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/toy/nonlinear/Mult1-Safe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4eac566 [2018-09-23 19:53:41,208 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:53:41,210 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:53:41,228 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 19:53:41,228 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 19:53:41,229 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 19:53:41,230 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 19:53:41,232 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 19:53:41,234 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 19:53:41,235 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 19:53:41,235 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-23 19:53:41,260 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 19:53:41,279 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:53:41,279 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:53:41,280 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:53:41,280 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:53:41,281 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:53:41,281 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:53:41,281 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:53:41,281 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:53:41,285 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:53:41,285 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:53:41,285 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:53:41,286 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:53:41,286 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:53:41,286 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:53:41,286 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:53:41,286 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:53:41,287 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:53:41,287 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:53:41,287 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:53:41,287 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:53:41,287 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:53:41,288 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:53:41,288 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:53:41,288 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:53:41,288 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:53:41,288 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:53:41,289 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:53:41,289 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:53:41,289 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:53:41,289 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:53:41,333 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:53:41,353 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:53:41,360 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:53:41,362 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:53:41,363 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:53:41,363 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl [2018-09-23 19:53:41,364 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl' [2018-09-23 19:53:41,410 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:53:41,413 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:53:41,414 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:53:41,414 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:53:41,415 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:53:41,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:53:41" (1/1) ... [2018-09-23 19:53:41,449 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:53:41" (1/1) ... [2018-09-23 19:53:41,453 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-23 19:53:41,454 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-23 19:53:41,454 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-23 19:53:41,456 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:53:41,457 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:53:41,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:53:41,457 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:53:41,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:53:41" (1/1) ... [2018-09-23 19:53:41,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:53:41" (1/1) ... [2018-09-23 19:53:41,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:53:41" (1/1) ... [2018-09-23 19:53:41,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:53:41" (1/1) ... [2018-09-23 19:53:41,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:53:41" (1/1) ... [2018-09-23 19:53:41,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:53:41" (1/1) ... [2018-09-23 19:53:41,477 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:53:41" (1/1) ... [2018-09-23 19:53:41,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:53:41,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:53:41,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:53:41,479 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:53:41,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:53:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:53:41,567 INFO L124 BoogieDeclarations]: Specification and implementation of procedure mult given in one single declaration [2018-09-23 19:53:41,567 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2018-09-23 19:53:41,567 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2018-09-23 19:53:41,629 WARN L614 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-09-23 19:53:41,769 INFO L351 CfgBuilder]: Using library mode [2018-09-23 19:53:41,770 INFO L202 PluginConnector]: Adding new model Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:53:41 BoogieIcfgContainer [2018-09-23 19:53:41,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:53:41,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:53:41,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:53:41,775 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:53:41,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:53:41" (1/2) ... [2018-09-23 19:53:41,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13cb56d6 and model type Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:53:41, skipping insertion in model container [2018-09-23 19:53:41,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:53:41" (2/2) ... [2018-09-23 19:53:41,778 INFO L112 eAbstractionObserver]: Analyzing ICFG Mult1-Safe.bpl [2018-09-23 19:53:41,790 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:53:41,799 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 19:53:41,848 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:53:41,849 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:53:41,849 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:53:41,849 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:53:41,849 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:53:41,849 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:53:41,850 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:53:41,850 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:53:41,850 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:53:41,866 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-23 19:53:41,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 19:53:41,882 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:41,884 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-23 19:53:41,885 INFO L423 AbstractCegarLoop]: === Iteration 1 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:53:41,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:41,896 INFO L82 PathProgramCache]: Analyzing trace with hash 924708, now seen corresponding path program 1 times [2018-09-23 19:53:41,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:41,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:41,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:41,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:41,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:41,986 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:53:41,986 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:53:41,987 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) [2018-09-23 19:53:42,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-23 19:53:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:42,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:42,315 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:53:42,315 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-23 19:53:42,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:53:42,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:53:42,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:53:42,334 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 5 states. [2018-09-23 19:53:42,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:42,473 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-23 19:53:42,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:53:42,476 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-23 19:53:42,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:42,488 INFO L225 Difference]: With dead ends: 10 [2018-09-23 19:53:42,489 INFO L226 Difference]: Without dead ends: 6 [2018-09-23 19:53:42,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:53:42,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-23 19:53:42,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-23 19:53:42,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-23 19:53:42,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-23 19:53:42,526 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-23 19:53:42,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:42,526 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-23 19:53:42,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:53:42,526 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-23 19:53:42,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 19:53:42,527 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:42,527 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-23 19:53:42,527 INFO L423 AbstractCegarLoop]: === Iteration 2 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:53:42,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:42,528 INFO L82 PathProgramCache]: Analyzing trace with hash 28663973, now seen corresponding path program 1 times [2018-09-23 19:53:42,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:42,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:42,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:42,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:42,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:42,534 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:53:42,534 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:53:42,534 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 [2018-09-23 19:53:42,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:42,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:42,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:53:42,657 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-09-23 19:53:42,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:53:42,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:53:42,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:53:42,659 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-23 19:53:42,927 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-23 19:53:42,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:42,981 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-23 19:53:42,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:53:42,982 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-23 19:53:42,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:42,983 INFO L225 Difference]: With dead ends: 9 [2018-09-23 19:53:42,983 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 19:53:42,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:53:42,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 19:53:42,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 19:53:42,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 19:53:42,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-23 19:53:42,987 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-23 19:53:42,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:42,988 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-23 19:53:42,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:53:42,988 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-23 19:53:42,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 19:53:42,989 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:42,989 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-23 19:53:42,990 INFO L423 AbstractCegarLoop]: === Iteration 3 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:53:42,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:42,990 INFO L82 PathProgramCache]: Analyzing trace with hash 888581188, now seen corresponding path program 2 times [2018-09-23 19:53:42,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:42,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:42,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:42,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:42,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:42,999 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:53:43,000 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:53:43,000 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 [2018-09-23 19:53:43,018 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:43,034 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:43,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:43,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:43,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:43,223 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:53:43,223 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-09-23 19:53:43,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:53:43,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:53:43,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:53:43,224 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-23 19:53:43,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:43,288 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-23 19:53:43,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:53:43,292 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-23 19:53:43,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:43,293 INFO L225 Difference]: With dead ends: 10 [2018-09-23 19:53:43,293 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 19:53:43,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:53:43,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 19:53:43,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 19:53:43,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 19:53:43,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-23 19:53:43,298 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-23 19:53:43,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:43,298 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-23 19:53:43,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:53:43,299 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-23 19:53:43,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 19:53:43,299 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:43,300 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2018-09-23 19:53:43,300 INFO L423 AbstractCegarLoop]: === Iteration 4 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:53:43,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:43,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1776211077, now seen corresponding path program 3 times [2018-09-23 19:53:43,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:43,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:43,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:43,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:43,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:43,309 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:53:43,312 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:53:43,312 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 [2018-09-23 19:53:43,322 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:43,332 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 19:53:43,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:43,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:43,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:53:43,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-09-23 19:53:43,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:53:43,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:53:43,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:53:43,556 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-23 19:53:43,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:43,646 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 19:53:43,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:53:43,647 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-23 19:53:43,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:43,647 INFO L225 Difference]: With dead ends: 11 [2018-09-23 19:53:43,648 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 19:53:43,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:53:43,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 19:53:43,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 19:53:43,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 19:53:43,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-23 19:53:43,652 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-23 19:53:43,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:43,653 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-23 19:53:43,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:53:43,653 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-23 19:53:43,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:53:43,653 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:43,654 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2018-09-23 19:53:43,654 INFO L423 AbstractCegarLoop]: === Iteration 5 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:53:43,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:43,654 INFO L82 PathProgramCache]: Analyzing trace with hash -772033436, now seen corresponding path program 4 times [2018-09-23 19:53:43,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:43,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:43,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:43,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:43,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:43,664 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:53:43,664 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:53:43,664 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 [2018-09-23 19:53:43,677 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:43,688 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:43,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:43,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:44,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:53:44,164 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-09-23 19:53:44,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:53:44,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:53:44,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:53:44,165 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-23 19:53:44,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:44,298 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-23 19:53:44,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:53:44,298 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-23 19:53:44,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:44,299 INFO L225 Difference]: With dead ends: 12 [2018-09-23 19:53:44,299 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 19:53:44,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:53:44,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 19:53:44,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-23 19:53:44,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 19:53:44,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-23 19:53:44,304 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-23 19:53:44,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:44,305 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-23 19:53:44,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:53:44,305 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-23 19:53:44,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 19:53:44,306 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:44,306 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1] [2018-09-23 19:53:44,306 INFO L423 AbstractCegarLoop]: === Iteration 6 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:53:44,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:44,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1836765285, now seen corresponding path program 5 times [2018-09-23 19:53:44,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:44,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:44,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:44,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:44,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:44,316 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:53:44,316 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:53:44,316 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 [2018-09-23 19:53:44,328 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:44,340 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-23 19:53:44,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:44,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:44,491 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:53:44,491 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-09-23 19:53:44,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:53:44,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:53:44,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:53:44,492 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-23 19:53:44,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:44,581 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-23 19:53:44,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:53:44,582 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-23 19:53:44,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:44,583 INFO L225 Difference]: With dead ends: 13 [2018-09-23 19:53:44,583 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 19:53:44,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:53:44,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 19:53:44,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 19:53:44,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 19:53:44,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-23 19:53:44,588 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-23 19:53:44,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:44,588 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-23 19:53:44,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:53:44,589 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-23 19:53:44,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:53:44,589 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:44,589 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2018-09-23 19:53:44,590 INFO L423 AbstractCegarLoop]: === Iteration 7 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:53:44,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:44,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1105147012, now seen corresponding path program 6 times [2018-09-23 19:53:44,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:44,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:44,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:44,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:44,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:44,601 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:53:44,601 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:53:44,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:44,621 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:44,637 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-23 19:53:44,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:44,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:44,846 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:53:44,846 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-09-23 19:53:44,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:53:44,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:53:44,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:53:44,847 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-23 19:53:45,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:45,005 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-23 19:53:45,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:53:45,005 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-23 19:53:45,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:45,007 INFO L225 Difference]: With dead ends: 14 [2018-09-23 19:53:45,007 INFO L226 Difference]: Without dead ends: 12 [2018-09-23 19:53:45,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:45,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-23 19:53:45,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-23 19:53:45,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 19:53:45,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-23 19:53:45,012 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-23 19:53:45,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:45,012 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-23 19:53:45,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:53:45,013 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-23 19:53:45,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:53:45,013 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:45,013 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1] [2018-09-23 19:53:45,014 INFO L423 AbstractCegarLoop]: === Iteration 8 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:53:45,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:45,014 INFO L82 PathProgramCache]: Analyzing trace with hash -100182971, now seen corresponding path program 7 times [2018-09-23 19:53:45,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:45,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:45,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:45,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:45,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:45,039 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:53:45,039 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:53:45,039 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 [2018-09-23 19:53:45,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:45,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:45,278 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:53:45,278 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-09-23 19:53:45,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:45,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:45,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:45,280 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-23 19:53:45,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:45,406 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-23 19:53:45,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:45,406 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-23 19:53:45,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:45,408 INFO L225 Difference]: With dead ends: 15 [2018-09-23 19:53:45,408 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 19:53:45,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:53:45,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 19:53:45,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 19:53:45,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 19:53:45,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-23 19:53:45,413 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-23 19:53:45,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:45,414 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-23 19:53:45,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:45,414 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-23 19:53:45,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 19:53:45,414 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:45,415 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2018-09-23 19:53:45,415 INFO L423 AbstractCegarLoop]: === Iteration 9 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:53:45,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:45,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1189293220, now seen corresponding path program 8 times [2018-09-23 19:53:45,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:45,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:45,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:45,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:45,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:45,427 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:53:45,427 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:53:45,427 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 [2018-09-23 19:53:45,442 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:45,463 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:45,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:45,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:45,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:53:45,646 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-09-23 19:53:45,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:53:45,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:53:45,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:53:45,647 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-23 19:53:45,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:45,784 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-23 19:53:45,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:53:45,784 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-23 19:53:45,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:45,785 INFO L225 Difference]: With dead ends: 16 [2018-09-23 19:53:45,786 INFO L226 Difference]: Without dead ends: 14 [2018-09-23 19:53:45,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:53:45,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-23 19:53:45,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-23 19:53:45,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 19:53:45,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-23 19:53:45,791 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-23 19:53:45,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:45,791 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-23 19:53:45,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:53:45,792 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-23 19:53:45,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:53:45,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:45,793 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1] [2018-09-23 19:53:45,793 INFO L423 AbstractCegarLoop]: === Iteration 10 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:53:45,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:45,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1786617819, now seen corresponding path program 9 times [2018-09-23 19:53:45,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:45,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:45,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:45,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:45,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:45,804 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:53:45,804 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:53:45,805 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 [2018-09-23 19:53:45,815 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:45,837 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 19:53:45,838 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:45,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:46,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:53:46,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-09-23 19:53:46,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:53:46,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:53:46,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:53:46,100 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-23 19:53:46,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:46,272 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-23 19:53:46,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:53:46,273 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-23 19:53:46,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:46,274 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:53:46,274 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 19:53:46,275 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:53:46,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 19:53:46,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-23 19:53:46,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 19:53:46,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-23 19:53:46,280 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-23 19:53:46,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:46,281 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-23 19:53:46,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:53:46,281 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-23 19:53:46,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:53:46,282 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:46,282 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2018-09-23 19:53:46,282 INFO L423 AbstractCegarLoop]: === Iteration 11 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:53:46,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:46,283 INFO L82 PathProgramCache]: Analyzing trace with hash 449420484, now seen corresponding path program 10 times [2018-09-23 19:53:46,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:46,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:46,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:46,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:46,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:46,293 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:53:46,293 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:53:46,294 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 [2018-09-23 19:53:46,305 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:46,332 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:46,332 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:46,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:46,712 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:53:46,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-09-23 19:53:46,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:53:46,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:53:46,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:53:46,714 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-23 19:53:47,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:47,106 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-23 19:53:47,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:53:47,107 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-23 19:53:47,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:47,108 INFO L225 Difference]: With dead ends: 18 [2018-09-23 19:53:47,108 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 19:53:47,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:53:47,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 19:53:47,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-23 19:53:47,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 19:53:47,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-23 19:53:47,114 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-23 19:53:47,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:47,115 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-23 19:53:47,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:53:47,115 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-23 19:53:47,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:53:47,116 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:47,116 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1] [2018-09-23 19:53:47,116 INFO L423 AbstractCegarLoop]: === Iteration 12 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:53:47,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:47,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1047131141, now seen corresponding path program 11 times [2018-09-23 19:53:47,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:47,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:47,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:47,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:47,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:47,127 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:53:47,128 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:53:47,128 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 [2018-09-23 19:53:47,138 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:47,172 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 19:53:47,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:47,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:47,552 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:53:47,553 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-09-23 19:53:47,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:53:47,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:53:47,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:53:47,554 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-23 19:53:47,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:47,781 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-23 19:53:47,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:53:47,782 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-23 19:53:47,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:47,783 INFO L225 Difference]: With dead ends: 19 [2018-09-23 19:53:47,783 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 19:53:47,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:53:47,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 19:53:47,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-23 19:53:47,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-23 19:53:47,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-23 19:53:47,789 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-23 19:53:47,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:47,789 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-23 19:53:47,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:53:47,789 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-23 19:53:47,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 19:53:47,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:47,790 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1] [2018-09-23 19:53:47,790 INFO L423 AbstractCegarLoop]: === Iteration 13 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:53:47,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:47,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1898674972, now seen corresponding path program 12 times [2018-09-23 19:53:47,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:47,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:47,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:47,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:47,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:47,801 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:53:47,801 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:53:47,801 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 [2018-09-23 19:53:47,814 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:47,851 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:53:47,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:47,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:48,267 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:53:48,267 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-09-23 19:53:48,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:53:48,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:53:48,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:53:48,269 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-23 19:53:48,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:48,725 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-23 19:53:48,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:53:48,726 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-23 19:53:48,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:48,726 INFO L225 Difference]: With dead ends: 20 [2018-09-23 19:53:48,727 INFO L226 Difference]: Without dead ends: 18 [2018-09-23 19:53:48,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:53:48,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-23 19:53:48,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-23 19:53:48,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 19:53:48,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-23 19:53:48,732 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-23 19:53:48,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:48,732 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-23 19:53:48,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:53:48,732 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-23 19:53:48,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:53:48,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:48,733 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1] [2018-09-23 19:53:48,733 INFO L423 AbstractCegarLoop]: === Iteration 14 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:53:48,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:48,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1270616037, now seen corresponding path program 13 times [2018-09-23 19:53:48,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:48,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:48,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:48,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:48,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:48,745 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:53:48,745 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:53:48,745 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 [2018-09-23 19:53:48,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:48,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:48,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:49,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:53:49,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-09-23 19:53:49,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:53:49,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:53:49,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:53:49,115 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-23 19:53:49,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:49,637 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-23 19:53:49,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:53:49,637 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-23 19:53:49,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:49,638 INFO L225 Difference]: With dead ends: 21 [2018-09-23 19:53:49,638 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 19:53:49,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:53:49,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 19:53:49,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 19:53:49,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 19:53:49,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-23 19:53:49,645 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-23 19:53:49,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:49,645 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-23 19:53:49,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:53:49,645 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-23 19:53:49,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:53:49,646 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:49,646 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1] [2018-09-23 19:53:49,646 INFO L423 AbstractCegarLoop]: === Iteration 15 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:53:49,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:49,647 INFO L82 PathProgramCache]: Analyzing trace with hash 734389508, now seen corresponding path program 14 times [2018-09-23 19:53:49,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:49,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:49,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:49,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:49,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:49,657 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:53:49,658 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:53:49,658 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 [2018-09-23 19:53:49,673 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:49,730 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:49,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:49,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:49,984 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:50,006 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:53:50,006 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-09-23 19:53:50,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:53:50,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:53:50,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:53:50,007 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-23 19:53:50,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:50,353 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-23 19:53:50,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:53:50,354 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-23 19:53:50,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:50,355 INFO L225 Difference]: With dead ends: 22 [2018-09-23 19:53:50,355 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 19:53:50,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:53:50,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 19:53:50,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-23 19:53:50,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:53:50,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-23 19:53:50,361 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-23 19:53:50,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:50,361 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-23 19:53:50,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:53:50,361 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-23 19:53:50,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:50,362 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:50,362 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1] [2018-09-23 19:53:50,362 INFO L423 AbstractCegarLoop]: === Iteration 16 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:53:50,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:50,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1291236293, now seen corresponding path program 15 times [2018-09-23 19:53:50,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:50,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:50,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:50,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:50,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:50,373 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:53:50,373 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:53:50,374 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:50,396 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:50,500 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:53:50,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:50,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:52,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:53:52,286 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-09-23 19:53:52,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:53:52,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:53:52,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:53:52,287 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-23 19:53:52,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:52,775 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-23 19:53:52,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:53:52,775 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-23 19:53:52,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:52,776 INFO L225 Difference]: With dead ends: 23 [2018-09-23 19:53:52,776 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 19:53:52,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:53:52,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 19:53:52,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 19:53:52,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 19:53:52,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-23 19:53:52,782 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-23 19:53:52,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:52,783 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-23 19:53:52,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:53:52,783 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-23 19:53:52,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 19:53:52,784 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:52,784 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1] [2018-09-23 19:53:52,784 INFO L423 AbstractCegarLoop]: === Iteration 17 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:53:52,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:52,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1373617444, now seen corresponding path program 16 times [2018-09-23 19:53:52,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:52,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:52,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:52,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:52,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:52,794 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:53:52,794 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:53:52,794 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 [2018-09-23 19:53:52,813 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:52,890 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:52,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:52,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:53,217 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:53:53,217 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-09-23 19:53:53,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:53:53,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:53:53,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:53:53,218 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-23 19:53:53,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:53,589 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-23 19:53:53,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:53:53,589 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-23 19:53:53,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:53,590 INFO L225 Difference]: With dead ends: 24 [2018-09-23 19:53:53,590 INFO L226 Difference]: Without dead ends: 22 [2018-09-23 19:53:53,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:53:53,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-23 19:53:53,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-23 19:53:53,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:53:53,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-23 19:53:53,596 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-23 19:53:53,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:53,597 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-23 19:53:53,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:53:53,597 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-23 19:53:53,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:53:53,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:53,598 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1] [2018-09-23 19:53:53,598 INFO L423 AbstractCegarLoop]: === Iteration 18 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:53:53,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:53,598 INFO L82 PathProgramCache]: Analyzing trace with hash -367534171, now seen corresponding path program 17 times [2018-09-23 19:53:53,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:53,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:53,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:53,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:53,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:53,609 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:53:53,609 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:53:53,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:53,626 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:53,724 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-23 19:53:53,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:53,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:54,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:53:54,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-09-23 19:53:54,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:53:54,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:53:54,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:53:54,181 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-23 19:53:54,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:54,638 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-23 19:53:54,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:53:54,639 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-23 19:53:54,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:54,640 INFO L225 Difference]: With dead ends: 25 [2018-09-23 19:53:54,640 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:53:54,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:53:54,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:53:54,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 19:53:54,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 19:53:54,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-23 19:53:54,647 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-23 19:53:54,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:54,648 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-23 19:53:54,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:53:54,648 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-23 19:53:54,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 19:53:54,649 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:54,649 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1] [2018-09-23 19:53:54,649 INFO L423 AbstractCegarLoop]: === Iteration 19 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:53:54,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:54,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1491340612, now seen corresponding path program 18 times [2018-09-23 19:53:54,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:54,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:54,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:54,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:54,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:54,661 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:53:54,661 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:53:54,661 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 [2018-09-23 19:53:54,680 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:54,809 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-23 19:53:54,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:54,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:55,218 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:55,239 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:53:55,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-09-23 19:53:55,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:53:55,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:53:55,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:53:55,240 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-23 19:53:55,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:55,634 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-23 19:53:55,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 19:53:55,634 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-23 19:53:55,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:55,635 INFO L225 Difference]: With dead ends: 26 [2018-09-23 19:53:55,635 INFO L226 Difference]: Without dead ends: 24 [2018-09-23 19:53:55,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:53:55,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-23 19:53:55,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-23 19:53:55,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:53:55,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-23 19:53:55,642 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-23 19:53:55,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:55,643 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-23 19:53:55,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:53:55,643 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-23 19:53:55,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 19:53:55,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:55,644 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1] [2018-09-23 19:53:55,644 INFO L423 AbstractCegarLoop]: === Iteration 20 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:53:55,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:55,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1013083259, now seen corresponding path program 19 times [2018-09-23 19:53:55,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:55,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:55,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:55,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:55,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:55,654 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:53:55,654 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:53:55,654 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 [2018-09-23 19:53:55,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:55,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:56,544 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:53:56,544 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-09-23 19:53:56,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 19:53:56,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 19:53:56,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:53:56,545 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-23 19:53:57,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:57,236 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-23 19:53:57,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:53:57,237 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-23 19:53:57,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:57,237 INFO L225 Difference]: With dead ends: 27 [2018-09-23 19:53:57,237 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 19:53:57,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:53:57,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 19:53:57,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 19:53:57,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 19:53:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-23 19:53:57,244 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-23 19:53:57,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:57,244 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-23 19:53:57,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 19:53:57,244 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-23 19:53:57,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 19:53:57,245 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:57,245 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1] [2018-09-23 19:53:57,245 INFO L423 AbstractCegarLoop]: === Iteration 21 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:53:57,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:57,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1340811932, now seen corresponding path program 20 times [2018-09-23 19:53:57,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:57,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:57,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:57,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:57,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:57,255 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:53:57,255 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:53:57,255 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 [2018-09-23 19:53:57,273 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:57,429 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:57,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:57,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:57,912 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:53:57,912 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-09-23 19:53:57,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:53:57,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:53:57,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:53:57,913 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-23 19:53:58,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:58,393 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-23 19:53:58,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:53:58,394 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-23 19:53:58,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:58,394 INFO L225 Difference]: With dead ends: 28 [2018-09-23 19:53:58,394 INFO L226 Difference]: Without dead ends: 26 [2018-09-23 19:53:58,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:53:58,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-23 19:53:58,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-23 19:53:58,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:53:58,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-23 19:53:58,401 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-23 19:53:58,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:58,401 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-23 19:53:58,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 19:53:58,401 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-23 19:53:58,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 19:53:58,402 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:58,402 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1] [2018-09-23 19:53:58,403 INFO L423 AbstractCegarLoop]: === Iteration 22 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:53:58,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:58,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1384501093, now seen corresponding path program 21 times [2018-09-23 19:53:58,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:58,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:58,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:58,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:58,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:58,411 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:53:58,411 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:53:58,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:58,428 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:58,604 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-23 19:53:58,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:58,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:59,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:53:59,370 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-09-23 19:53:59,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 19:53:59,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 19:53:59,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:53:59,371 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-23 19:54:00,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:00,102 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-23 19:54:00,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:54:00,105 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-23 19:54:00,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:00,105 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:54:00,105 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:54:00,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:54:00,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:54:00,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 19:54:00,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 19:54:00,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-23 19:54:00,110 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-23 19:54:00,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:00,110 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-23 19:54:00,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 19:54:00,110 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-23 19:54:00,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 19:54:00,111 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:00,111 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2018-09-23 19:54:00,111 INFO L423 AbstractCegarLoop]: === Iteration 23 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:54:00,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:00,112 INFO L82 PathProgramCache]: Analyzing trace with hash -30141052, now seen corresponding path program 22 times [2018-09-23 19:54:00,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:00,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:00,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:00,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:00,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:00,120 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:54:00,120 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:54:00,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:54:00,134 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:54:00,329 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:54:00,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:00,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:00,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:54:00,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-09-23 19:54:00,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 19:54:00,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 19:54:00,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:54:00,856 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-23 19:54:01,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:01,500 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-23 19:54:01,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:54:01,501 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-23 19:54:01,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:01,502 INFO L225 Difference]: With dead ends: 30 [2018-09-23 19:54:01,502 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 19:54:01,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:54:01,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 19:54:01,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-23 19:54:01,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:54:01,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-23 19:54:01,508 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-23 19:54:01,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:01,508 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-23 19:54:01,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 19:54:01,508 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-23 19:54:01,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-23 19:54:01,509 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:01,509 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1] [2018-09-23 19:54:01,509 INFO L423 AbstractCegarLoop]: === Iteration 24 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:54:01,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:01,510 INFO L82 PathProgramCache]: Analyzing trace with hash -934374587, now seen corresponding path program 23 times [2018-09-23 19:54:01,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:01,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:01,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:01,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:01,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:01,518 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:54:01,518 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:54:01,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:54:01,541 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:54:01,795 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-23 19:54:01,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:01,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:02,576 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:54:02,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-09-23 19:54:02,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 19:54:02,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 19:54:02,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:54:02,577 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-23 19:54:03,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:03,162 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-23 19:54:03,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:54:03,162 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-23 19:54:03,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:03,163 INFO L225 Difference]: With dead ends: 31 [2018-09-23 19:54:03,163 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:54:03,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:54:03,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:54:03,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 19:54:03,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 19:54:03,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-23 19:54:03,169 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-23 19:54:03,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:03,169 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-23 19:54:03,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 19:54:03,169 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-23 19:54:03,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 19:54:03,170 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:03,170 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1] [2018-09-23 19:54:03,170 INFO L423 AbstractCegarLoop]: === Iteration 25 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:54:03,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:03,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1099156900, now seen corresponding path program 24 times [2018-09-23 19:54:03,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:03,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:03,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:03,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:03,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:03,180 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:54:03,180 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:54:03,180 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:54:03,192 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:54:03,458 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 19:54:03,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:03,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:04,375 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:54:04,376 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-09-23 19:54:04,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 19:54:04,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 19:54:04,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:54:04,377 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-23 19:54:05,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:05,036 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-23 19:54:05,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 19:54:05,036 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-23 19:54:05,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:05,037 INFO L225 Difference]: With dead ends: 32 [2018-09-23 19:54:05,037 INFO L226 Difference]: Without dead ends: 30 [2018-09-23 19:54:05,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:54:05,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-23 19:54:05,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-23 19:54:05,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:54:05,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-23 19:54:05,043 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-23 19:54:05,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:05,044 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-23 19:54:05,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 19:54:05,044 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-23 19:54:05,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 19:54:05,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:05,044 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1] [2018-09-23 19:54:05,045 INFO L423 AbstractCegarLoop]: === Iteration 26 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:54:05,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:05,045 INFO L82 PathProgramCache]: Analyzing trace with hash -285876443, now seen corresponding path program 25 times [2018-09-23 19:54:05,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:05,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:05,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:05,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:05,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:05,052 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:54:05,052 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:54:05,052 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) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-23 19:54:05,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:54:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:05,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:05,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:54:05,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-09-23 19:54:05,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 19:54:05,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 19:54:05,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:54:05,933 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-23 19:54:06,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:06,602 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-23 19:54:06,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:54:06,602 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-23 19:54:06,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:06,603 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:54:06,603 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:54:06,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:54:06,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:54:06,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 19:54:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 19:54:06,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-23 19:54:06,609 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-23 19:54:06,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:06,609 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-23 19:54:06,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 19:54:06,610 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-23 19:54:06,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 19:54:06,610 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:06,610 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1] [2018-09-23 19:54:06,611 INFO L423 AbstractCegarLoop]: === Iteration 27 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:54:06,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:06,611 INFO L82 PathProgramCache]: Analyzing trace with hash -272237116, now seen corresponding path program 26 times [2018-09-23 19:54:06,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:06,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:06,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:06,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:54:06,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:06,618 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:54:06,618 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:54:06,619 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:54:06,640 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:54:07,019 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:54:07,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:07,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:08,958 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:08,978 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:54:08,979 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-09-23 19:54:08,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 19:54:08,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 19:54:08,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:54:08,979 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-23 19:54:09,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:09,640 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-23 19:54:09,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 19:54:09,640 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-23 19:54:09,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:09,641 INFO L225 Difference]: With dead ends: 34 [2018-09-23 19:54:09,641 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 19:54:09,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:54:09,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 19:54:09,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-23 19:54:09,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:54:09,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-23 19:54:09,646 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-23 19:54:09,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:09,647 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-23 19:54:09,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 19:54:09,647 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-23 19:54:09,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-23 19:54:09,650 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:09,650 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1] [2018-09-23 19:54:09,650 INFO L423 AbstractCegarLoop]: === Iteration 28 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:54:09,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:09,650 INFO L82 PathProgramCache]: Analyzing trace with hash 150582021, now seen corresponding path program 27 times [2018-09-23 19:54:09,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:09,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:09,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:09,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:09,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:09,659 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:54:09,659 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:54:09,659 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) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-23 19:54:09,678 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:54:10,132 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-23 19:54:10,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:10,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:10,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:54:10,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-09-23 19:54:10,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 19:54:10,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 19:54:10,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:54:10,741 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-23 19:54:11,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:11,486 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-23 19:54:11,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:54:11,487 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-23 19:54:11,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:11,488 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:54:11,488 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:54:11,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:54:11,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:54:11,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 19:54:11,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 19:54:11,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-23 19:54:11,495 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-23 19:54:11,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:11,495 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-23 19:54:11,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 19:54:11,495 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-23 19:54:11,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 19:54:11,496 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:11,496 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1] [2018-09-23 19:54:11,496 INFO L423 AbstractCegarLoop]: === Iteration 29 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:54:11,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:11,497 INFO L82 PathProgramCache]: Analyzing trace with hash 373073380, now seen corresponding path program 28 times [2018-09-23 19:54:11,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:11,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:11,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:11,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:11,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:11,505 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:54:11,505 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:54:11,506 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 [2018-09-23 19:54:11,517 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:54:12,039 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:54:12,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:12,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:12,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:54:12,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-09-23 19:54:12,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:54:12,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:54:12,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:54:12,870 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-23 19:54:13,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:13,668 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-23 19:54:13,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:54:13,668 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-23 19:54:13,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:13,669 INFO L225 Difference]: With dead ends: 36 [2018-09-23 19:54:13,669 INFO L226 Difference]: Without dead ends: 34 [2018-09-23 19:54:13,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:54:13,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-23 19:54:13,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-23 19:54:13,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:54:13,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-23 19:54:13,675 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-23 19:54:13,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:13,675 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-23 19:54:13,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:54:13,676 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-23 19:54:13,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 19:54:13,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:13,676 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1] [2018-09-23 19:54:13,677 INFO L423 AbstractCegarLoop]: === Iteration 30 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:54:13,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:13,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1319629083, now seen corresponding path program 29 times [2018-09-23 19:54:13,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:13,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:13,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:13,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:13,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:13,684 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:54:13,684 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:54:13,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:54:13,704 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:54:14,205 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-23 19:54:14,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:14,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:14,926 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:54:14,927 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-09-23 19:54:14,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 19:54:14,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 19:54:14,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:54:14,928 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-23 19:54:15,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:15,728 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-23 19:54:15,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:54:15,729 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-23 19:54:15,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:15,729 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:54:15,729 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:54:15,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:54:15,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:54:15,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 19:54:15,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 19:54:15,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-23 19:54:15,735 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-23 19:54:15,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:15,736 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-23 19:54:15,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 19:54:15,736 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-23 19:54:15,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 19:54:15,736 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:15,736 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1] [2018-09-23 19:54:15,737 INFO L423 AbstractCegarLoop]: === Iteration 31 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:54:15,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:15,737 INFO L82 PathProgramCache]: Analyzing trace with hash 2041169412, now seen corresponding path program 30 times [2018-09-23 19:54:15,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:15,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:15,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:15,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:15,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:15,744 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:54:15,744 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:54:15,744 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 [2018-09-23 19:54:15,761 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:54:16,304 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-23 19:54:16,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:16,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:17,075 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:54:17,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-09-23 19:54:17,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 19:54:17,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 19:54:17,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:54:17,076 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-23 19:54:18,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:18,042 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-23 19:54:18,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:54:18,043 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-23 19:54:18,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:18,043 INFO L225 Difference]: With dead ends: 38 [2018-09-23 19:54:18,044 INFO L226 Difference]: Without dead ends: 36 [2018-09-23 19:54:18,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:54:18,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-23 19:54:18,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-23 19:54:18,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-23 19:54:18,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-23 19:54:18,049 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-23 19:54:18,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:18,050 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-23 19:54:18,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 19:54:18,050 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-23 19:54:18,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-23 19:54:18,050 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:18,050 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1] [2018-09-23 19:54:18,051 INFO L423 AbstractCegarLoop]: === Iteration 32 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:54:18,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:18,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1148259643, now seen corresponding path program 31 times [2018-09-23 19:54:18,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:18,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:18,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:18,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:18,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:18,058 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:54:18,058 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:54:18,058 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-23 19:54:18,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:54:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:18,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:19,515 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:54:19,516 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-09-23 19:54:19,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 19:54:19,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 19:54:19,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:54:19,517 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-23 19:54:20,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:20,485 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-23 19:54:20,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:54:20,485 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-23 19:54:20,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:20,486 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:54:20,486 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:54:20,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:54:20,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:54:20,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 19:54:20,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 19:54:20,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-23 19:54:20,492 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-23 19:54:20,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:20,492 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-23 19:54:20,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 19:54:20,492 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-23 19:54:20,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 19:54:20,493 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:20,493 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1] [2018-09-23 19:54:20,493 INFO L423 AbstractCegarLoop]: === Iteration 33 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:54:20,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:20,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1236312540, now seen corresponding path program 32 times [2018-09-23 19:54:20,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:20,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:20,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:20,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:54:20,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:20,500 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:54:20,501 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:54:20,501 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 [2018-09-23 19:54:20,512 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:54:21,188 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:54:21,188 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:21,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:21,959 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:54:21,959 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-09-23 19:54:21,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 19:54:21,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 19:54:21,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:54:21,961 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-23 19:54:23,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:23,086 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-23 19:54:23,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 19:54:23,086 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-23 19:54:23,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:23,087 INFO L225 Difference]: With dead ends: 40 [2018-09-23 19:54:23,087 INFO L226 Difference]: Without dead ends: 38 [2018-09-23 19:54:23,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:54:23,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-23 19:54:23,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-23 19:54:23,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-23 19:54:23,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-23 19:54:23,092 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-23 19:54:23,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:23,093 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-23 19:54:23,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 19:54:23,093 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-23 19:54:23,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-23 19:54:23,093 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:23,094 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1] [2018-09-23 19:54:23,094 INFO L423 AbstractCegarLoop]: === Iteration 34 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:54:23,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:23,094 INFO L82 PathProgramCache]: Analyzing trace with hash 329014949, now seen corresponding path program 33 times [2018-09-23 19:54:23,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:23,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:23,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:23,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:23,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:23,100 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:54:23,101 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:54:23,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:54:23,116 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:54:23,810 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-23 19:54:23,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:23,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:24,644 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:54:24,644 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-09-23 19:54:24,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 19:54:24,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 19:54:24,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:54:24,645 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-23 19:54:25,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:25,613 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-23 19:54:25,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:54:25,613 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-23 19:54:25,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:25,614 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:54:25,614 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:54:25,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:54:25,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:54:25,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 19:54:25,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 19:54:25,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-23 19:54:25,619 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-23 19:54:25,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:25,619 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-23 19:54:25,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 19:54:25,619 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-23 19:54:25,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 19:54:25,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:25,620 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1] [2018-09-23 19:54:25,620 INFO L423 AbstractCegarLoop]: === Iteration 35 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:54:25,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:25,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1609526852, now seen corresponding path program 34 times [2018-09-23 19:54:25,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:25,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:25,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:25,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:25,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:25,628 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:54:25,628 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:54:25,628 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 [2018-09-23 19:54:25,637 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:54:26,385 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:54:26,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:26,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:27,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:54:27,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-09-23 19:54:27,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:54:27,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:54:27,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:54:27,229 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-23 19:54:28,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:28,367 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-23 19:54:28,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 19:54:28,367 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-23 19:54:28,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:28,368 INFO L225 Difference]: With dead ends: 42 [2018-09-23 19:54:28,369 INFO L226 Difference]: Without dead ends: 40 [2018-09-23 19:54:28,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:54:28,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-23 19:54:28,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-23 19:54:28,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 19:54:28,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-23 19:54:28,375 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-23 19:54:28,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:28,376 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-23 19:54:28,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:54:28,376 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-23 19:54:28,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-23 19:54:28,377 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:28,377 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1] [2018-09-23 19:54:28,377 INFO L423 AbstractCegarLoop]: === Iteration 36 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:54:28,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:28,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1644277115, now seen corresponding path program 35 times [2018-09-23 19:54:28,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:28,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:28,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:28,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:28,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:28,385 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:54:28,385 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:54:28,386 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:54:28,396 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:54:29,346 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-23 19:54:29,346 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:29,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:30,364 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:54:30,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-09-23 19:54:30,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 19:54:30,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 19:54:30,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:54:30,366 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-23 19:54:31,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:31,445 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-23 19:54:31,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:54:31,445 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-23 19:54:31,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:31,446 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:54:31,446 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:54:31,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:54:31,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:54:31,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 19:54:31,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 19:54:31,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-23 19:54:31,451 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-23 19:54:31,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:31,451 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-23 19:54:31,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 19:54:31,451 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-23 19:54:31,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 19:54:31,451 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:31,451 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1] [2018-09-23 19:54:31,452 INFO L423 AbstractCegarLoop]: === Iteration 37 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:54:31,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:31,452 INFO L82 PathProgramCache]: Analyzing trace with hash 567015012, now seen corresponding path program 36 times [2018-09-23 19:54:31,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:31,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:31,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:31,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:31,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:31,459 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:54:31,459 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:54:31,459 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 [2018-09-23 19:54:31,474 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:54:32,478 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 19:54:32,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:32,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:33,477 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:33,497 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:54:33,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-09-23 19:54:33,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 19:54:33,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 19:54:33,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:54:33,498 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-23 19:54:34,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:34,654 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-23 19:54:34,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 19:54:34,654 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-23 19:54:34,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:34,655 INFO L225 Difference]: With dead ends: 44 [2018-09-23 19:54:34,655 INFO L226 Difference]: Without dead ends: 42 [2018-09-23 19:54:34,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:54:34,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-23 19:54:34,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-23 19:54:34,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-23 19:54:34,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-23 19:54:34,660 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-23 19:54:34,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:34,661 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-23 19:54:34,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 19:54:34,661 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-23 19:54:34,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-23 19:54:34,661 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:34,661 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1] [2018-09-23 19:54:34,662 INFO L423 AbstractCegarLoop]: === Iteration 38 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:54:34,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:34,662 INFO L82 PathProgramCache]: Analyzing trace with hash 397594213, now seen corresponding path program 37 times [2018-09-23 19:54:34,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:34,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:34,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:34,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:34,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:34,669 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:54:34,669 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:54:34,669 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 [2018-09-23 19:54:34,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:54:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:35,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:36,740 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:36,761 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:54:36,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-09-23 19:54:36,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 19:54:36,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 19:54:36,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:54:36,762 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-23 19:54:37,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:37,983 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-23 19:54:37,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:54:37,983 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-23 19:54:37,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:37,984 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:54:37,984 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:54:37,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:54:37,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:54:37,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 19:54:37,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 19:54:37,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-23 19:54:37,989 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-23 19:54:37,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:37,990 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-23 19:54:37,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 19:54:37,990 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-23 19:54:37,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 19:54:37,990 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:37,990 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1] [2018-09-23 19:54:37,991 INFO L423 AbstractCegarLoop]: === Iteration 39 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:54:37,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:37,991 INFO L82 PathProgramCache]: Analyzing trace with hash -559483260, now seen corresponding path program 38 times [2018-09-23 19:54:37,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:37,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:37,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:37,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:54:37,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:37,998 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:54:37,998 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:54:37,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-23 19:54:38,009 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:54:38,986 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:54:38,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:38,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:40,040 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:40,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:54:40,060 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-09-23 19:54:40,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 19:54:40,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 19:54:40,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:54:40,061 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-23 19:54:41,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:41,327 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-23 19:54:41,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 19:54:41,328 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-23 19:54:41,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:41,328 INFO L225 Difference]: With dead ends: 46 [2018-09-23 19:54:41,328 INFO L226 Difference]: Without dead ends: 44 [2018-09-23 19:54:41,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:54:41,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-23 19:54:41,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-23 19:54:41,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-23 19:54:41,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-23 19:54:41,333 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-23 19:54:41,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:41,333 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-23 19:54:41,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 19:54:41,333 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-23 19:54:41,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-23 19:54:41,333 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:41,333 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1] [2018-09-23 19:54:41,334 INFO L423 AbstractCegarLoop]: === Iteration 40 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:54:41,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:41,334 INFO L82 PathProgramCache]: Analyzing trace with hash -164113851, now seen corresponding path program 39 times [2018-09-23 19:54:41,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:41,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:41,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:41,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:41,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:41,340 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:54:41,340 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:54:41,340 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-09-23 19:54:41,357 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-23 19:54:42,544 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-23 19:54:42,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:42,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:43,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:54:43,608 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-09-23 19:54:43,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 19:54:43,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 19:54:43,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:54:43,609 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-23 19:54:44,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:44,920 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-23 19:54:44,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:54:44,920 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-23 19:54:44,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:44,921 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:54:44,921 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:54:44,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:54:44,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:54:44,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 19:54:44,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 19:54:44,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-23 19:54:44,926 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-23 19:54:44,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:44,926 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-23 19:54:44,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 19:54:44,926 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-23 19:54:44,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 19:54:44,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:44,926 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1] [2018-09-23 19:54:44,927 INFO L423 AbstractCegarLoop]: === Iteration 41 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:54:44,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:44,927 INFO L82 PathProgramCache]: Analyzing trace with hash -792564060, now seen corresponding path program 40 times [2018-09-23 19:54:44,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:44,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:44,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:44,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:44,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:44,932 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:54:44,932 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:54:44,932 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 [2018-09-23 19:54:44,940 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:54:46,197 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:54:46,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:46,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:47,394 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:54:47,394 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-09-23 19:54:47,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:54:47,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:54:47,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:54:47,396 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-23 19:54:48,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:48,793 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-23 19:54:48,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 19:54:48,793 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-23 19:54:48,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:48,794 INFO L225 Difference]: With dead ends: 48 [2018-09-23 19:54:48,794 INFO L226 Difference]: Without dead ends: 46 [2018-09-23 19:54:48,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:54:48,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-23 19:54:48,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-23 19:54:48,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-23 19:54:48,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-23 19:54:48,799 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-23 19:54:48,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:48,799 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-23 19:54:48,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:54:48,799 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-23 19:54:48,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-23 19:54:48,800 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:48,800 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1] [2018-09-23 19:54:48,800 INFO L423 AbstractCegarLoop]: === Iteration 42 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:54:48,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:48,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1200315941, now seen corresponding path program 41 times [2018-09-23 19:54:48,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:48,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:48,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:48,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:48,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:48,807 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:54:48,807 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:54:48,807 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 [2018-09-23 19:54:48,821 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:54:50,322 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-23 19:54:50,322 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:50,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:51,461 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:54:51,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-09-23 19:54:51,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 19:54:51,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 19:54:51,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:54:51,462 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-23 19:54:52,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:52,886 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-23 19:54:52,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:54:52,886 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-23 19:54:52,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:52,887 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:54:52,887 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:54:52,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:54:52,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:54:52,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 19:54:52,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 19:54:52,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-23 19:54:52,892 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-23 19:54:52,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:52,893 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-23 19:54:52,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 19:54:52,893 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-23 19:54:52,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 19:54:52,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:52,893 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1] [2018-09-23 19:54:52,893 INFO L423 AbstractCegarLoop]: === Iteration 43 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:54:52,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:52,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1444913468, now seen corresponding path program 42 times [2018-09-23 19:54:52,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:52,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:52,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:52,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:52,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:52,900 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:54:52,900 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:54:52,900 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 [2018-09-23 19:54:52,916 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:54:55,013 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-23 19:54:55,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:55,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:56,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:54:56,351 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-09-23 19:54:56,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 19:54:56,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 19:54:56,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:54:56,352 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-23 19:54:58,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:58,030 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-23 19:54:58,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 19:54:58,031 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-23 19:54:58,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:58,032 INFO L225 Difference]: With dead ends: 50 [2018-09-23 19:54:58,032 INFO L226 Difference]: Without dead ends: 48 [2018-09-23 19:54:58,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:54:58,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-23 19:54:58,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-23 19:54:58,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-23 19:54:58,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-23 19:54:58,038 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-23 19:54:58,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:58,038 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-23 19:54:58,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 19:54:58,038 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-23 19:54:58,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-23 19:54:58,038 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:58,039 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1] [2018-09-23 19:54:58,039 INFO L423 AbstractCegarLoop]: === Iteration 44 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:54:58,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:58,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1842646523, now seen corresponding path program 43 times [2018-09-23 19:54:58,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:58,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:58,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:58,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:58,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:58,046 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:54:58,046 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:54:58,046 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 [2018-09-23 19:54:58,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:54:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:59,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:00,947 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:55:00,948 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-09-23 19:55:00,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 19:55:00,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 19:55:00,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:55:00,948 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-23 19:55:02,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:02,511 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-23 19:55:02,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:55:02,511 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-23 19:55:02,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:02,512 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:55:02,512 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:55:02,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:55:02,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:55:02,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 19:55:02,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 19:55:02,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-23 19:55:02,518 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-23 19:55:02,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:02,518 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-23 19:55:02,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 19:55:02,518 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-23 19:55:02,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 19:55:02,519 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:02,519 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1] [2018-09-23 19:55:02,519 INFO L423 AbstractCegarLoop]: === Iteration 45 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:55:02,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:02,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1287469340, now seen corresponding path program 44 times [2018-09-23 19:55:02,519 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:02,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:02,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:02,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:55:02,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:02,526 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:55:02,526 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:55:02,526 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 [2018-09-23 19:55:02,537 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:55:04,217 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:55:04,217 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:04,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:05,499 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:55:05,499 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-09-23 19:55:05,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 19:55:05,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 19:55:05,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:55:05,500 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-23 19:55:07,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:07,122 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-23 19:55:07,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:55:07,123 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-23 19:55:07,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:07,124 INFO L225 Difference]: With dead ends: 52 [2018-09-23 19:55:07,124 INFO L226 Difference]: Without dead ends: 50 [2018-09-23 19:55:07,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:55:07,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-23 19:55:07,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-23 19:55:07,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-23 19:55:07,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-23 19:55:07,128 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-23 19:55:07,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:07,128 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-23 19:55:07,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 19:55:07,128 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-23 19:55:07,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-23 19:55:07,128 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:07,129 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1] [2018-09-23 19:55:07,129 INFO L423 AbstractCegarLoop]: === Iteration 46 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:55:07,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:07,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1256845851, now seen corresponding path program 45 times [2018-09-23 19:55:07,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:07,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:07,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:07,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:07,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:07,136 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:55:07,136 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:55:07,137 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 [2018-09-23 19:55:07,153 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:55:09,256 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-23 19:55:09,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:09,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:10,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:10,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:55:10,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-09-23 19:55:10,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 19:55:10,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 19:55:10,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:55:10,628 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-23 19:55:12,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:12,325 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-23 19:55:12,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:55:12,326 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-23 19:55:12,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:12,327 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:55:12,327 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:55:12,327 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:55:12,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:55:12,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 19:55:12,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 19:55:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-23 19:55:12,331 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-23 19:55:12,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:12,332 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-23 19:55:12,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 19:55:12,332 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-23 19:55:12,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 19:55:12,332 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:12,332 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2018-09-23 19:55:12,333 INFO L423 AbstractCegarLoop]: === Iteration 47 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:55:12,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:12,333 INFO L82 PathProgramCache]: Analyzing trace with hash -307517692, now seen corresponding path program 46 times [2018-09-23 19:55:12,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:12,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:12,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:12,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:12,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:12,339 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:55:12,339 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:55:12,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:55:12,348 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:55:14,673 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:55:14,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:14,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:16,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:55:16,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-09-23 19:55:16,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 19:55:16,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 19:55:16,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:55:16,063 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-23 19:55:17,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:17,827 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-23 19:55:17,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 19:55:17,828 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-23 19:55:17,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:17,829 INFO L225 Difference]: With dead ends: 54 [2018-09-23 19:55:17,829 INFO L226 Difference]: Without dead ends: 52 [2018-09-23 19:55:17,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:55:17,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-23 19:55:17,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-23 19:55:17,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-23 19:55:17,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-23 19:55:17,834 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-23 19:55:17,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:17,834 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-23 19:55:17,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 19:55:17,834 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-23 19:55:17,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-23 19:55:17,835 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:17,835 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1] [2018-09-23 19:55:17,835 INFO L423 AbstractCegarLoop]: === Iteration 48 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:55:17,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:17,835 INFO L82 PathProgramCache]: Analyzing trace with hash -943115835, now seen corresponding path program 47 times [2018-09-23 19:55:17,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:17,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:17,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:17,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:17,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:17,842 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:55:17,842 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:55:17,842 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 [2018-09-23 19:55:17,853 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:55:20,480 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-23 19:55:20,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:20,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:21,950 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:55:21,950 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-09-23 19:55:21,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 19:55:21,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 19:55:21,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:55:21,951 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-23 19:55:23,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:23,786 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-23 19:55:23,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:55:23,787 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-23 19:55:23,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:23,788 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:55:23,788 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:55:23,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:55:23,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:55:23,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 19:55:23,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 19:55:23,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-23 19:55:23,793 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-23 19:55:23,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:23,794 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-23 19:55:23,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 19:55:23,794 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-23 19:55:23,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 19:55:23,794 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:23,794 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1] [2018-09-23 19:55:23,794 INFO L423 AbstractCegarLoop]: === Iteration 49 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:55:23,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:23,795 INFO L82 PathProgramCache]: Analyzing trace with hash 828178212, now seen corresponding path program 48 times [2018-09-23 19:55:23,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:23,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:23,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:23,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:23,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:23,800 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:55:23,800 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:55:23,800 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 [2018-09-23 19:55:23,807 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:55:26,540 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 19:55:26,540 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:26,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:27,974 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:55:27,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-09-23 19:55:27,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 19:55:27,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 19:55:27,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:55:27,975 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-23 19:55:29,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:29,886 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-23 19:55:29,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 19:55:29,887 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-23 19:55:29,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:29,887 INFO L225 Difference]: With dead ends: 56 [2018-09-23 19:55:29,888 INFO L226 Difference]: Without dead ends: 54 [2018-09-23 19:55:29,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:55:29,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-23 19:55:29,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-23 19:55:29,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-23 19:55:29,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-23 19:55:29,892 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-23 19:55:29,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:29,893 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-23 19:55:29,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 19:55:29,893 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-23 19:55:29,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 19:55:29,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:29,893 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1] [2018-09-23 19:55:29,893 INFO L423 AbstractCegarLoop]: === Iteration 50 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:55:29,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:29,894 INFO L82 PathProgramCache]: Analyzing trace with hash -96281179, now seen corresponding path program 49 times [2018-09-23 19:55:29,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:29,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:29,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:29,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:29,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:29,900 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:55:29,901 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:55:29,901 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:55:29,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:55:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:55:32,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:34,147 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:55:34,147 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-09-23 19:55:34,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 19:55:34,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 19:55:34,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:55:34,148 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-23 19:55:36,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:36,123 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-23 19:55:36,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:55:36,124 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-23 19:55:36,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:36,124 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:55:36,124 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:55:36,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:55:36,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:55:36,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 19:55:36,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 19:55:36,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-23 19:55:36,131 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-23 19:55:36,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:36,132 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-23 19:55:36,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 19:55:36,132 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-23 19:55:36,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 19:55:36,132 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:36,132 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1] [2018-09-23 19:55:36,132 INFO L423 AbstractCegarLoop]: === Iteration 51 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:55:36,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:36,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1310248772, now seen corresponding path program 50 times [2018-09-23 19:55:36,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:36,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:36,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:36,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:55:36,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:36,140 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:55:36,140 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:55:36,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:55:36,151 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:55:38,822 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:55:38,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:38,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:40,398 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:55:40,398 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-09-23 19:55:40,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 19:55:40,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 19:55:40,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:55:40,399 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-23 19:55:42,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:42,476 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-23 19:55:42,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 19:55:42,476 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-23 19:55:42,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:42,477 INFO L225 Difference]: With dead ends: 58 [2018-09-23 19:55:42,477 INFO L226 Difference]: Without dead ends: 56 [2018-09-23 19:55:42,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:55:42,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-23 19:55:42,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-23 19:55:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-23 19:55:42,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-23 19:55:42,482 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-23 19:55:42,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:42,483 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-23 19:55:42,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 19:55:42,483 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-23 19:55:42,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-23 19:55:42,483 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:42,484 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1] [2018-09-23 19:55:42,484 INFO L423 AbstractCegarLoop]: === Iteration 52 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:55:42,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:42,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1963004293, now seen corresponding path program 51 times [2018-09-23 19:55:42,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:42,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:42,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:42,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:42,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:42,491 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:55:42,492 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:55:42,492 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) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-23 19:55:42,513 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:55:45,985 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-23 19:55:45,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:45,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:47,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:47,610 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:55:47,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-09-23 19:55:47,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 19:55:47,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 19:55:47,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:55:47,612 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-23 19:55:49,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:49,796 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-23 19:55:49,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:55:49,797 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-23 19:55:49,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:49,797 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:55:49,797 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:55:49,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:55:49,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:55:49,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-23 19:55:49,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 19:55:49,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-23 19:55:49,803 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-23 19:55:49,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:49,804 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-23 19:55:49,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 19:55:49,804 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-23 19:55:49,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 19:55:49,804 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:49,804 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1] [2018-09-23 19:55:49,804 INFO L423 AbstractCegarLoop]: === Iteration 53 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:55:49,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:49,805 INFO L82 PathProgramCache]: Analyzing trace with hash 723588964, now seen corresponding path program 52 times [2018-09-23 19:55:49,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:49,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:49,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:49,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:49,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:49,812 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:55:49,812 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:55:49,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:55:49,827 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:55:53,024 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:55:53,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:55:53,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:55:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:55:54,713 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:55:54,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-09-23 19:55:54,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 19:55:54,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 19:55:54,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:55:54,714 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-23 19:55:56,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:55:56,917 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-23 19:55:56,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:55:56,918 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-23 19:55:56,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:55:56,919 INFO L225 Difference]: With dead ends: 60 [2018-09-23 19:55:56,919 INFO L226 Difference]: Without dead ends: 58 [2018-09-23 19:55:56,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:55:56,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-23 19:55:56,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-23 19:55:56,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-23 19:55:56,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-23 19:55:56,923 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-23 19:55:56,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:55:56,924 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-23 19:55:56,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 19:55:56,924 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-23 19:55:56,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-23 19:55:56,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:55:56,924 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1] [2018-09-23 19:55:56,924 INFO L423 AbstractCegarLoop]: === Iteration 54 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:55:56,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:55:56,925 INFO L82 PathProgramCache]: Analyzing trace with hash 956419429, now seen corresponding path program 53 times [2018-09-23 19:55:56,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:55:56,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:55:56,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:56,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:55:56,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:55:56,930 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:55:56,930 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:55:56,930 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 [2018-09-23 19:55:56,944 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:56:00,933 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-23 19:56:00,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:00,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:02,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:56:02,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-09-23 19:56:02,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 19:56:02,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 19:56:02,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:56:02,681 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-23 19:56:04,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:04,994 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-23 19:56:04,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:56:04,994 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-23 19:56:04,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:04,995 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:56:04,995 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:56:04,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:56:04,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:56:05,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 19:56:05,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 19:56:05,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-23 19:56:05,000 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-23 19:56:05,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:05,000 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-23 19:56:05,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 19:56:05,000 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-23 19:56:05,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 19:56:05,001 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:05,001 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1] [2018-09-23 19:56:05,001 INFO L423 AbstractCegarLoop]: === Iteration 55 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:56:05,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:05,001 INFO L82 PathProgramCache]: Analyzing trace with hash -415770748, now seen corresponding path program 54 times [2018-09-23 19:56:05,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:05,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:05,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:05,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:56:05,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:05,007 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:56:05,007 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:56:05,007 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 [2018-09-23 19:56:05,024 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:56:09,407 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-23 19:56:09,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:09,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:11,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:56:11,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-09-23 19:56:11,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 19:56:11,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 19:56:11,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:56:11,225 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-23 19:56:13,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:13,606 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-23 19:56:13,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 19:56:13,606 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-23 19:56:13,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:13,607 INFO L225 Difference]: With dead ends: 62 [2018-09-23 19:56:13,607 INFO L226 Difference]: Without dead ends: 60 [2018-09-23 19:56:13,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:56:13,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-23 19:56:13,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-23 19:56:13,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-23 19:56:13,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-23 19:56:13,612 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-23 19:56:13,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:13,613 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-23 19:56:13,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 19:56:13,613 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-23 19:56:13,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-23 19:56:13,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:13,613 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1] [2018-09-23 19:56:13,613 INFO L423 AbstractCegarLoop]: === Iteration 56 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:56:13,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:13,614 INFO L82 PathProgramCache]: Analyzing trace with hash -3993275, now seen corresponding path program 55 times [2018-09-23 19:56:13,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:13,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:13,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:13,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:56:13,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:13,619 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:56:13,619 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:56:13,620 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 [2018-09-23 19:56:13,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:56:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:56:17,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:19,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:56:19,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-09-23 19:56:19,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 19:56:19,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 19:56:19,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:56:19,281 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-23 19:56:21,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:21,730 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-23 19:56:21,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:56:21,730 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-23 19:56:21,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:21,731 INFO L225 Difference]: With dead ends: 63 [2018-09-23 19:56:21,731 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 19:56:21,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:56:21,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 19:56:21,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 19:56:21,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 19:56:21,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-23 19:56:21,738 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-23 19:56:21,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:21,738 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-23 19:56:21,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 19:56:21,738 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-23 19:56:21,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 19:56:21,739 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:21,739 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1] [2018-09-23 19:56:21,739 INFO L423 AbstractCegarLoop]: === Iteration 57 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:56:21,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:21,739 INFO L82 PathProgramCache]: Analyzing trace with hash -123793500, now seen corresponding path program 56 times [2018-09-23 19:56:21,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:21,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:21,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:21,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:56:21,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:21,746 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:56:21,746 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:56:21,747 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 [2018-09-23 19:56:21,756 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:56:25,607 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:56:25,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:25,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:27,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:27,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:56:27,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-09-23 19:56:27,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 19:56:27,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 19:56:27,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:56:27,636 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-23 19:56:30,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:30,167 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-23 19:56:30,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 19:56:30,167 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-23 19:56:30,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:30,168 INFO L225 Difference]: With dead ends: 64 [2018-09-23 19:56:30,168 INFO L226 Difference]: Without dead ends: 62 [2018-09-23 19:56:30,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:56:30,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-23 19:56:30,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-23 19:56:30,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-23 19:56:30,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-23 19:56:30,174 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-23 19:56:30,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:30,174 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-23 19:56:30,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 19:56:30,174 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-23 19:56:30,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-23 19:56:30,175 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:30,175 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1] [2018-09-23 19:56:30,175 INFO L423 AbstractCegarLoop]: === Iteration 58 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:56:30,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:30,175 INFO L82 PathProgramCache]: Analyzing trace with hash 457366821, now seen corresponding path program 57 times [2018-09-23 19:56:30,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:30,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:30,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:30,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:56:30,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:30,182 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:56:30,182 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:56:30,182 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 [2018-09-23 19:56:30,200 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:56:35,286 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-23 19:56:35,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:35,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:37,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:56:37,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-09-23 19:56:37,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 19:56:37,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 19:56:37,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:56:37,570 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-23 19:56:40,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:40,188 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-23 19:56:40,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 19:56:40,188 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-23 19:56:40,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:40,189 INFO L225 Difference]: With dead ends: 65 [2018-09-23 19:56:40,189 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 19:56:40,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=123, Invalid=3659, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:56:40,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 19:56:40,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-23 19:56:40,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 19:56:40,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-23 19:56:40,194 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-23 19:56:40,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:40,195 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-23 19:56:40,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 19:56:40,195 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-23 19:56:40,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 19:56:40,195 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:40,195 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1] [2018-09-23 19:56:40,196 INFO L423 AbstractCegarLoop]: === Iteration 59 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:56:40,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:40,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1293467588, now seen corresponding path program 58 times [2018-09-23 19:56:40,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:40,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:40,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:40,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:56:40,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:40,202 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:56:40,203 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:56:40,203 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 [2018-09-23 19:56:40,217 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:56:44,903 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:56:44,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:44,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:46,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:56:46,992 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-09-23 19:56:46,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 19:56:46,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 19:56:46,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:56:46,993 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-23 19:56:49,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:56:49,703 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-23 19:56:49,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 19:56:49,703 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-23 19:56:49,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:56:49,704 INFO L225 Difference]: With dead ends: 66 [2018-09-23 19:56:49,704 INFO L226 Difference]: Without dead ends: 64 [2018-09-23 19:56:49,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:56:49,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-23 19:56:49,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-23 19:56:49,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-23 19:56:49,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-23 19:56:49,709 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-23 19:56:49,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:56:49,709 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-23 19:56:49,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 19:56:49,710 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-23 19:56:49,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-23 19:56:49,710 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:56:49,710 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1] [2018-09-23 19:56:49,710 INFO L423 AbstractCegarLoop]: === Iteration 60 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:56:49,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:56:49,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1442787589, now seen corresponding path program 59 times [2018-09-23 19:56:49,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:56:49,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:56:49,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:49,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:56:49,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:56:49,718 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:56:49,718 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:56:49,718 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 [2018-09-23 19:56:49,735 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:56:55,730 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-23 19:56:55,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:56:55,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:56:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:56:57,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:56:57,866 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-09-23 19:56:57,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 19:56:57,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 19:56:57,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:56:57,868 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-23 19:57:00,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:57:00,662 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-23 19:57:00,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 19:57:00,663 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-23 19:57:00,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:57:00,663 INFO L225 Difference]: With dead ends: 67 [2018-09-23 19:57:00,664 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 19:57:00,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=127, Invalid=3905, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:57:00,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 19:57:00,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 19:57:00,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 19:57:00,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-23 19:57:00,668 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-23 19:57:00,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:57:00,668 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-23 19:57:00,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 19:57:00,669 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-23 19:57:00,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 19:57:00,669 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:57:00,669 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1] [2018-09-23 19:57:00,669 INFO L423 AbstractCegarLoop]: === Iteration 61 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:57:00,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:57:00,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1776740324, now seen corresponding path program 60 times [2018-09-23 19:57:00,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:57:00,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:57:00,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:57:00,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:57:00,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:57:00,677 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:57:00,677 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:57:00,677 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 [2018-09-23 19:57:00,694 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:57:06,828 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-23 19:57:06,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:57:06,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:57:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:57:08,965 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:57:08,965 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-09-23 19:57:08,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 19:57:08,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 19:57:08,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:57:08,966 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-23 19:57:11,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:57:11,845 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-23 19:57:11,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 19:57:11,846 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-23 19:57:11,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:57:11,847 INFO L225 Difference]: With dead ends: 68 [2018-09-23 19:57:11,847 INFO L226 Difference]: Without dead ends: 66 [2018-09-23 19:57:11,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=129, Invalid=4031, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:57:11,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-23 19:57:11,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-23 19:57:11,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-23 19:57:11,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-23 19:57:11,852 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-23 19:57:11,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:57:11,853 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-23 19:57:11,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 19:57:11,853 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-23 19:57:11,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-23 19:57:11,853 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:57:11,853 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1] [2018-09-23 19:57:11,853 INFO L423 AbstractCegarLoop]: === Iteration 62 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:57:11,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:57:11,854 INFO L82 PathProgramCache]: Analyzing trace with hash -755626779, now seen corresponding path program 61 times [2018-09-23 19:57:11,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:57:11,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:57:11,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:57:11,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:57:11,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:57:11,862 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:57:11,862 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:57:11,862 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 [2018-09-23 19:57:11,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:57:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:57:17,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:57:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:57:19,924 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:57:19,924 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-09-23 19:57:19,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 19:57:19,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 19:57:19,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:57:19,925 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-23 19:57:22,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:57:22,895 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-23 19:57:22,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:57:22,895 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-23 19:57:22,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:57:22,896 INFO L225 Difference]: With dead ends: 69 [2018-09-23 19:57:22,896 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 19:57:22,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=131, Invalid=4159, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:57:22,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 19:57:22,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 19:57:22,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 19:57:22,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-23 19:57:22,902 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-23 19:57:22,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:57:22,902 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-23 19:57:22,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 19:57:22,902 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-23 19:57:22,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 19:57:22,903 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:57:22,903 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1] [2018-09-23 19:57:22,903 INFO L423 AbstractCegarLoop]: === Iteration 63 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:57:22,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:57:22,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1949595644, now seen corresponding path program 62 times [2018-09-23 19:57:22,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:57:22,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:57:22,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:57:22,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:57:22,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:57:22,910 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:57:22,910 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:57:22,910 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:57:22,927 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:57:28,897 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:57:28,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:57:28,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:57:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:57:31,188 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:57:31,189 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-09-23 19:57:31,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 19:57:31,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 19:57:31,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:57:31,189 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-23 19:57:34,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:57:34,238 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-23 19:57:34,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 19:57:34,238 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-23 19:57:34,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:57:34,239 INFO L225 Difference]: With dead ends: 70 [2018-09-23 19:57:34,239 INFO L226 Difference]: Without dead ends: 68 [2018-09-23 19:57:34,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:57:34,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-23 19:57:34,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-23 19:57:34,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-23 19:57:34,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-23 19:57:34,245 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-23 19:57:34,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:57:34,245 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-23 19:57:34,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 19:57:34,246 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-23 19:57:34,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-23 19:57:34,246 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:57:34,246 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1] [2018-09-23 19:57:34,246 INFO L423 AbstractCegarLoop]: === Iteration 64 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:57:34,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:57:34,247 INFO L82 PathProgramCache]: Analyzing trace with hash -307924795, now seen corresponding path program 63 times [2018-09-23 19:57:34,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:57:34,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:57:34,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:57:34,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:57:34,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:57:34,254 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:57:34,254 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:57:34,254 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) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-23 19:57:34,264 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:57:42,143 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-23 19:57:42,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:57:42,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:57:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:57:44,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:57:44,608 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-09-23 19:57:44,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 19:57:44,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 19:57:44,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:57:44,609 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-23 19:57:47,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:57:47,756 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-23 19:57:47,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 19:57:47,757 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-23 19:57:47,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:57:47,758 INFO L225 Difference]: With dead ends: 71 [2018-09-23 19:57:47,758 INFO L226 Difference]: Without dead ends: 69 [2018-09-23 19:57:47,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:57:47,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-23 19:57:47,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-23 19:57:47,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 19:57:47,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-23 19:57:47,765 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-23 19:57:47,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:57:47,765 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-23 19:57:47,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 19:57:47,765 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-23 19:57:47,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 19:57:47,766 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:57:47,766 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1] [2018-09-23 19:57:47,766 INFO L423 AbstractCegarLoop]: === Iteration 65 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:57:47,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:57:47,766 INFO L82 PathProgramCache]: Analyzing trace with hash -955736028, now seen corresponding path program 64 times [2018-09-23 19:57:47,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:57:47,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:57:47,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:57:47,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:57:47,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:57:47,774 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:57:47,774 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:57:47,774 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 [2018-09-23 19:57:47,788 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:57:54,723 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:57:54,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:57:54,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:57:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:57:57,996 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:57:57,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-09-23 19:57:57,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 19:57:57,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 19:57:57,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:57:57,998 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-23 19:58:01,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:58:01,246 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-23 19:58:01,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 19:58:01,246 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-23 19:58:01,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:58:01,247 INFO L225 Difference]: With dead ends: 72 [2018-09-23 19:58:01,247 INFO L226 Difference]: Without dead ends: 70 [2018-09-23 19:58:01,247 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:58:01,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-23 19:58:01,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-23 19:58:01,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-23 19:58:01,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-23 19:58:01,252 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-23 19:58:01,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:58:01,252 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-23 19:58:01,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 19:58:01,252 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-23 19:58:01,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-23 19:58:01,253 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:58:01,253 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1] [2018-09-23 19:58:01,253 INFO L423 AbstractCegarLoop]: === Iteration 66 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-23 19:58:01,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:58:01,253 INFO L82 PathProgramCache]: Analyzing trace with hash 436952229, now seen corresponding path program 65 times [2018-09-23 19:58:01,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:58:01,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:58:01,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:58:01,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:58:01,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:58:01,261 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-23 19:58:01,261 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-23 19:58:01,261 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 [2018-09-23 19:58:01,270 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown