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 0.1.23-2eb0a67 [2018-10-03 08:57:36,316 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 08:57:36,318 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 08:57:36,334 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 08:57:36,334 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 08:57:36,336 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 08:57:36,337 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 08:57:36,339 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 08:57:36,340 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 08:57:36,341 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 08:57:36,342 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-03 08:57:36,342 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-03 08:57:36,343 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-03 08:57:36,344 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-03 08:57:36,345 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-03 08:57:36,346 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-03 08:57:36,347 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-03 08:57:36,349 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-03 08:57:36,351 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-03 08:57:36,352 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-03 08:57:36,354 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-03 08:57:36,355 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-03 08:57:36,357 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-03 08:57:36,374 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-03 08:57:36,402 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 08:57:36,402 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 08:57:36,403 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 08:57:36,403 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 08:57:36,406 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 08:57:36,406 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 08:57:36,409 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 08:57:36,409 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 08:57:36,409 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 08:57:36,409 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 08:57:36,410 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 08:57:36,410 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 08:57:36,410 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 08:57:36,410 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 08:57:36,410 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 08:57:36,411 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 08:57:36,411 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 08:57:36,411 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 08:57:36,411 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 08:57:36,411 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 08:57:36,412 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 08:57:36,412 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 08:57:36,412 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:57:36,412 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 08:57:36,413 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 08:57:36,414 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 08:57:36,414 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 08:57:36,414 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 08:57:36,414 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 08:57:36,414 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 08:57:36,469 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 08:57:36,485 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 08:57:36,489 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 08:57:36,491 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 08:57:36,491 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 08:57:36,492 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl [2018-10-03 08:57:36,493 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl' [2018-10-03 08:57:36,545 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 08:57:36,548 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 08:57:36,549 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 08:57:36,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 08:57:36,549 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 08:57:36,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:57:36" (1/1) ... [2018-10-03 08:57:36,583 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:57:36" (1/1) ... [2018-10-03 08:57:36,588 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-03 08:57:36,588 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-03 08:57:36,588 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-03 08:57:36,591 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 08:57:36,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 08:57:36,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 08:57:36,592 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 08:57:36,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:57:36" (1/1) ... [2018-10-03 08:57:36,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:57:36" (1/1) ... [2018-10-03 08:57:36,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:57:36" (1/1) ... [2018-10-03 08:57:36,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:57:36" (1/1) ... [2018-10-03 08:57:36,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:57:36" (1/1) ... [2018-10-03 08:57:36,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:57:36" (1/1) ... [2018-10-03 08:57:36,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:57:36" (1/1) ... [2018-10-03 08:57:36,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 08:57:36,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 08:57:36,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 08:57:36,617 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 08:57:36,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:57:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:57:36,685 INFO L124 BoogieDeclarations]: Specification and implementation of procedure mult given in one single declaration [2018-10-03 08:57:36,685 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2018-10-03 08:57:36,686 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2018-10-03 08:57:36,753 WARN L617 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-10-03 08:57:36,915 INFO L337 CfgBuilder]: Using library mode [2018-10-03 08:57:36,916 INFO L202 PluginConnector]: Adding new model Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:57:36 BoogieIcfgContainer [2018-10-03 08:57:36,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 08:57:36,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 08:57:36,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 08:57:36,921 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 08:57:36,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:57:36" (1/2) ... [2018-10-03 08:57:36,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11b10bd0 and model type Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 08:57:36, skipping insertion in model container [2018-10-03 08:57:36,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:57:36" (2/2) ... [2018-10-03 08:57:36,925 INFO L112 eAbstractionObserver]: Analyzing ICFG Mult1-Safe.bpl [2018-10-03 08:57:36,938 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 08:57:36,946 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 08:57:37,008 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 08:57:37,009 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 08:57:37,009 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 08:57:37,009 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 08:57:37,009 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 08:57:37,009 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 08:57:37,010 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 08:57:37,010 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 08:57:37,010 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 08:57:37,026 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-03 08:57:37,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-03 08:57:37,033 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:37,034 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-03 08:57:37,035 INFO L423 AbstractCegarLoop]: === Iteration 1 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:37,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:37,043 INFO L82 PathProgramCache]: Analyzing trace with hash 924708, now seen corresponding path program 1 times [2018-10-03 08:57:37,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:37,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:37,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:37,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:37,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:37,139 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:37,139 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:37,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:37,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:37,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:37,461 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:57:37,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-03 08:57:37,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:57:37,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:57:37,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:57:37,482 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 5 states. [2018-10-03 08:57:37,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:37,604 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-03 08:57:37,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:57:37,609 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-10-03 08:57:37,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:37,622 INFO L225 Difference]: With dead ends: 10 [2018-10-03 08:57:37,622 INFO L226 Difference]: Without dead ends: 6 [2018-10-03 08:57:37,626 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 [2018-10-03 08:57:37,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-03 08:57:37,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-03 08:57:37,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-03 08:57:37,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-03 08:57:37,661 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-03 08:57:37,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:37,661 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-03 08:57:37,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:57:37,662 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-03 08:57:37,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-03 08:57:37,662 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:37,662 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-03 08:57:37,662 INFO L423 AbstractCegarLoop]: === Iteration 2 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:37,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:37,663 INFO L82 PathProgramCache]: Analyzing trace with hash 28663973, now seen corresponding path program 1 times [2018-10-03 08:57:37,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:37,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:37,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:37,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:37,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:37,669 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:37,669 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:37,669 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:37,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:37,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:37,793 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:57:37,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-10-03 08:57:37,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:57:37,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:57:37,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:57:37,797 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-10-03 08:57:37,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:37,992 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-03 08:57:37,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:57:37,993 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-10-03 08:57:37,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:37,993 INFO L225 Difference]: With dead ends: 9 [2018-10-03 08:57:37,994 INFO L226 Difference]: Without dead ends: 7 [2018-10-03 08:57:37,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:57:37,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-03 08:57:37,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-03 08:57:37,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-03 08:57:37,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-03 08:57:37,998 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-03 08:57:37,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:37,999 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-03 08:57:37,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:57:37,999 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-03 08:57:37,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-03 08:57:38,000 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:38,000 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-03 08:57:38,000 INFO L423 AbstractCegarLoop]: === Iteration 3 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:38,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:38,001 INFO L82 PathProgramCache]: Analyzing trace with hash 888581188, now seen corresponding path program 2 times [2018-10-03 08:57:38,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:38,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:38,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:38,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:38,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:38,008 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:38,008 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:38,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:38,023 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:38,033 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:38,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:38,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:38,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:57:38,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-10-03 08:57:38,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:57:38,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:57:38,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:57:38,336 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-10-03 08:57:38,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:38,404 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-03 08:57:38,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:57:38,409 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-10-03 08:57:38,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:38,409 INFO L225 Difference]: With dead ends: 10 [2018-10-03 08:57:38,410 INFO L226 Difference]: Without dead ends: 8 [2018-10-03 08:57:38,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:57:38,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-03 08:57:38,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-03 08:57:38,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-03 08:57:38,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-03 08:57:38,414 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-03 08:57:38,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:38,415 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-03 08:57:38,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:57:38,415 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-03 08:57:38,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-03 08:57:38,416 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:38,416 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2018-10-03 08:57:38,416 INFO L423 AbstractCegarLoop]: === Iteration 4 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:38,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:38,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1776211077, now seen corresponding path program 3 times [2018-10-03 08:57:38,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:38,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:38,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:38,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:38,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:38,426 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:38,426 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:38,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:38,441 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:38,456 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-03 08:57:38,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:38,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:38,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:57:38,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-10-03 08:57:38,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:57:38,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:57:38,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:57:38,679 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-10-03 08:57:38,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:38,770 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-03 08:57:38,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:57:38,771 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-03 08:57:38,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:38,771 INFO L225 Difference]: With dead ends: 11 [2018-10-03 08:57:38,772 INFO L226 Difference]: Without dead ends: 9 [2018-10-03 08:57:38,773 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 [2018-10-03 08:57:38,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-03 08:57:38,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-03 08:57:38,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-03 08:57:38,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-03 08:57:38,777 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-03 08:57:38,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:38,778 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-03 08:57:38,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:57:38,778 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-03 08:57:38,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 08:57:38,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:38,779 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2018-10-03 08:57:38,779 INFO L423 AbstractCegarLoop]: === Iteration 5 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:38,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:38,780 INFO L82 PathProgramCache]: Analyzing trace with hash -772033436, now seen corresponding path program 4 times [2018-10-03 08:57:38,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:38,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:38,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:38,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:38,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:38,789 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:38,789 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:38,789 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:38,802 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:38,812 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:38,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:38,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:39,271 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:39,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:57:39,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-10-03 08:57:39,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:57:39,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:57:39,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:57:39,294 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-10-03 08:57:39,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:39,440 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-03 08:57:39,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:57:39,441 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-10-03 08:57:39,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:39,441 INFO L225 Difference]: With dead ends: 12 [2018-10-03 08:57:39,441 INFO L226 Difference]: Without dead ends: 10 [2018-10-03 08:57:39,442 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 [2018-10-03 08:57:39,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-03 08:57:39,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-03 08:57:39,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-03 08:57:39,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-03 08:57:39,446 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-03 08:57:39,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:39,446 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-03 08:57:39,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:57:39,447 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-03 08:57:39,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 08:57:39,447 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:39,447 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1] [2018-10-03 08:57:39,448 INFO L423 AbstractCegarLoop]: === Iteration 6 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:39,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:39,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1836765285, now seen corresponding path program 5 times [2018-10-03 08:57:39,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:39,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:39,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:39,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:39,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:39,458 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:39,459 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:39,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:39,472 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:39,488 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-03 08:57:39,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:39,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:39,622 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:39,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:57:39,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-10-03 08:57:39,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:57:39,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:57:39,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:57:39,645 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-10-03 08:57:39,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:39,791 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-03 08:57:39,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:57:39,793 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-10-03 08:57:39,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:39,794 INFO L225 Difference]: With dead ends: 13 [2018-10-03 08:57:39,794 INFO L226 Difference]: Without dead ends: 11 [2018-10-03 08:57:39,795 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 [2018-10-03 08:57:39,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-03 08:57:39,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-03 08:57:39,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-03 08:57:39,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-03 08:57:39,798 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-03 08:57:39,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:39,799 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-03 08:57:39,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:57:39,799 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-03 08:57:39,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-03 08:57:39,800 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:39,800 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2018-10-03 08:57:39,800 INFO L423 AbstractCegarLoop]: === Iteration 7 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:39,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:39,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1105147012, now seen corresponding path program 6 times [2018-10-03 08:57:39,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:39,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:39,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:39,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:39,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:39,811 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:39,811 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:39,811 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:39,820 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:39,840 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-03 08:57:39,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:39,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:40,095 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:40,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:57:40,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-10-03 08:57:40,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:57:40,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:57:40,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:57:40,117 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-10-03 08:57:40,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:40,310 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-03 08:57:40,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:57:40,311 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-03 08:57:40,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:40,312 INFO L225 Difference]: With dead ends: 14 [2018-10-03 08:57:40,312 INFO L226 Difference]: Without dead ends: 12 [2018-10-03 08:57:40,313 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 [2018-10-03 08:57:40,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-03 08:57:40,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-03 08:57:40,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-03 08:57:40,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-03 08:57:40,318 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-03 08:57:40,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:40,318 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-03 08:57:40,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:57:40,319 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-03 08:57:40,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:57:40,319 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:40,319 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1] [2018-10-03 08:57:40,320 INFO L423 AbstractCegarLoop]: === Iteration 8 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:40,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:40,320 INFO L82 PathProgramCache]: Analyzing trace with hash -100182971, now seen corresponding path program 7 times [2018-10-03 08:57:40,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:40,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:40,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:40,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:40,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:40,331 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:40,331 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:40,332 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:40,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:40,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:40,551 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:40,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:57:40,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-10-03 08:57:40,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:40,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:40,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:40,575 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-10-03 08:57:40,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:40,702 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-03 08:57:40,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:40,703 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-10-03 08:57:40,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:40,703 INFO L225 Difference]: With dead ends: 15 [2018-10-03 08:57:40,704 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 08:57:40,705 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 [2018-10-03 08:57:40,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 08:57:40,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-03 08:57:40,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-03 08:57:40,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-03 08:57:40,709 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-03 08:57:40,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:40,710 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-03 08:57:40,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:40,710 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-03 08:57:40,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-03 08:57:40,710 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:40,710 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2018-10-03 08:57:40,711 INFO L423 AbstractCegarLoop]: === Iteration 9 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:40,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:40,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1189293220, now seen corresponding path program 8 times [2018-10-03 08:57:40,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:40,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:40,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:40,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:40,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:40,724 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:40,724 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:40,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:40,735 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:40,755 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:40,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:40,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:40,939 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:57:40,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-03 08:57:40,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 08:57:40,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 08:57:40,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:57:40,941 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-10-03 08:57:41,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:41,087 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-03 08:57:41,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 08:57:41,088 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-10-03 08:57:41,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:41,089 INFO L225 Difference]: With dead ends: 16 [2018-10-03 08:57:41,089 INFO L226 Difference]: Without dead ends: 14 [2018-10-03 08:57:41,090 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 [2018-10-03 08:57:41,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-03 08:57:41,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-03 08:57:41,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-03 08:57:41,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-03 08:57:41,095 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-03 08:57:41,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:41,095 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-03 08:57:41,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 08:57:41,095 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-03 08:57:41,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:57:41,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:41,096 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1] [2018-10-03 08:57:41,096 INFO L423 AbstractCegarLoop]: === Iteration 10 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:41,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:41,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1786617819, now seen corresponding path program 9 times [2018-10-03 08:57:41,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:41,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:41,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:41,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:41,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:41,106 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:41,106 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:41,107 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:41,122 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:41,146 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-03 08:57:41,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:41,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:41,385 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:41,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:57:41,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-10-03 08:57:41,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 08:57:41,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 08:57:41,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:57:41,415 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-10-03 08:57:41,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:41,585 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-03 08:57:41,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 08:57:41,585 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-10-03 08:57:41,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:41,586 INFO L225 Difference]: With dead ends: 17 [2018-10-03 08:57:41,587 INFO L226 Difference]: Without dead ends: 15 [2018-10-03 08:57:41,588 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 [2018-10-03 08:57:41,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-03 08:57:41,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-03 08:57:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-03 08:57:41,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-03 08:57:41,593 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-03 08:57:41,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:41,593 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-03 08:57:41,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 08:57:41,593 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-03 08:57:41,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-03 08:57:41,594 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:41,594 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2018-10-03 08:57:41,594 INFO L423 AbstractCegarLoop]: === Iteration 11 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:41,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:41,594 INFO L82 PathProgramCache]: Analyzing trace with hash 449420484, now seen corresponding path program 10 times [2018-10-03 08:57:41,594 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:41,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:41,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:41,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:41,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:41,605 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:41,606 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:41,606 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:41,618 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:41,645 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:41,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:41,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:42,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:57:42,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-10-03 08:57:42,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 08:57:42,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 08:57:42,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:57:42,017 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-10-03 08:57:42,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:42,329 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-03 08:57:42,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 08:57:42,329 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-03 08:57:42,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:42,330 INFO L225 Difference]: With dead ends: 18 [2018-10-03 08:57:42,330 INFO L226 Difference]: Without dead ends: 16 [2018-10-03 08:57:42,331 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 [2018-10-03 08:57:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-03 08:57:42,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-03 08:57:42,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-03 08:57:42,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-03 08:57:42,335 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-03 08:57:42,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:42,335 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-03 08:57:42,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 08:57:42,336 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-03 08:57:42,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:57:42,336 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:42,336 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1] [2018-10-03 08:57:42,337 INFO L423 AbstractCegarLoop]: === Iteration 12 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:42,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:42,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1047131141, now seen corresponding path program 11 times [2018-10-03 08:57:42,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:42,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:42,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:42,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:42,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:42,349 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:42,350 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:42,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:42,358 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:42,393 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 08:57:42,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:42,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:42,703 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:42,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:57:42,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-10-03 08:57:42,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 08:57:42,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 08:57:42,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:57:42,728 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-10-03 08:57:42,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:42,955 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-03 08:57:42,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 08:57:42,955 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-10-03 08:57:42,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:42,956 INFO L225 Difference]: With dead ends: 19 [2018-10-03 08:57:42,957 INFO L226 Difference]: Without dead ends: 17 [2018-10-03 08:57:42,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:57:42,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-03 08:57:42,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-03 08:57:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-03 08:57:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-03 08:57:42,963 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-03 08:57:42,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:42,963 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-03 08:57:42,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 08:57:42,963 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-03 08:57:42,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-03 08:57:42,964 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:42,964 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1] [2018-10-03 08:57:42,964 INFO L423 AbstractCegarLoop]: === Iteration 13 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:42,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:42,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1898674972, now seen corresponding path program 12 times [2018-10-03 08:57:42,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:42,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:42,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:42,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:42,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:42,975 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:42,975 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:42,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:42,986 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:43,023 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:57:43,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:43,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:43,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:57:43,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-03 08:57:43,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 08:57:43,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 08:57:43,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:57:43,491 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-10-03 08:57:43,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:43,952 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-03 08:57:43,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 08:57:43,952 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-10-03 08:57:43,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:43,953 INFO L225 Difference]: With dead ends: 20 [2018-10-03 08:57:43,953 INFO L226 Difference]: Without dead ends: 18 [2018-10-03 08:57:43,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:57:43,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-03 08:57:43,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-03 08:57:43,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-03 08:57:43,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-03 08:57:43,959 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-03 08:57:43,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:43,959 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-03 08:57:43,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 08:57:43,959 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-03 08:57:43,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:57:43,960 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:43,960 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1] [2018-10-03 08:57:43,960 INFO L423 AbstractCegarLoop]: === Iteration 14 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:43,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:43,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1270616037, now seen corresponding path program 13 times [2018-10-03 08:57:43,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:43,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:43,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:43,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:43,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:43,971 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:43,971 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:43,972 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:43,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:44,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:44,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:57:44,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-10-03 08:57:44,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 08:57:44,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 08:57:44,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:57:44,349 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-10-03 08:57:44,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:44,865 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-03 08:57:44,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 08:57:44,865 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-10-03 08:57:44,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:44,866 INFO L225 Difference]: With dead ends: 21 [2018-10-03 08:57:44,867 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 08:57:44,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:57:44,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 08:57:44,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-03 08:57:44,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 08:57:44,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-03 08:57:44,872 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-03 08:57:44,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:44,873 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-03 08:57:44,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 08:57:44,873 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-03 08:57:44,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-03 08:57:44,874 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:44,874 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1] [2018-10-03 08:57:44,874 INFO L423 AbstractCegarLoop]: === Iteration 15 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:44,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:44,874 INFO L82 PathProgramCache]: Analyzing trace with hash 734389508, now seen corresponding path program 14 times [2018-10-03 08:57:44,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:44,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:44,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:44,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:44,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:44,886 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:44,886 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:44,886 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:44,904 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:44,964 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:44,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:44,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:45,387 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:57:45,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-03 08:57:45,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 08:57:45,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 08:57:45,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:57:45,388 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-10-03 08:57:45,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:45,725 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-03 08:57:45,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 08:57:45,726 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-03 08:57:45,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:45,727 INFO L225 Difference]: With dead ends: 22 [2018-10-03 08:57:45,727 INFO L226 Difference]: Without dead ends: 20 [2018-10-03 08:57:45,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:57:45,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-03 08:57:45,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-03 08:57:45,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:57:45,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-03 08:57:45,733 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-03 08:57:45,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:45,733 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-03 08:57:45,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 08:57:45,733 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-03 08:57:45,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:45,734 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:45,734 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1] [2018-10-03 08:57:45,734 INFO L423 AbstractCegarLoop]: === Iteration 16 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:45,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:45,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1291236293, now seen corresponding path program 15 times [2018-10-03 08:57:45,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:45,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:45,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:45,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:45,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:45,745 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:45,745 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:45,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:45,765 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:45,868 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:57:45,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:45,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:47,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:57:47,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-10-03 08:57:47,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 08:57:47,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 08:57:47,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:57:47,405 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-10-03 08:57:47,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:47,913 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-03 08:57:47,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 08:57:47,914 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-10-03 08:57:47,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:47,914 INFO L225 Difference]: With dead ends: 23 [2018-10-03 08:57:47,915 INFO L226 Difference]: Without dead ends: 21 [2018-10-03 08:57:47,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:57:47,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-03 08:57:47,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-03 08:57:47,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-03 08:57:47,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-03 08:57:47,921 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-03 08:57:47,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:47,922 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-03 08:57:47,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 08:57:47,922 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-03 08:57:47,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-03 08:57:47,922 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:47,923 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1] [2018-10-03 08:57:47,923 INFO L423 AbstractCegarLoop]: === Iteration 17 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:47,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:47,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1373617444, now seen corresponding path program 16 times [2018-10-03 08:57:47,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:47,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:47,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:47,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:47,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:47,933 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:47,933 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:47,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:47,945 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:48,023 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:48,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:48,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:48,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:57:48,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-03 08:57:48,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 08:57:48,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 08:57:48,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:57:48,343 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-10-03 08:57:48,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:48,702 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-03 08:57:48,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 08:57:48,703 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-10-03 08:57:48,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:48,704 INFO L225 Difference]: With dead ends: 24 [2018-10-03 08:57:48,704 INFO L226 Difference]: Without dead ends: 22 [2018-10-03 08:57:48,705 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 [2018-10-03 08:57:48,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-03 08:57:48,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-03 08:57:48,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:57:48,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-03 08:57:48,710 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-03 08:57:48,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:48,710 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-03 08:57:48,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 08:57:48,710 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-03 08:57:48,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-03 08:57:48,711 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:48,711 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1] [2018-10-03 08:57:48,711 INFO L423 AbstractCegarLoop]: === Iteration 18 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:48,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:48,711 INFO L82 PathProgramCache]: Analyzing trace with hash -367534171, now seen corresponding path program 17 times [2018-10-03 08:57:48,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:48,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:48,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:48,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:48,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:48,722 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:48,722 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:48,722 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:48,741 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:48,836 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-03 08:57:48,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:48,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:49,281 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:49,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:57:49,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-03 08:57:49,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 08:57:49,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 08:57:49,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:57:49,303 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-10-03 08:57:49,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:49,661 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-03 08:57:49,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 08:57:49,661 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-10-03 08:57:49,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:49,662 INFO L225 Difference]: With dead ends: 25 [2018-10-03 08:57:49,663 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 08:57:49,664 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 [2018-10-03 08:57:49,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 08:57:49,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-03 08:57:49,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-03 08:57:49,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-03 08:57:49,669 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-03 08:57:49,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:49,669 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-03 08:57:49,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 08:57:49,669 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-03 08:57:49,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-03 08:57:49,670 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:49,670 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1] [2018-10-03 08:57:49,670 INFO L423 AbstractCegarLoop]: === Iteration 19 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:49,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:49,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1491340612, now seen corresponding path program 18 times [2018-10-03 08:57:49,671 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:49,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:49,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:49,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:49,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:49,681 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:49,681 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:49,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:49,692 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:49,806 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-03 08:57:49,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:49,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:50,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:57:50,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-10-03 08:57:50,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 08:57:50,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 08:57:50,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:57:50,309 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-10-03 08:57:50,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:50,800 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-03 08:57:50,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 08:57:50,801 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-03 08:57:50,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:50,801 INFO L225 Difference]: With dead ends: 26 [2018-10-03 08:57:50,802 INFO L226 Difference]: Without dead ends: 24 [2018-10-03 08:57:50,802 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 [2018-10-03 08:57:50,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-03 08:57:50,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-03 08:57:50,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:57:50,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-03 08:57:50,807 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-03 08:57:50,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:50,807 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-03 08:57:50,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 08:57:50,807 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-03 08:57:50,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-03 08:57:50,808 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:50,808 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1] [2018-10-03 08:57:50,808 INFO L423 AbstractCegarLoop]: === Iteration 20 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:50,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:50,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1013083259, now seen corresponding path program 19 times [2018-10-03 08:57:50,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:50,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:50,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:50,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:50,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:50,818 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:50,818 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:50,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:50,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:50,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:51,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:57:51,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-03 08:57:51,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 08:57:51,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 08:57:51,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:57:51,495 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-10-03 08:57:52,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:52,142 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-03 08:57:52,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 08:57:52,143 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-10-03 08:57:52,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:52,144 INFO L225 Difference]: With dead ends: 27 [2018-10-03 08:57:52,144 INFO L226 Difference]: Without dead ends: 25 [2018-10-03 08:57:52,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:57:52,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-03 08:57:52,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-03 08:57:52,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-03 08:57:52,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-03 08:57:52,148 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-03 08:57:52,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:52,149 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-03 08:57:52,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 08:57:52,149 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-03 08:57:52,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-03 08:57:52,150 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:52,150 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1] [2018-10-03 08:57:52,150 INFO L423 AbstractCegarLoop]: === Iteration 21 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:52,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:52,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1340811932, now seen corresponding path program 20 times [2018-10-03 08:57:52,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:52,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:52,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:52,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:52,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:52,160 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:52,160 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:52,160 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:52,179 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:52,337 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:52,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:52,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:52,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:57:52,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-10-03 08:57:52,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 08:57:52,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 08:57:52,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:57:52,811 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-10-03 08:57:53,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:53,270 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-03 08:57:53,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 08:57:53,270 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-10-03 08:57:53,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:53,271 INFO L225 Difference]: With dead ends: 28 [2018-10-03 08:57:53,271 INFO L226 Difference]: Without dead ends: 26 [2018-10-03 08:57:53,272 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 [2018-10-03 08:57:53,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-03 08:57:53,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-03 08:57:53,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:57:53,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-03 08:57:53,277 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-03 08:57:53,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:53,277 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-03 08:57:53,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 08:57:53,278 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-03 08:57:53,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-03 08:57:53,278 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:53,278 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1] [2018-10-03 08:57:53,278 INFO L423 AbstractCegarLoop]: === Iteration 22 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:53,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:53,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1384501093, now seen corresponding path program 21 times [2018-10-03 08:57:53,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:53,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:53,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:53,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:53,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:53,288 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:53,288 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:53,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:53,305 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:53,505 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-03 08:57:53,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:53,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:54,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:57:54,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-03 08:57:54,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 08:57:54,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 08:57:54,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:57:54,271 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-10-03 08:57:55,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:55,002 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-03 08:57:55,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 08:57:55,005 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-10-03 08:57:55,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:55,006 INFO L225 Difference]: With dead ends: 29 [2018-10-03 08:57:55,006 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:57:55,006 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 [2018-10-03 08:57:55,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:57:55,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-03 08:57:55,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-03 08:57:55,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-03 08:57:55,010 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-03 08:57:55,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:55,010 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-03 08:57:55,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 08:57:55,011 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-03 08:57:55,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-03 08:57:55,011 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:55,011 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2018-10-03 08:57:55,011 INFO L423 AbstractCegarLoop]: === Iteration 23 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:55,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:55,012 INFO L82 PathProgramCache]: Analyzing trace with hash -30141052, now seen corresponding path program 22 times [2018-10-03 08:57:55,012 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:55,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:55,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:55,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:55,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:55,020 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:55,020 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:55,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:55,041 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:55,236 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:55,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:55,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:55,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:57:55,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-03 08:57:55,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 08:57:55,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 08:57:55,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:57:55,962 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-10-03 08:57:56,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:56,600 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-03 08:57:56,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 08:57:56,606 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-03 08:57:56,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:56,607 INFO L225 Difference]: With dead ends: 30 [2018-10-03 08:57:56,607 INFO L226 Difference]: Without dead ends: 28 [2018-10-03 08:57:56,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:57:56,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-03 08:57:56,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-03 08:57:56,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:57:56,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-03 08:57:56,618 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-03 08:57:56,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:56,618 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-03 08:57:56,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 08:57:56,618 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-03 08:57:56,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-03 08:57:56,619 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:56,619 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1] [2018-10-03 08:57:56,621 INFO L423 AbstractCegarLoop]: === Iteration 24 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:56,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:56,621 INFO L82 PathProgramCache]: Analyzing trace with hash -934374587, now seen corresponding path program 23 times [2018-10-03 08:57:56,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:56,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:56,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:56,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:56,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:56,632 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:56,632 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:56,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:56,646 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:56,894 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-03 08:57:56,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:56,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:57,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:57:57,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-10-03 08:57:57,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 08:57:57,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 08:57:57,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:57:57,414 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-10-03 08:57:58,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:58,073 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-03 08:57:58,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 08:57:58,074 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-10-03 08:57:58,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:58,075 INFO L225 Difference]: With dead ends: 31 [2018-10-03 08:57:58,075 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:57:58,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:57:58,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:57:58,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-03 08:57:58,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-03 08:57:58,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-03 08:57:58,081 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-03 08:57:58,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:58,081 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-03 08:57:58,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 08:57:58,081 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-03 08:57:58,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-03 08:57:58,082 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:58,082 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1] [2018-10-03 08:57:58,082 INFO L423 AbstractCegarLoop]: === Iteration 25 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:57:58,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:58,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1099156900, now seen corresponding path program 24 times [2018-10-03 08:57:58,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:58,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:58,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:58,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:58,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:58,090 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:57:58,091 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:57:58,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:57:58,108 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:58,380 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-03 08:57:58,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:58,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:59,466 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:59,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:57:59,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-10-03 08:57:59,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 08:57:59,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 08:57:59,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:57:59,488 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-10-03 08:58:00,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:00,133 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-03 08:58:00,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 08:58:00,134 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-10-03 08:58:00,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:00,134 INFO L225 Difference]: With dead ends: 32 [2018-10-03 08:58:00,135 INFO L226 Difference]: Without dead ends: 30 [2018-10-03 08:58:00,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:58:00,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-03 08:58:00,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-03 08:58:00,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:58:00,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-03 08:58:00,140 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-03 08:58:00,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:00,140 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-03 08:58:00,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 08:58:00,141 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-03 08:58:00,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-03 08:58:00,141 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:00,141 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1] [2018-10-03 08:58:00,141 INFO L423 AbstractCegarLoop]: === Iteration 26 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:58:00,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:00,142 INFO L82 PathProgramCache]: Analyzing trace with hash -285876443, now seen corresponding path program 25 times [2018-10-03 08:58:00,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:00,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:00,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:00,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:00,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:00,149 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:58:00,150 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:58:00,150 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 [2018-10-03 08:58:00,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:00,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:01,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:58:01,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-03 08:58:01,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 08:58:01,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 08:58:01,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:58:01,158 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-10-03 08:58:01,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:01,806 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-03 08:58:01,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 08:58:01,806 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-10-03 08:58:01,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:01,807 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:58:01,807 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:58:01,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:58:01,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:58:01,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-03 08:58:01,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 08:58:01,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-03 08:58:01,812 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-03 08:58:01,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:01,813 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-03 08:58:01,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 08:58:01,813 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-03 08:58:01,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-03 08:58:01,813 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:01,813 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1] [2018-10-03 08:58:01,813 INFO L423 AbstractCegarLoop]: === Iteration 27 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:58:01,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:01,814 INFO L82 PathProgramCache]: Analyzing trace with hash -272237116, now seen corresponding path program 26 times [2018-10-03 08:58:01,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:01,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:01,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:01,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:01,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:01,821 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:58:01,821 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:58:01,821 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:58:01,835 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:58:02,215 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:58:02,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:02,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:04,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:58:04,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-03 08:58:04,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 08:58:04,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 08:58:04,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:58:04,010 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-10-03 08:58:04,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:04,673 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-03 08:58:04,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 08:58:04,673 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-03 08:58:04,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:04,674 INFO L225 Difference]: With dead ends: 34 [2018-10-03 08:58:04,674 INFO L226 Difference]: Without dead ends: 32 [2018-10-03 08:58:04,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:58:04,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-03 08:58:04,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-03 08:58:04,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:58:04,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-03 08:58:04,680 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-03 08:58:04,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:04,680 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-03 08:58:04,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 08:58:04,681 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-03 08:58:04,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-03 08:58:04,681 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:04,681 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1] [2018-10-03 08:58:04,682 INFO L423 AbstractCegarLoop]: === Iteration 28 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:58:04,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:04,682 INFO L82 PathProgramCache]: Analyzing trace with hash 150582021, now seen corresponding path program 27 times [2018-10-03 08:58:04,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:04,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:04,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:04,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:04,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:04,690 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:58:04,691 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:58:04,691 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 [2018-10-03 08:58:04,710 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:58:05,153 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-03 08:58:05,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:05,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:05,921 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:05,941 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:58:05,941 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-03 08:58:05,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 08:58:05,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 08:58:05,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:58:05,942 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-10-03 08:58:06,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:06,704 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-03 08:58:06,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 08:58:06,705 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-10-03 08:58:06,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:06,705 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:58:06,706 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:58:06,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:58:06,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:58:06,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-03 08:58:06,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-03 08:58:06,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-03 08:58:06,713 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-03 08:58:06,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:06,713 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-03 08:58:06,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 08:58:06,713 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-03 08:58:06,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-03 08:58:06,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:06,714 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1] [2018-10-03 08:58:06,715 INFO L423 AbstractCegarLoop]: === Iteration 29 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:58:06,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:06,715 INFO L82 PathProgramCache]: Analyzing trace with hash 373073380, now seen corresponding path program 28 times [2018-10-03 08:58:06,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:06,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:06,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:06,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:06,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:06,724 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:58:06,724 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:58:06,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:58:06,734 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:58:07,242 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:58:07,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:07,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:07,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:58:07,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-10-03 08:58:07,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 08:58:07,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 08:58:07,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:58:07,905 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-10-03 08:58:08,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:08,689 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-03 08:58:08,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 08:58:08,689 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-10-03 08:58:08,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:08,690 INFO L225 Difference]: With dead ends: 36 [2018-10-03 08:58:08,690 INFO L226 Difference]: Without dead ends: 34 [2018-10-03 08:58:08,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:58:08,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-03 08:58:08,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-03 08:58:08,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:58:08,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-03 08:58:08,702 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-03 08:58:08,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:08,702 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-03 08:58:08,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 08:58:08,702 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-03 08:58:08,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-03 08:58:08,703 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:08,703 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1] [2018-10-03 08:58:08,703 INFO L423 AbstractCegarLoop]: === Iteration 30 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:58:08,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:08,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1319629083, now seen corresponding path program 29 times [2018-10-03 08:58:08,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:08,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:08,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:08,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:08,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:08,713 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:58:08,713 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:58:08,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:58:08,726 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:58:09,226 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-03 08:58:09,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:09,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:09,928 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:09,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:58:09,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-03 08:58:09,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-03 08:58:09,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-03 08:58:09,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:58:09,949 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-10-03 08:58:10,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:10,838 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-03 08:58:10,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 08:58:10,838 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-10-03 08:58:10,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:10,839 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:58:10,839 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:58:10,840 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 [2018-10-03 08:58:10,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:58:10,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-03 08:58:10,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-03 08:58:10,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-03 08:58:10,845 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-03 08:58:10,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:10,845 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-03 08:58:10,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-03 08:58:10,845 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-03 08:58:10,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-03 08:58:10,846 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:10,846 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1] [2018-10-03 08:58:10,846 INFO L423 AbstractCegarLoop]: === Iteration 31 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:58:10,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:10,846 INFO L82 PathProgramCache]: Analyzing trace with hash 2041169412, now seen corresponding path program 30 times [2018-10-03 08:58:10,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:10,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:10,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:10,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:10,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:10,853 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:58:10,854 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:58:10,854 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:58:10,866 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:58:11,406 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-03 08:58:11,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:11,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:12,171 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:58:12,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-03 08:58:12,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 08:58:12,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 08:58:12,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:58:12,173 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-10-03 08:58:13,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:13,043 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-03 08:58:13,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 08:58:13,043 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-03 08:58:13,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:13,044 INFO L225 Difference]: With dead ends: 38 [2018-10-03 08:58:13,044 INFO L226 Difference]: Without dead ends: 36 [2018-10-03 08:58:13,045 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 [2018-10-03 08:58:13,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-03 08:58:13,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-03 08:58:13,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-03 08:58:13,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-03 08:58:13,050 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-03 08:58:13,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:13,050 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-03 08:58:13,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 08:58:13,051 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-03 08:58:13,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-03 08:58:13,051 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:13,051 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1] [2018-10-03 08:58:13,051 INFO L423 AbstractCegarLoop]: === Iteration 32 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:58:13,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:13,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1148259643, now seen corresponding path program 31 times [2018-10-03 08:58:13,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:13,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:13,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:13,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:13,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:13,061 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:58:13,061 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:58:13,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:58:13,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:13,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:14,519 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:58:14,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-10-03 08:58:14,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 08:58:14,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 08:58:14,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:58:14,521 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-10-03 08:58:15,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:15,482 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-03 08:58:15,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 08:58:15,482 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-10-03 08:58:15,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:15,483 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:58:15,483 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:58:15,484 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 [2018-10-03 08:58:15,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:58:15,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-03 08:58:15,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-03 08:58:15,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-03 08:58:15,489 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-03 08:58:15,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:15,489 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-03 08:58:15,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 08:58:15,489 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-03 08:58:15,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-03 08:58:15,490 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:15,490 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1] [2018-10-03 08:58:15,490 INFO L423 AbstractCegarLoop]: === Iteration 33 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:58:15,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:15,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1236312540, now seen corresponding path program 32 times [2018-10-03 08:58:15,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:15,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:15,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:15,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:15,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:15,496 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:58:15,497 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:58:15,497 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:58:15,511 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:58:16,195 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:58:16,195 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:16,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:16,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:58:16,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-10-03 08:58:16,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 08:58:16,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 08:58:16,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:58:16,970 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-10-03 08:58:18,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:18,036 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-03 08:58:18,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 08:58:18,036 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-10-03 08:58:18,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:18,037 INFO L225 Difference]: With dead ends: 40 [2018-10-03 08:58:18,037 INFO L226 Difference]: Without dead ends: 38 [2018-10-03 08:58:18,038 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 [2018-10-03 08:58:18,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-03 08:58:18,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-03 08:58:18,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-03 08:58:18,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-03 08:58:18,042 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-03 08:58:18,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:18,042 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-03 08:58:18,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 08:58:18,042 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-03 08:58:18,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-03 08:58:18,043 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:18,043 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1] [2018-10-03 08:58:18,043 INFO L423 AbstractCegarLoop]: === Iteration 34 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:58:18,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:18,044 INFO L82 PathProgramCache]: Analyzing trace with hash 329014949, now seen corresponding path program 33 times [2018-10-03 08:58:18,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:18,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:18,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:18,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:18,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:18,050 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:58:18,050 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:58:18,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:58:18,067 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:58:18,759 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-03 08:58:18,759 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:18,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:19,611 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:19,631 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:58:19,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-03 08:58:19,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-03 08:58:19,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-03 08:58:19,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:58:19,632 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-10-03 08:58:20,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:20,655 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-03 08:58:20,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 08:58:20,656 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-10-03 08:58:20,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:20,656 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:58:20,656 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:58:20,657 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 [2018-10-03 08:58:20,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:58:20,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-03 08:58:20,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-03 08:58:20,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-03 08:58:20,661 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-03 08:58:20,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:20,662 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-03 08:58:20,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-03 08:58:20,662 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-03 08:58:20,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 08:58:20,662 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:20,663 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1] [2018-10-03 08:58:20,663 INFO L423 AbstractCegarLoop]: === Iteration 35 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:58:20,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:20,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1609526852, now seen corresponding path program 34 times [2018-10-03 08:58:20,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:20,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:20,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:20,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:20,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:20,670 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:58:20,670 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:58:20,670 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:58:20,677 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:58:21,429 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:58:21,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:21,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:22,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:58:22,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-03 08:58:22,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 08:58:22,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 08:58:22,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:58:22,309 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-10-03 08:58:23,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:23,370 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-03 08:58:23,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 08:58:23,370 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-03 08:58:23,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:23,371 INFO L225 Difference]: With dead ends: 42 [2018-10-03 08:58:23,371 INFO L226 Difference]: Without dead ends: 40 [2018-10-03 08:58:23,373 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 [2018-10-03 08:58:23,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-03 08:58:23,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-03 08:58:23,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-03 08:58:23,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-03 08:58:23,379 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-03 08:58:23,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:23,379 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-03 08:58:23,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 08:58:23,379 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-03 08:58:23,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-03 08:58:23,380 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:23,380 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1] [2018-10-03 08:58:23,380 INFO L423 AbstractCegarLoop]: === Iteration 36 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:58:23,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:23,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1644277115, now seen corresponding path program 35 times [2018-10-03 08:58:23,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:23,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:23,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:23,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:23,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:23,388 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:58:23,389 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:58:23,389 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:58:23,404 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:58:24,358 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-03 08:58:24,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:24,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:25,394 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:58:25,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-03 08:58:25,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-03 08:58:25,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-03 08:58:25,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:58:25,396 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-10-03 08:58:26,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:26,573 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-03 08:58:26,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 08:58:26,574 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-10-03 08:58:26,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:26,575 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:58:26,575 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:58:26,576 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 [2018-10-03 08:58:26,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:58:26,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-03 08:58:26,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-03 08:58:26,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-03 08:58:26,580 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-03 08:58:26,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:26,580 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-03 08:58:26,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-03 08:58:26,580 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-03 08:58:26,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-03 08:58:26,581 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:26,581 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1] [2018-10-03 08:58:26,581 INFO L423 AbstractCegarLoop]: === Iteration 37 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:58:26,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:26,581 INFO L82 PathProgramCache]: Analyzing trace with hash 567015012, now seen corresponding path program 36 times [2018-10-03 08:58:26,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:26,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:26,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:26,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:26,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:26,588 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:58:26,588 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:58:26,588 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:58:26,605 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:58:27,595 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-03 08:58:27,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:27,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:28,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:58:28,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-10-03 08:58:28,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 08:58:28,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 08:58:28,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:58:28,573 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-10-03 08:58:29,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:29,759 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-03 08:58:29,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 08:58:29,767 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-10-03 08:58:29,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:29,767 INFO L225 Difference]: With dead ends: 44 [2018-10-03 08:58:29,767 INFO L226 Difference]: Without dead ends: 42 [2018-10-03 08:58:29,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:58:29,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-03 08:58:29,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-03 08:58:29,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-03 08:58:29,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-03 08:58:29,772 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-03 08:58:29,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:29,772 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-03 08:58:29,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 08:58:29,772 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-03 08:58:29,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-03 08:58:29,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:29,773 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1] [2018-10-03 08:58:29,773 INFO L423 AbstractCegarLoop]: === Iteration 38 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:58:29,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:29,773 INFO L82 PathProgramCache]: Analyzing trace with hash 397594213, now seen corresponding path program 37 times [2018-10-03 08:58:29,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:29,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:29,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:29,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:29,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:29,780 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:58:29,780 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:58:29,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:58:29,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:30,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:31,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:58:31,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-03 08:58:31,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 08:58:31,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 08:58:31,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:58:31,874 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-10-03 08:58:33,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:33,140 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-03 08:58:33,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 08:58:33,140 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-10-03 08:58:33,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:33,141 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:58:33,141 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:58:33,142 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 [2018-10-03 08:58:33,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:58:33,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-03 08:58:33,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-03 08:58:33,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-03 08:58:33,146 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-03 08:58:33,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:33,147 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-03 08:58:33,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 08:58:33,147 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-03 08:58:33,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-03 08:58:33,147 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:33,147 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1] [2018-10-03 08:58:33,147 INFO L423 AbstractCegarLoop]: === Iteration 39 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:58:33,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:33,148 INFO L82 PathProgramCache]: Analyzing trace with hash -559483260, now seen corresponding path program 38 times [2018-10-03 08:58:33,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:33,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:33,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:33,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:33,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:33,154 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:58:33,154 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:58:33,154 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 [2018-10-03 08:58:33,168 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:58:34,160 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:58:34,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:34,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:35,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:58:35,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-03 08:58:35,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 08:58:35,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 08:58:35,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:58:35,233 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-10-03 08:58:36,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:36,541 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-03 08:58:36,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 08:58:36,542 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-10-03 08:58:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:36,543 INFO L225 Difference]: With dead ends: 46 [2018-10-03 08:58:36,543 INFO L226 Difference]: Without dead ends: 44 [2018-10-03 08:58:36,544 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 [2018-10-03 08:58:36,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-03 08:58:36,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-03 08:58:36,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-03 08:58:36,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-03 08:58:36,548 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-03 08:58:36,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:36,548 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-03 08:58:36,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 08:58:36,548 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-03 08:58:36,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-03 08:58:36,548 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:36,549 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1] [2018-10-03 08:58:36,549 INFO L423 AbstractCegarLoop]: === Iteration 40 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:58:36,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:36,549 INFO L82 PathProgramCache]: Analyzing trace with hash -164113851, now seen corresponding path program 39 times [2018-10-03 08:58:36,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:36,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:36,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:36,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:36,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:36,556 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:58:36,556 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:58:36,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:58:36,565 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:58:37,785 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-03 08:58:37,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:37,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:38,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:58:38,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-03 08:58:38,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 08:58:38,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 08:58:38,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:58:38,849 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-10-03 08:58:40,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:40,223 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-03 08:58:40,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 08:58:40,223 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-10-03 08:58:40,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:40,224 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:58:40,224 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:58:40,225 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 [2018-10-03 08:58:40,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:58:40,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-03 08:58:40,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-03 08:58:40,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-03 08:58:40,229 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-03 08:58:40,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:40,229 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-03 08:58:40,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 08:58:40,229 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-03 08:58:40,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-03 08:58:40,230 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:40,230 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1] [2018-10-03 08:58:40,230 INFO L423 AbstractCegarLoop]: === Iteration 41 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:58:40,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:40,230 INFO L82 PathProgramCache]: Analyzing trace with hash -792564060, now seen corresponding path program 40 times [2018-10-03 08:58:40,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:40,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:40,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:40,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:40,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:40,236 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:58:40,236 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:58:40,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:58:40,251 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:58:41,843 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:58:41,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:41,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:43,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:58:43,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-10-03 08:58:43,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 08:58:43,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 08:58:43,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:58:43,025 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-10-03 08:58:44,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:44,456 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-03 08:58:44,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 08:58:44,457 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-10-03 08:58:44,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:44,457 INFO L225 Difference]: With dead ends: 48 [2018-10-03 08:58:44,457 INFO L226 Difference]: Without dead ends: 46 [2018-10-03 08:58:44,459 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 [2018-10-03 08:58:44,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-03 08:58:44,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-03 08:58:44,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-03 08:58:44,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-03 08:58:44,462 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-03 08:58:44,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:44,462 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-03 08:58:44,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 08:58:44,462 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-03 08:58:44,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-03 08:58:44,463 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:44,463 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1] [2018-10-03 08:58:44,463 INFO L423 AbstractCegarLoop]: === Iteration 42 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:58:44,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:44,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1200315941, now seen corresponding path program 41 times [2018-10-03 08:58:44,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:44,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:44,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:44,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:44,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:44,469 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:58:44,470 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:58:44,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:58:44,478 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:58:46,010 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-03 08:58:46,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:46,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:47,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:58:47,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-03 08:58:47,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-03 08:58:47,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-03 08:58:47,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:58:47,152 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-10-03 08:58:48,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:48,654 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-03 08:58:48,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 08:58:48,654 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-10-03 08:58:48,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:48,655 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:58:48,655 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:58:48,656 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 [2018-10-03 08:58:48,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:58:48,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-03 08:58:48,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-03 08:58:48,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-03 08:58:48,660 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-03 08:58:48,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:48,660 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-03 08:58:48,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-03 08:58:48,660 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-03 08:58:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-03 08:58:48,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:48,661 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1] [2018-10-03 08:58:48,661 INFO L423 AbstractCegarLoop]: === Iteration 43 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:58:48,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:48,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1444913468, now seen corresponding path program 42 times [2018-10-03 08:58:48,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:48,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:48,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:48,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:48,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:48,668 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:58:48,668 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:58:48,668 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:58:48,680 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:58:50,448 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-03 08:58:50,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:50,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:51,647 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:51,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:58:51,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-10-03 08:58:51,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 08:58:51,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 08:58:51,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:58:51,669 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-10-03 08:58:53,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:53,205 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-03 08:58:53,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 08:58:53,206 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-10-03 08:58:53,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:53,206 INFO L225 Difference]: With dead ends: 50 [2018-10-03 08:58:53,206 INFO L226 Difference]: Without dead ends: 48 [2018-10-03 08:58:53,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:58:53,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-03 08:58:53,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-03 08:58:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-03 08:58:53,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-03 08:58:53,213 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-03 08:58:53,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:53,213 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-03 08:58:53,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 08:58:53,214 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-03 08:58:53,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-03 08:58:53,214 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:53,214 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1] [2018-10-03 08:58:53,214 INFO L423 AbstractCegarLoop]: === Iteration 44 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:58:53,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:53,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1842646523, now seen corresponding path program 43 times [2018-10-03 08:58:53,214 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:53,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:53,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:53,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:53,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:53,220 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:58:53,220 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:58:53,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:58:53,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:54,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:56,098 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:58:56,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-03 08:58:56,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 08:58:56,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 08:58:56,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:58:56,099 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-10-03 08:58:57,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:57,668 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-03 08:58:57,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 08:58:57,668 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-10-03 08:58:57,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:57,669 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:58:57,669 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:58:57,670 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 [2018-10-03 08:58:57,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:58:57,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-03 08:58:57,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-03 08:58:57,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-03 08:58:57,675 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-03 08:58:57,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:57,675 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-03 08:58:57,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 08:58:57,675 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-03 08:58:57,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-03 08:58:57,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:57,676 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1] [2018-10-03 08:58:57,676 INFO L423 AbstractCegarLoop]: === Iteration 45 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:58:57,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:57,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1287469340, now seen corresponding path program 44 times [2018-10-03 08:58:57,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:57,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:57,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:57,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:57,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:57,683 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:58:57,683 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:58:57,683 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:58:57,698 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:58:59,376 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:58:59,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:59,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:00,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:59:00,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-10-03 08:59:00,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 08:59:00,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 08:59:00,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:59:00,651 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-10-03 08:59:02,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:02,275 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-03 08:59:02,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 08:59:02,276 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-10-03 08:59:02,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:02,277 INFO L225 Difference]: With dead ends: 52 [2018-10-03 08:59:02,277 INFO L226 Difference]: Without dead ends: 50 [2018-10-03 08:59:02,277 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 [2018-10-03 08:59:02,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-03 08:59:02,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-03 08:59:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-03 08:59:02,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-03 08:59:02,281 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-03 08:59:02,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:02,282 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-03 08:59:02,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 08:59:02,282 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-03 08:59:02,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-03 08:59:02,282 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:02,282 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1] [2018-10-03 08:59:02,283 INFO L423 AbstractCegarLoop]: === Iteration 46 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:59:02,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:02,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1256845851, now seen corresponding path program 45 times [2018-10-03 08:59:02,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:02,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:02,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:02,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:02,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:02,289 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:59:02,289 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:59:02,289 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:59:02,296 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:59:04,398 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-03 08:59:04,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:04,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:05,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:59:05,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-03 08:59:05,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-03 08:59:05,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-03 08:59:05,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:59:05,775 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-10-03 08:59:07,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:07,469 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-03 08:59:07,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 08:59:07,470 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-10-03 08:59:07,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:07,470 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:59:07,471 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:59:07,471 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 [2018-10-03 08:59:07,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:59:07,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-03 08:59:07,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-03 08:59:07,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-03 08:59:07,475 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-03 08:59:07,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:07,476 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-03 08:59:07,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-03 08:59:07,476 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-03 08:59:07,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-03 08:59:07,476 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:07,476 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2018-10-03 08:59:07,476 INFO L423 AbstractCegarLoop]: === Iteration 47 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:59:07,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:07,477 INFO L82 PathProgramCache]: Analyzing trace with hash -307517692, now seen corresponding path program 46 times [2018-10-03 08:59:07,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:07,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:07,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:07,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:07,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:07,483 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:59:07,483 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:59:07,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:59:07,492 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:59:09,827 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:59:09,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:09,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:11,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:59:11,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-10-03 08:59:11,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 08:59:11,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 08:59:11,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:59:11,198 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-10-03 08:59:12,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:12,964 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-03 08:59:12,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 08:59:12,964 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-10-03 08:59:12,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:12,965 INFO L225 Difference]: With dead ends: 54 [2018-10-03 08:59:12,965 INFO L226 Difference]: Without dead ends: 52 [2018-10-03 08:59:12,966 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 [2018-10-03 08:59:12,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-03 08:59:12,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-03 08:59:12,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-03 08:59:12,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-03 08:59:12,970 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-03 08:59:12,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:12,971 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-03 08:59:12,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 08:59:12,971 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-03 08:59:12,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-03 08:59:12,971 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:12,971 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1] [2018-10-03 08:59:12,971 INFO L423 AbstractCegarLoop]: === Iteration 48 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:59:12,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:12,971 INFO L82 PathProgramCache]: Analyzing trace with hash -943115835, now seen corresponding path program 47 times [2018-10-03 08:59:12,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:12,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:12,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:12,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:12,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:12,978 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:59:12,978 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:59:12,978 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:59:12,993 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:59:15,856 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-03 08:59:15,856 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:15,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:17,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:59:17,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-10-03 08:59:17,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-03 08:59:17,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-03 08:59:17,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:59:17,386 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-10-03 08:59:19,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:19,216 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-03 08:59:19,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 08:59:19,216 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-10-03 08:59:19,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:19,217 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:59:19,217 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:59:19,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:59:19,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:59:19,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-03 08:59:19,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-03 08:59:19,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-03 08:59:19,223 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-03 08:59:19,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:19,223 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-03 08:59:19,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-03 08:59:19,223 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-03 08:59:19,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-03 08:59:19,224 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:19,224 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1] [2018-10-03 08:59:19,224 INFO L423 AbstractCegarLoop]: === Iteration 49 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:59:19,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:19,224 INFO L82 PathProgramCache]: Analyzing trace with hash 828178212, now seen corresponding path program 48 times [2018-10-03 08:59:19,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:19,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:19,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:19,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:19,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:19,231 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:59:19,231 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:59:19,231 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:59:19,239 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:59:21,987 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-03 08:59:21,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:21,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:23,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:59:23,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-10-03 08:59:23,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 08:59:23,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 08:59:23,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:59:23,436 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-10-03 08:59:25,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:25,346 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-03 08:59:25,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 08:59:25,347 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-10-03 08:59:25,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:25,348 INFO L225 Difference]: With dead ends: 56 [2018-10-03 08:59:25,348 INFO L226 Difference]: Without dead ends: 54 [2018-10-03 08:59:25,350 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 [2018-10-03 08:59:25,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-03 08:59:25,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-03 08:59:25,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-03 08:59:25,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-03 08:59:25,355 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-03 08:59:25,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:25,355 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-03 08:59:25,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 08:59:25,355 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-03 08:59:25,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-03 08:59:25,356 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:25,356 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1] [2018-10-03 08:59:25,356 INFO L423 AbstractCegarLoop]: === Iteration 50 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:59:25,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:25,356 INFO L82 PathProgramCache]: Analyzing trace with hash -96281179, now seen corresponding path program 49 times [2018-10-03 08:59:25,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:25,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:25,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:25,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:25,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:25,362 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:59:25,363 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:59:25,363 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) [2018-10-03 08:59:25,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:59:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:27,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:29,830 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:59:29,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-03 08:59:29,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 08:59:29,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 08:59:29,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:59:29,831 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-10-03 08:59:31,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:31,802 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-03 08:59:31,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 08:59:31,804 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-10-03 08:59:31,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:31,805 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:59:31,805 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:59:31,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:59:31,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:59:31,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-03 08:59:31,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-03 08:59:31,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-03 08:59:31,812 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-03 08:59:31,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:31,812 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-03 08:59:31,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 08:59:31,812 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-03 08:59:31,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-03 08:59:31,813 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:31,813 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1] [2018-10-03 08:59:31,813 INFO L423 AbstractCegarLoop]: === Iteration 51 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:59:31,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:31,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1310248772, now seen corresponding path program 50 times [2018-10-03 08:59:31,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:31,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:31,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:31,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:59:31,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:31,820 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:59:31,820 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:59:31,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:59:31,831 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:59:34,502 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:59:34,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:34,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:36,105 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:59:36,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-10-03 08:59:36,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 08:59:36,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 08:59:36,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:59:36,106 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-10-03 08:59:38,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:38,182 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-03 08:59:38,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 08:59:38,182 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-10-03 08:59:38,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:38,183 INFO L225 Difference]: With dead ends: 58 [2018-10-03 08:59:38,184 INFO L226 Difference]: Without dead ends: 56 [2018-10-03 08:59:38,184 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 [2018-10-03 08:59:38,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-03 08:59:38,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-03 08:59:38,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-03 08:59:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-03 08:59:38,188 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-03 08:59:38,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:38,188 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-03 08:59:38,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 08:59:38,188 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-03 08:59:38,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-03 08:59:38,189 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:38,189 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1] [2018-10-03 08:59:38,189 INFO L423 AbstractCegarLoop]: === Iteration 52 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:59:38,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:38,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1963004293, now seen corresponding path program 51 times [2018-10-03 08:59:38,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:38,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:38,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:38,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:38,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:38,197 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:59:38,197 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:59:38,197 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 [2018-10-03 08:59:38,217 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:59:41,471 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-03 08:59:41,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:41,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:43,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:59:43,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-03 08:59:43,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-03 08:59:43,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-03 08:59:43,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:59:43,096 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-10-03 08:59:45,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:45,280 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-03 08:59:45,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 08:59:45,280 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-10-03 08:59:45,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:45,281 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:59:45,281 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:59:45,282 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 [2018-10-03 08:59:45,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:59:45,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-03 08:59:45,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-03 08:59:45,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-03 08:59:45,287 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-03 08:59:45,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:45,287 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-03 08:59:45,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-03 08:59:45,287 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-03 08:59:45,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-03 08:59:45,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:45,287 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1] [2018-10-03 08:59:45,288 INFO L423 AbstractCegarLoop]: === Iteration 53 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:59:45,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:45,288 INFO L82 PathProgramCache]: Analyzing trace with hash 723588964, now seen corresponding path program 52 times [2018-10-03 08:59:45,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:45,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:45,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:45,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:45,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:45,295 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:59:45,295 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:59:45,295 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:59:45,303 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:59:48,509 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:59:48,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:48,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:50,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:59:50,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-10-03 08:59:50,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 08:59:50,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 08:59:50,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:59:50,209 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-10-03 08:59:52,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:52,412 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-03 08:59:52,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 08:59:52,412 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-10-03 08:59:52,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:52,413 INFO L225 Difference]: With dead ends: 60 [2018-10-03 08:59:52,413 INFO L226 Difference]: Without dead ends: 58 [2018-10-03 08:59:52,414 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 [2018-10-03 08:59:52,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-03 08:59:52,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-03 08:59:52,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-03 08:59:52,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-03 08:59:52,418 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-03 08:59:52,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:52,418 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-03 08:59:52,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 08:59:52,418 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-03 08:59:52,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-03 08:59:52,418 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:52,418 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1] [2018-10-03 08:59:52,419 INFO L423 AbstractCegarLoop]: === Iteration 54 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 08:59:52,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:52,419 INFO L82 PathProgramCache]: Analyzing trace with hash 956419429, now seen corresponding path program 53 times [2018-10-03 08:59:52,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:52,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:52,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:52,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:52,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:52,425 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 08:59:52,426 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 08:59:52,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 08:59:52,438 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:59:56,409 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-03 08:59:56,409 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:56,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:58,129 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 08:59:58,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-03 08:59:58,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-03 08:59:58,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-03 08:59:58,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:59:58,130 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-10-03 09:00:00,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:00,440 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-03 09:00:00,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-03 09:00:00,441 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-10-03 09:00:00,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:00,442 INFO L225 Difference]: With dead ends: 61 [2018-10-03 09:00:00,442 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 09:00:00,442 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 [2018-10-03 09:00:00,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 09:00:00,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-03 09:00:00,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-03 09:00:00,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-03 09:00:00,447 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-03 09:00:00,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:00,447 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-03 09:00:00,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-03 09:00:00,447 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-03 09:00:00,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-03 09:00:00,447 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:00,447 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1] [2018-10-03 09:00:00,447 INFO L423 AbstractCegarLoop]: === Iteration 55 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:00:00,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:00,448 INFO L82 PathProgramCache]: Analyzing trace with hash -415770748, now seen corresponding path program 54 times [2018-10-03 09:00:00,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:00,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:00,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:00,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:00:00,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:00,454 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:00:00,454 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:00:00,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 09:00:00,469 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:00:04,792 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-03 09:00:04,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:00:04,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:06,579 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:00:06,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-10-03 09:00:06,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-03 09:00:06,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-03 09:00:06,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 09:00:06,581 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-10-03 09:00:08,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:08,959 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-03 09:00:08,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-03 09:00:08,959 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-10-03 09:00:08,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:08,960 INFO L225 Difference]: With dead ends: 62 [2018-10-03 09:00:08,960 INFO L226 Difference]: Without dead ends: 60 [2018-10-03 09:00:08,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 09:00:08,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-03 09:00:08,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-03 09:00:08,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-03 09:00:08,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-03 09:00:08,966 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-03 09:00:08,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:08,966 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-03 09:00:08,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-03 09:00:08,966 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-03 09:00:08,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-03 09:00:08,966 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:08,966 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1] [2018-10-03 09:00:08,967 INFO L423 AbstractCegarLoop]: === Iteration 56 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:00:08,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:08,967 INFO L82 PathProgramCache]: Analyzing trace with hash -3993275, now seen corresponding path program 55 times [2018-10-03 09:00:08,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:08,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:08,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:08,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:00:08,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:08,973 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:00:08,973 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:00:08,973 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 09:00:08,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:00:12,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:12,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:14,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:00:14,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-03 09:00:14,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 09:00:14,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 09:00:14,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 09:00:14,630 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-10-03 09:00:17,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:17,072 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-03 09:00:17,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 09:00:17,073 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-10-03 09:00:17,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:17,074 INFO L225 Difference]: With dead ends: 63 [2018-10-03 09:00:17,074 INFO L226 Difference]: Without dead ends: 61 [2018-10-03 09:00:17,074 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 [2018-10-03 09:00:17,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-03 09:00:17,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-03 09:00:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-03 09:00:17,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-03 09:00:17,081 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-03 09:00:17,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:17,081 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-03 09:00:17,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 09:00:17,081 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-03 09:00:17,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-03 09:00:17,082 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:17,082 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1] [2018-10-03 09:00:17,082 INFO L423 AbstractCegarLoop]: === Iteration 57 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:00:17,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:17,082 INFO L82 PathProgramCache]: Analyzing trace with hash -123793500, now seen corresponding path program 56 times [2018-10-03 09:00:17,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:17,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:17,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:17,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:00:17,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:17,089 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:00:17,089 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:00:17,089 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 09:00:17,104 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:00:20,946 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:00:20,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:00:20,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:22,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:00:22,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-10-03 09:00:22,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-03 09:00:22,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-03 09:00:22,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 09:00:22,960 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-10-03 09:00:25,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:25,499 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-03 09:00:25,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-03 09:00:25,499 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-10-03 09:00:25,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:25,500 INFO L225 Difference]: With dead ends: 64 [2018-10-03 09:00:25,500 INFO L226 Difference]: Without dead ends: 62 [2018-10-03 09:00:25,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 09:00:25,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-03 09:00:25,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-03 09:00:25,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-03 09:00:25,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-03 09:00:25,506 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-03 09:00:25,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:25,506 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-03 09:00:25,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-03 09:00:25,506 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-03 09:00:25,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-03 09:00:25,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:25,507 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1] [2018-10-03 09:00:25,507 INFO L423 AbstractCegarLoop]: === Iteration 58 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:00:25,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:25,507 INFO L82 PathProgramCache]: Analyzing trace with hash 457366821, now seen corresponding path program 57 times [2018-10-03 09:00:25,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:25,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:25,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:25,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:00:25,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:25,514 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:00:25,514 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:00:25,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 09:00:25,531 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:00:30,594 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-03 09:00:30,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:00:30,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:32,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:00:32,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-03 09:00:32,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-03 09:00:32,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-03 09:00:32,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 09:00:32,887 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-10-03 09:00:35,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:35,516 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-03 09:00:35,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-03 09:00:35,517 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-10-03 09:00:35,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:35,517 INFO L225 Difference]: With dead ends: 65 [2018-10-03 09:00:35,518 INFO L226 Difference]: Without dead ends: 63 [2018-10-03 09:00:35,518 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 [2018-10-03 09:00:35,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-03 09:00:35,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-03 09:00:35,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-03 09:00:35,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-03 09:00:35,524 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-03 09:00:35,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:35,524 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-03 09:00:35,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-03 09:00:35,524 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-03 09:00:35,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-03 09:00:35,525 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:35,525 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1] [2018-10-03 09:00:35,525 INFO L423 AbstractCegarLoop]: === Iteration 59 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:00:35,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:35,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1293467588, now seen corresponding path program 58 times [2018-10-03 09:00:35,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:35,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:35,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:35,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:00:35,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:35,533 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:00:35,533 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:00:35,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 09:00:35,543 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:00:40,199 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:00:40,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:00:40,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:42,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:00:42,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-10-03 09:00:42,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-03 09:00:42,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-03 09:00:42,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 09:00:42,280 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-10-03 09:00:45,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:45,000 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-03 09:00:45,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-03 09:00:45,000 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-10-03 09:00:45,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:45,001 INFO L225 Difference]: With dead ends: 66 [2018-10-03 09:00:45,001 INFO L226 Difference]: Without dead ends: 64 [2018-10-03 09:00:45,002 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 [2018-10-03 09:00:45,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-03 09:00:45,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-03 09:00:45,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-03 09:00:45,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-03 09:00:45,006 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-03 09:00:45,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:45,006 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-03 09:00:45,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-03 09:00:45,006 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-03 09:00:45,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-03 09:00:45,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:45,007 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1] [2018-10-03 09:00:45,007 INFO L423 AbstractCegarLoop]: === Iteration 60 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:00:45,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:45,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1442787589, now seen corresponding path program 59 times [2018-10-03 09:00:45,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:45,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:45,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:45,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:00:45,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:45,015 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:00:45,015 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:00:45,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 09:00:45,031 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:00:51,051 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-03 09:00:51,051 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:00:51,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:53,184 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:00:53,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-03 09:00:53,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-03 09:00:53,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-03 09:00:53,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 09:00:53,186 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-10-03 09:00:55,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:55,980 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-03 09:00:55,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-03 09:00:55,981 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-10-03 09:00:55,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:55,982 INFO L225 Difference]: With dead ends: 67 [2018-10-03 09:00:55,982 INFO L226 Difference]: Without dead ends: 65 [2018-10-03 09:00:55,982 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 [2018-10-03 09:00:55,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-03 09:00:55,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-03 09:00:55,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-03 09:00:55,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-03 09:00:55,986 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-03 09:00:55,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:55,986 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-03 09:00:55,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-03 09:00:55,987 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-03 09:00:55,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-03 09:00:55,987 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:55,987 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1] [2018-10-03 09:00:55,987 INFO L423 AbstractCegarLoop]: === Iteration 61 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:00:55,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:55,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1776740324, now seen corresponding path program 60 times [2018-10-03 09:00:55,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:55,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:55,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:55,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:00:55,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:55,995 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:00:55,995 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:00:55,996 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 09:00:56,012 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:01:02,158 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-03 09:01:02,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:01:02,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:01:04,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:01:04,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:01:04,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-10-03 09:01:04,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-03 09:01:04,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-03 09:01:04,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 09:01:04,276 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-10-03 09:01:07,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:01:07,151 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-03 09:01:07,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-03 09:01:07,152 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-10-03 09:01:07,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:01:07,153 INFO L225 Difference]: With dead ends: 68 [2018-10-03 09:01:07,153 INFO L226 Difference]: Without dead ends: 66 [2018-10-03 09:01:07,153 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 [2018-10-03 09:01:07,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-03 09:01:07,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-03 09:01:07,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-03 09:01:07,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-03 09:01:07,158 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-03 09:01:07,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:01:07,158 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-03 09:01:07,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-03 09:01:07,159 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-03 09:01:07,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-03 09:01:07,159 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:01:07,159 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1] [2018-10-03 09:01:07,159 INFO L423 AbstractCegarLoop]: === Iteration 62 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:01:07,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:01:07,159 INFO L82 PathProgramCache]: Analyzing trace with hash -755626779, now seen corresponding path program 61 times [2018-10-03 09:01:07,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:01:07,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:01:07,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:01:07,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:01:07,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:01:07,168 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:01:07,168 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:01:07,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 09:01:07,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:01:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:01:12,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:01:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:01:15,134 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:01:15,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-03 09:01:15,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-03 09:01:15,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-03 09:01:15,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 09:01:15,135 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-10-03 09:01:18,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:01:18,118 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-03 09:01:18,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-03 09:01:18,119 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-10-03 09:01:18,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:01:18,120 INFO L225 Difference]: With dead ends: 69 [2018-10-03 09:01:18,120 INFO L226 Difference]: Without dead ends: 67 [2018-10-03 09:01:18,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=131, Invalid=4159, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 09:01:18,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-03 09:01:18,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-03 09:01:18,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-03 09:01:18,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-03 09:01:18,125 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-03 09:01:18,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:01:18,125 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-03 09:01:18,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-03 09:01:18,125 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-03 09:01:18,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-03 09:01:18,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:01:18,126 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1] [2018-10-03 09:01:18,126 INFO L423 AbstractCegarLoop]: === Iteration 63 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:01:18,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:01:18,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1949595644, now seen corresponding path program 62 times [2018-10-03 09:01:18,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:01:18,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:01:18,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:01:18,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:01:18,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:01:18,133 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:01:18,133 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:01:18,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 09:01:18,148 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:01:24,135 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:01:24,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:01:24,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:01:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:01:26,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:01:26,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-10-03 09:01:26,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-03 09:01:26,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-03 09:01:26,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 09:01:26,414 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-10-03 09:01:29,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:01:29,471 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-03 09:01:29,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-03 09:01:29,471 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-10-03 09:01:29,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:01:29,472 INFO L225 Difference]: With dead ends: 70 [2018-10-03 09:01:29,472 INFO L226 Difference]: Without dead ends: 68 [2018-10-03 09:01:29,473 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 [2018-10-03 09:01:29,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-03 09:01:29,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-03 09:01:29,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-03 09:01:29,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-03 09:01:29,478 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-03 09:01:29,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:01:29,478 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-03 09:01:29,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-03 09:01:29,478 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-03 09:01:29,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-03 09:01:29,479 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:01:29,479 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1] [2018-10-03 09:01:29,479 INFO L423 AbstractCegarLoop]: === Iteration 64 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:01:29,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:01:29,479 INFO L82 PathProgramCache]: Analyzing trace with hash -307924795, now seen corresponding path program 63 times [2018-10-03 09:01:29,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:01:29,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:01:29,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:01:29,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:01:29,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:01:29,487 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:01:29,487 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:01:29,487 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 [2018-10-03 09:01:29,497 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:01:37,382 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-03 09:01:37,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:01:37,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:01:39,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:01:39,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:01:39,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-03 09:01:39,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-03 09:01:39,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-03 09:01:39,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 09:01:39,845 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-10-03 09:01:42,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:01:42,996 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-03 09:01:42,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-03 09:01:42,997 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-10-03 09:01:42,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:01:42,998 INFO L225 Difference]: With dead ends: 71 [2018-10-03 09:01:42,998 INFO L226 Difference]: Without dead ends: 69 [2018-10-03 09:01:42,999 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 [2018-10-03 09:01:42,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-03 09:01:43,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-03 09:01:43,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-03 09:01:43,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-03 09:01:43,004 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-03 09:01:43,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:01:43,005 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-03 09:01:43,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-03 09:01:43,005 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-03 09:01:43,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-03 09:01:43,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:01:43,005 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1] [2018-10-03 09:01:43,006 INFO L423 AbstractCegarLoop]: === Iteration 65 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:01:43,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:01:43,006 INFO L82 PathProgramCache]: Analyzing trace with hash -955736028, now seen corresponding path program 64 times [2018-10-03 09:01:43,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:01:43,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:01:43,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:01:43,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:01:43,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:01:43,014 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:01:43,014 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:01:43,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 09:01:43,023 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:01:49,947 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:01:49,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:01:49,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:01:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:01:53,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:01:53,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-10-03 09:01:53,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-03 09:01:53,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-03 09:01:53,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 09:01:53,406 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-10-03 09:01:56,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:01:56,658 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-03 09:01:56,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-03 09:01:56,659 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-10-03 09:01:56,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:01:56,660 INFO L225 Difference]: With dead ends: 72 [2018-10-03 09:01:56,660 INFO L226 Difference]: Without dead ends: 70 [2018-10-03 09:01:56,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 09:01:56,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-03 09:01:56,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-03 09:01:56,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-03 09:01:56,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-03 09:01:56,664 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-10-03 09:01:56,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:01:56,665 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-03 09:01:56,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-03 09:01:56,665 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-03 09:01:56,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-03 09:01:56,665 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:01:56,665 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1] [2018-10-03 09:01:56,666 INFO L423 AbstractCegarLoop]: === Iteration 66 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:01:56,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:01:56,666 INFO L82 PathProgramCache]: Analyzing trace with hash 436952229, now seen corresponding path program 65 times [2018-10-03 09:01:56,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:01:56,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:01:56,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:01:56,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:01:56,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:01:56,673 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:01:56,674 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:01:56,674 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 09:01:56,689 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown