02 11:46:50,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-02 11:46:50,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-10-02 11:46:50,339 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-10-02 11:46:50,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:50,340 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-10-02 11:46:50,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-02 11:46:50,340 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-10-02 11:46:50,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-02 11:46:50,340 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:50,341 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-10-02 11:46:50,341 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:50,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:50,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-10-02 11:46:50,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:50,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:50,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:50,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:46:50,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:50,350 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:46:50,350 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:46:50,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:46:50,365 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:46:50,566 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:46:50,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:46:50,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:52,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:46:52,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-02 11:46:52,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-02 11:46:52,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-02 11:46:52,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:46:52,741 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-10-02 11:46:56,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:56,405 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-02 11:46:56,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-02 11:46:56,405 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-10-02 11:46:56,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:56,406 INFO L225 Difference]: With dead ends: 137 [2018-10-02 11:46:56,406 INFO L226 Difference]: Without dead ends: 135 [2018-10-02 11:46:56,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:46:56,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-02 11:46:56,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-02 11:46:56,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-02 11:46:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-10-02 11:46:56,413 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-10-02 11:46:56,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:56,413 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-10-02 11:46:56,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-02 11:46:56,413 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-10-02 11:46:56,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-02 11:46:56,414 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:56,414 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-10-02 11:46:56,414 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:56,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:56,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-10-02 11:46:56,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:56,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:56,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:56,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:46:56,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:56,423 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:46:56,423 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:46:56,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:46:56,438 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:46:56,757 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-02 11:46:56,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:46:56,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:59,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:46:59,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-10-02 11:46:59,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-02 11:46:59,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-02 11:46:59,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:46:59,207 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-10-02 11:47:02,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:02,354 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-02 11:47:02,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-02 11:47:02,355 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-10-02 11:47:02,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:02,356 INFO L225 Difference]: With dead ends: 139 [2018-10-02 11:47:02,356 INFO L226 Difference]: Without dead ends: 137 [2018-10-02 11:47:02,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:47:02,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-02 11:47:02,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-02 11:47:02,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-02 11:47:02,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-10-02 11:47:02,365 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-10-02 11:47:02,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:02,365 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-10-02 11:47:02,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-02 11:47:02,365 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-10-02 11:47:02,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-02 11:47:02,366 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:02,366 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-10-02 11:47:02,366 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:02,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:02,366 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-10-02 11:47:02,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:02,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:02,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:02,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:47:02,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:02,373 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:47:02,373 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:47:02,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:47:02,383 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:47:03,750 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-02 11:47:03,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:47:03,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:47:06,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:47:06,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:47:06,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-02 11:47:06,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-02 11:47:06,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-02 11:47:06,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-10-02 11:47:06,113 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-10-02 11:47:09,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:09,531 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-02 11:47:09,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-02 11:47:09,532 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-10-02 11:47:09,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:09,533 INFO L225 Difference]: With dead ends: 141 [2018-10-02 11:47:09,533 INFO L226 Difference]: Without dead ends: 139 [2018-10-02 11:47:09,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-10-02 11:47:09,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-02 11:47:09,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-02 11:47:09,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-02 11:47:09,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-10-02 11:47:09,542 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-10-02 11:47:09,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:09,542 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-10-02 11:47:09,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-02 11:47:09,542 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-10-02 11:47:09,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-02 11:47:09,543 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:09,543 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-10-02 11:47:09,543 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:09,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:09,543 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-10-02 11:47:09,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:09,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:09,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:09,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:47:09,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:09,552 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:47:09,552 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:47:09,552 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:47:09,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:47:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:09,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:47:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:47:12,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:47:12,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-10-02 11:47:12,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-02 11:47:12,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-02 11:47:12,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:47:12,084 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-10-02 11:47:15,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:15,649 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-02 11:47:15,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-02 11:47:15,649 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-10-02 11:47:15,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:15,651 INFO L225 Difference]: With dead ends: 143 [2018-10-02 11:47:15,651 INFO L226 Difference]: Without dead ends: 141 [2018-10-02 11:47:15,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:47:15,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-02 11:47:15,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-02 11:47:15,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-02 11:47:15,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-10-02 11:47:15,657 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-10-02 11:47:15,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:15,657 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-10-02 11:47:15,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-02 11:47:15,658 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-10-02 11:47:15,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-02 11:47:15,658 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:15,658 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-10-02 11:47:15,658 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:15,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:15,659 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-10-02 11:47:15,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:15,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:15,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:15,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:47:15,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:15,668 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:47:15,668 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:47:15,668 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:47:15,675 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:47:15,902 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:47:15,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:47:15,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:47:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:47:18,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:47:18,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-10-02 11:47:18,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-02 11:47:18,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-02 11:47:18,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:47:18,271 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-10-02 11:47:22,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:22,603 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-02 11:47:22,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-02 11:47:22,604 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-10-02 11:47:22,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:22,605 INFO L225 Difference]: With dead ends: 145 [2018-10-02 11:47:22,605 INFO L226 Difference]: Without dead ends: 143 [2018-10-02 11:47:22,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:47:22,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-02 11:47:22,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-02 11:47:22,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-02 11:47:22,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-02 11:47:22,612 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-10-02 11:47:22,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:22,612 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-02 11:47:22,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-02 11:47:22,613 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-02 11:47:22,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-02 11:47:22,613 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:22,613 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-10-02 11:47:22,613 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:22,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:22,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-10-02 11:47:22,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:22,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:22,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:22,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:47:22,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:22,622 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:47:22,622 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:47:22,622 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:47:22,637 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:47:42,587 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-02 11:47:42,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:47:42,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:47:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:47:45,264 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:47:45,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-10-02 11:47:45,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-02 11:47:45,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-02 11:47:45,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:47:45,266 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-10-02 11:47:49,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:49,578 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-02 11:47:49,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-02 11:47:49,578 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-10-02 11:47:49,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:49,580 INFO L225 Difference]: With dead ends: 147 [2018-10-02 11:47:49,580 INFO L226 Difference]: Without dead ends: 145 [2018-10-02 11:47:49,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:47:49,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-02 11:47:49,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-02 11:47:49,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-02 11:47:49,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-10-02 11:47:49,586 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-10-02 11:47:49,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:49,586 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-10-02 11:47:49,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-02 11:47:49,587 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-10-02 11:47:49,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-02 11:47:49,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:49,587 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-10-02 11:47:49,587 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:49,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:49,588 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-10-02 11:47:49,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:49,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:49,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:49,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:47:49,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:49,596 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:47:49,596 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:47:49,596 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:47:49,605 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:47:49,852 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:47:49,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:47:49,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:47:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:47:52,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:47:52,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-02 11:47:52,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-02 11:47:52,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-02 11:47:52,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-10-02 11:47:52,455 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-10-02 11:47:57,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:57,013 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-02 11:47:57,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-02 11:47:57,014 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-10-02 11:47:57,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:57,015 INFO L225 Difference]: With dead ends: 149 [2018-10-02 11:47:57,015 INFO L226 Difference]: Without dead ends: 147 [2018-10-02 11:47:57,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-10-02 11:47:57,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-02 11:47:57,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-02 11:47:57,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-02 11:47:57,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-02 11:47:57,022 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-10-02 11:47:57,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:57,022 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-02 11:47:57,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-02 11:47:57,023 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-02 11:47:57,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-02 11:47:57,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:57,024 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-10-02 11:47:57,024 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:57,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:57,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-10-02 11:47:57,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:57,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:57,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:57,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:47:57,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:57,032 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:47:57,032 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:47:57,033 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:47:57,047 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:47:57,434 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-02 11:47:57,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:47:57,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-02 11:47:59,405 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-02 11:47:59,606 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:47:59,606 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 11:47:59,612 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 11:47:59,612 INFO L202 PluginConnector]: Adding new model gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 11:47:59 BoogieIcfgContainer [2018-10-02 11:47:59,612 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 11:47:59,613 INFO L168 Benchmark]: Toolchain (without parser) took 253974.26 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 40.4 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 436.6 MB). Peak memory consumption was 476.9 MB. Max. memory is 7.1 GB. [2018-10-02 11:47:59,615 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:47:59,615 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:47:59,615 INFO L168 Benchmark]: Boogie Preprocessor took 25.50 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:47:59,616 INFO L168 Benchmark]: RCFGBuilder took 317.87 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-02 11:47:59,616 INFO L168 Benchmark]: TraceAbstraction took 253580.15 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 40.4 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 415.4 MB). Peak memory consumption was 455.8 MB. Max. memory is 7.1 GB. [2018-10-02 11:47:59,619 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.50 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 317.87 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 253580.15 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 40.4 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 415.4 MB). Peak memory consumption was 455.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 45). Cancelled while BasicCegarLoop was analyzing trace of length 147 with TraceHistMax 72, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 66 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 253.4s OverallTime, 72 OverallIterations, 72 TraceHistogramMax, 102.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2769 SDtfs, 0 SDslu, 121837 SDs, 0 SdLazy, 126948 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 85.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5183 GetRequests, 2627 SyntacticMatches, 0 SemanticMatches, 2556 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 79.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=147occurred in iteration=71, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 71 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 62.5s SatisfiabilityAnalysisTime, 81.7s InterpolantComputationTime, 5254 NumberOfCodeBlocks, 5254 NumberOfCodeBlocksAsserted, 1308 NumberOfCheckSat, 5183 ConstructedInterpolants, 0 QuantifiedInterpolants, 3486765 SizeOfPredicates, 352 NumberOfNonLiveVariables, 16259 ConjunctsInSsa, 10713 ConjunctsInUnsatCore, 71 InterpolantComputations, 1 PerfectInterpolantSequences, 0/119280 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/gauss_sum.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_11-47-59-631.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/gauss_sum.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_11-47-59-631.csv Completed graceful shutdown