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_PUPT.epf -i ../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2eb0a67 [2018-10-03 09:21:08,252 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 09:21:08,254 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 09:21:08,271 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 09:21:08,271 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 09:21:08,273 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 09:21:08,274 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 09:21:08,276 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 09:21:08,278 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 09:21:08,279 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 09:21:08,280 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-03 09:21:08,280 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-03 09:21:08,281 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-03 09:21:08,282 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-03 09:21:08,286 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-03 09:21:08,287 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-03 09:21:08,288 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-03 09:21:08,291 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-03 09:21:08,297 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-03 09:21:08,298 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-03 09:21:08,301 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-03 09:21:08,304 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-03 09:21:08,307 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-03 09:21:08,322 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-03 09:21:08,338 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 09:21:08,338 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 09:21:08,339 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 09:21:08,339 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 09:21:08,340 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 09:21:08,340 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 09:21:08,340 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 09:21:08,341 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 09:21:08,341 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 09:21:08,342 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 09:21:08,342 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 09:21:08,342 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 09:21:08,342 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 09:21:08,342 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 09:21:08,343 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 09:21:08,343 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 09:21:08,343 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 09:21:08,343 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 09:21:08,345 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 09:21:08,345 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 09:21:08,345 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 09:21:08,345 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 09:21:08,345 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 09:21:08,346 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 09:21:08,346 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 09:21:08,346 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 09:21:08,346 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 09:21:08,346 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 09:21:08,347 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 09:21:08,347 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 09:21:08,347 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-03 09:21:08,407 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 09:21:08,420 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 09:21:08,424 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 09:21:08,425 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 09:21:08,426 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 09:21:08,427 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl [2018-10-03 09:21:08,427 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl' [2018-10-03 09:21:08,473 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 09:21:08,476 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 09:21:08,477 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 09:21:08,477 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 09:21:08,477 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 09:21:08,499 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 09:21:08" (1/1) ... [2018-10-03 09:21:08,511 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 09:21:08" (1/1) ... [2018-10-03 09:21:08,517 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-03 09:21:08,517 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-03 09:21:08,517 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-03 09:21:08,519 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 09:21:08,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 09:21:08,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 09:21:08,521 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 09:21:08,532 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 09:21:08" (1/1) ... [2018-10-03 09:21:08,532 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 09:21:08" (1/1) ... [2018-10-03 09:21:08,533 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 09:21:08" (1/1) ... [2018-10-03 09:21:08,533 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 09:21:08" (1/1) ... [2018-10-03 09:21:08,535 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 09:21:08" (1/1) ... [2018-10-03 09:21:08,541 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 09:21:08" (1/1) ... [2018-10-03 09:21:08,542 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 09:21:08" (1/1) ... [2018-10-03 09:21:08,543 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 09:21:08,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 09:21:08,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 09:21:08,544 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 09:21:08,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:21:08" (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 09:21:08,615 INFO L124 BoogieDeclarations]: Specification and implementation of procedure mult given in one single declaration [2018-10-03 09:21:08,616 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2018-10-03 09:21:08,616 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2018-10-03 09:21:08,692 WARN L617 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-10-03 09:21:08,824 INFO L337 CfgBuilder]: Using library mode [2018-10-03 09:21:08,825 INFO L202 PluginConnector]: Adding new model Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 09:21:08 BoogieIcfgContainer [2018-10-03 09:21:08,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 09:21:08,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 09:21:08,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 09:21:08,830 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 09:21:08,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:21:08" (1/2) ... [2018-10-03 09:21:08,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3df70128 and model type Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 09:21:08, skipping insertion in model container [2018-10-03 09:21:08,832 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 09:21:08" (2/2) ... [2018-10-03 09:21:08,834 INFO L112 eAbstractionObserver]: Analyzing ICFG Mult1-Safe.bpl [2018-10-03 09:21:08,844 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 09:21:08,853 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 09:21:08,906 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 09:21:08,907 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 09:21:08,907 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 09:21:08,907 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 09:21:08,907 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 09:21:08,907 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 09:21:08,908 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 09:21:08,908 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 09:21:08,908 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 09:21:08,926 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-03 09:21:08,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-03 09:21:08,935 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:08,937 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-03 09:21:08,940 INFO L423 AbstractCegarLoop]: === Iteration 1 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:08,947 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:08,947 INFO L82 PathProgramCache]: Analyzing trace with hash 924708, now seen corresponding path program 1 times [2018-10-03 09:21:08,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:08,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:09,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:09,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:21:09,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:09,030 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:09,030 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:09,030 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 09:21:09,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:21:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:21:09,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:09,200 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 09:21:09,223 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 09:21:09,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-03 09:21:09,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 09:21:09,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 09:21:09,242 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:09,244 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 5 states. [2018-10-03 09:21:09,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:09,450 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-03 09:21:09,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 09:21:09,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-10-03 09:21:09,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:09,469 INFO L225 Difference]: With dead ends: 10 [2018-10-03 09:21:09,470 INFO L226 Difference]: Without dead ends: 6 [2018-10-03 09:21:09,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.1s impTime 3 [2018-10-03 09:21:09,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-03 09:21:09,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-03 09:21:09,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-03 09:21:09,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-03 09:21:09,510 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-03 09:21:09,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:09,510 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-03 09:21:09,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 09:21:09,511 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-03 09:21:09,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-03 09:21:09,511 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:09,511 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-03 09:21:09,512 INFO L423 AbstractCegarLoop]: === Iteration 2 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:09,512 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:09,512 INFO L82 PathProgramCache]: Analyzing trace with hash 28663973, now seen corresponding path program 1 times [2018-10-03 09:21:09,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:09,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:09,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:09,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:21:09,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:09,524 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:09,524 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:09,524 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 09:21:09,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:21:09,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:21:09,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:09,630 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 09:21:09,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:09,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-10-03 09:21:09,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 09:21:09,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 09:21:09,654 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:09,655 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-10-03 09:21:09,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:09,769 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-03 09:21:09,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 09:21:09,769 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-10-03 09:21:09,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:09,770 INFO L225 Difference]: With dead ends: 9 [2018-10-03 09:21:09,770 INFO L226 Difference]: Without dead ends: 7 [2018-10-03 09:21:09,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 4 [2018-10-03 09:21:09,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-03 09:21:09,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-03 09:21:09,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-03 09:21:09,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-03 09:21:09,775 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-03 09:21:09,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:09,775 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-03 09:21:09,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 09:21:09,776 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-03 09:21:09,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-03 09:21:09,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:09,776 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-03 09:21:09,777 INFO L423 AbstractCegarLoop]: === Iteration 3 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:09,777 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:09,777 INFO L82 PathProgramCache]: Analyzing trace with hash 888581188, now seen corresponding path program 2 times [2018-10-03 09:21:09,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:09,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:09,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:09,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:21:09,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:09,784 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:09,784 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:09,785 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 09:21:09,799 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:21:09,810 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:21:09,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:09,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:10,087 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 09:21:10,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:10,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-10-03 09:21:10,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 09:21:10,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 09:21:10,108 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:10,108 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-10-03 09:21:10,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:10,235 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-03 09:21:10,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 09:21:10,239 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-10-03 09:21:10,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:10,239 INFO L225 Difference]: With dead ends: 10 [2018-10-03 09:21:10,240 INFO L226 Difference]: Without dead ends: 8 [2018-10-03 09:21:10,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.2s impTime 5 [2018-10-03 09:21:10,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-03 09:21:10,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-03 09:21:10,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-03 09:21:10,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-03 09:21:10,243 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-03 09:21:10,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:10,244 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-03 09:21:10,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 09:21:10,244 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-03 09:21:10,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-03 09:21:10,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:10,245 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2018-10-03 09:21:10,245 INFO L423 AbstractCegarLoop]: === Iteration 4 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:10,245 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:10,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1776211077, now seen corresponding path program 3 times [2018-10-03 09:21:10,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:10,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:10,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:10,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:10,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:10,258 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:10,258 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:10,258 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 09:21:10,266 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:21:10,276 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-03 09:21:10,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:10,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:10,376 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 09:21:10,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:10,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-10-03 09:21:10,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 09:21:10,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 09:21:10,401 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:10,401 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-10-03 09:21:10,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:10,674 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-03 09:21:10,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 09:21:10,674 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-03 09:21:10,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:10,675 INFO L225 Difference]: With dead ends: 11 [2018-10-03 09:21:10,675 INFO L226 Difference]: Without dead ends: 9 [2018-10-03 09:21:10,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 6 [2018-10-03 09:21:10,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-03 09:21:10,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-03 09:21:10,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-03 09:21:10,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-03 09:21:10,679 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-03 09:21:10,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:10,680 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-03 09:21:10,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 09:21:10,680 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-03 09:21:10,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 09:21:10,681 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:10,681 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2018-10-03 09:21:10,681 INFO L423 AbstractCegarLoop]: === Iteration 5 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:10,682 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:10,682 INFO L82 PathProgramCache]: Analyzing trace with hash -772033436, now seen corresponding path program 4 times [2018-10-03 09:21:10,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:10,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:10,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:10,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:10,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:10,694 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:10,694 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:10,694 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 09:21:10,702 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:21:10,712 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:21:10,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:10,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:10,821 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 09:21:10,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:10,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-10-03 09:21:10,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 09:21:10,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 09:21:10,843 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:10,843 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-10-03 09:21:10,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:10,993 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-03 09:21:10,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 09:21:10,993 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-10-03 09:21:10,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:10,994 INFO L225 Difference]: With dead ends: 12 [2018-10-03 09:21:10,994 INFO L226 Difference]: Without dead ends: 10 [2018-10-03 09:21:10,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.1s impTime 7 [2018-10-03 09:21:10,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-03 09:21:10,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-03 09:21:10,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-03 09:21:10,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-03 09:21:10,999 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-03 09:21:10,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:10,999 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-03 09:21:11,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 09:21:11,000 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-03 09:21:11,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 09:21:11,000 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:11,000 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1] [2018-10-03 09:21:11,001 INFO L423 AbstractCegarLoop]: === Iteration 6 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:11,001 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:11,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1836765285, now seen corresponding path program 5 times [2018-10-03 09:21:11,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:11,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:11,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:11,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:11,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:11,011 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:11,011 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:11,011 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 09:21:11,021 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:21:11,035 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-03 09:21:11,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:11,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:11,610 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 09:21:11,637 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:11,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-10-03 09:21:11,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 09:21:11,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 09:21:11,639 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:11,639 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-10-03 09:21:11,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:11,743 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-03 09:21:11,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 09:21:11,744 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-10-03 09:21:11,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:11,745 INFO L225 Difference]: With dead ends: 13 [2018-10-03 09:21:11,746 INFO L226 Difference]: Without dead ends: 11 [2018-10-03 09:21:11,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.4s impTime 8 [2018-10-03 09:21:11,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-03 09:21:11,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-03 09:21:11,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-03 09:21:11,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-03 09:21:11,750 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-03 09:21:11,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:11,750 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-03 09:21:11,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 09:21:11,751 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-03 09:21:11,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-03 09:21:11,751 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:11,751 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2018-10-03 09:21:11,752 INFO L423 AbstractCegarLoop]: === Iteration 7 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:11,752 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:11,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1105147012, now seen corresponding path program 6 times [2018-10-03 09:21:11,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:11,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:11,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:11,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:11,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:11,762 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:11,763 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:11,763 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 09:21:11,781 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:21:11,795 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-03 09:21:11,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:11,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:11,935 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 09:21:11,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:11,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-10-03 09:21:11,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 09:21:11,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 09:21:11,957 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:11,957 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-10-03 09:21:12,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:12,080 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-03 09:21:12,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 09:21:12,080 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-03 09:21:12,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:12,081 INFO L225 Difference]: With dead ends: 14 [2018-10-03 09:21:12,082 INFO L226 Difference]: Without dead ends: 12 [2018-10-03 09:21:12,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 9 [2018-10-03 09:21:12,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-03 09:21:12,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-03 09:21:12,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-03 09:21:12,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-03 09:21:12,087 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-03 09:21:12,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:12,087 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-03 09:21:12,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 09:21:12,087 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-03 09:21:12,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 09:21:12,088 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:12,088 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1] [2018-10-03 09:21:12,088 INFO L423 AbstractCegarLoop]: === Iteration 8 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:12,089 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:12,089 INFO L82 PathProgramCache]: Analyzing trace with hash -100182971, now seen corresponding path program 7 times [2018-10-03 09:21:12,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:12,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:12,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:12,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:12,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:12,100 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:12,100 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:12,100 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 09:21:12,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:21:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:21:12,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:12,278 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 09:21:12,299 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:12,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-10-03 09:21:12,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 09:21:12,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 09:21:12,301 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:12,301 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-10-03 09:21:12,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:12,443 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-03 09:21:12,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 09:21:12,444 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-10-03 09:21:12,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:12,445 INFO L225 Difference]: With dead ends: 15 [2018-10-03 09:21:12,445 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 09:21:12,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 10 [2018-10-03 09:21:12,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 09:21:12,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-03 09:21:12,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-03 09:21:12,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-03 09:21:12,450 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-03 09:21:12,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:12,451 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-03 09:21:12,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 09:21:12,451 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-03 09:21:12,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-03 09:21:12,451 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:12,452 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2018-10-03 09:21:12,452 INFO L423 AbstractCegarLoop]: === Iteration 9 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:12,452 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:12,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1189293220, now seen corresponding path program 8 times [2018-10-03 09:21:12,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:12,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:12,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:12,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:21:12,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:12,464 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:12,464 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:12,465 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) [2018-10-03 09:21:12,480 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 09:21:12,504 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:21:12,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:12,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:12,723 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 09:21:12,745 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:12,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-03 09:21:12,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 09:21:12,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 09:21:12,746 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:12,746 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-10-03 09:21:12,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:12,874 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-03 09:21:12,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 09:21:12,874 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-10-03 09:21:12,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:12,876 INFO L225 Difference]: With dead ends: 16 [2018-10-03 09:21:12,876 INFO L226 Difference]: Without dead ends: 14 [2018-10-03 09:21:12,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 11 [2018-10-03 09:21:12,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-03 09:21:12,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-03 09:21:12,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-03 09:21:12,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-03 09:21:12,881 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-03 09:21:12,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:12,881 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-03 09:21:12,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 09:21:12,882 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-03 09:21:12,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 09:21:12,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:12,882 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1] [2018-10-03 09:21:12,883 INFO L423 AbstractCegarLoop]: === Iteration 10 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:12,883 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:12,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1786617819, now seen corresponding path program 9 times [2018-10-03 09:21:12,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:12,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:12,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:12,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:12,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:12,894 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:12,895 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:12,895 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 09:21:12,910 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:21:12,934 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-03 09:21:12,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:12,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:13,237 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 09:21:13,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:13,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-10-03 09:21:13,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 09:21:13,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 09:21:13,267 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:13,267 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-10-03 09:21:13,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:13,481 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-03 09:21:13,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 09:21:13,482 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-10-03 09:21:13,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:13,483 INFO L225 Difference]: With dead ends: 17 [2018-10-03 09:21:13,483 INFO L226 Difference]: Without dead ends: 15 [2018-10-03 09:21:13,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 12 [2018-10-03 09:21:13,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-03 09:21:13,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-03 09:21:13,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-03 09:21:13,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-03 09:21:13,489 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-03 09:21:13,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:13,489 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-03 09:21:13,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 09:21:13,490 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-03 09:21:13,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-03 09:21:13,490 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:13,490 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2018-10-03 09:21:13,491 INFO L423 AbstractCegarLoop]: === Iteration 11 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:13,491 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:13,491 INFO L82 PathProgramCache]: Analyzing trace with hash 449420484, now seen corresponding path program 10 times [2018-10-03 09:21:13,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:13,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:13,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:13,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:13,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:13,502 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:13,502 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:13,502 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 09:21:13,519 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:21:13,556 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:21:13,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:13,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:13,845 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 09:21:13,866 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:13,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-10-03 09:21:13,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 09:21:13,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 09:21:13,867 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:13,868 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-10-03 09:21:14,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:14,214 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-03 09:21:14,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 09:21:14,214 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-03 09:21:14,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:14,215 INFO L225 Difference]: With dead ends: 18 [2018-10-03 09:21:14,216 INFO L226 Difference]: Without dead ends: 16 [2018-10-03 09:21:14,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 13 [2018-10-03 09:21:14,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-03 09:21:14,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-03 09:21:14,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-03 09:21:14,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-03 09:21:14,222 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-03 09:21:14,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:14,222 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-03 09:21:14,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 09:21:14,223 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-03 09:21:14,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 09:21:14,223 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:14,223 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1] [2018-10-03 09:21:14,224 INFO L423 AbstractCegarLoop]: === Iteration 12 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:14,224 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:14,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1047131141, now seen corresponding path program 11 times [2018-10-03 09:21:14,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:14,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:14,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:14,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:14,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:14,237 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:14,237 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:14,237 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 09:21:14,245 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:21:14,283 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 09:21:14,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:14,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:14,516 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 09:21:14,537 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:14,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-10-03 09:21:14,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 09:21:14,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 09:21:14,538 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:14,538 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-10-03 09:21:14,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:14,841 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-03 09:21:14,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 09:21:14,841 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-10-03 09:21:14,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:14,842 INFO L225 Difference]: With dead ends: 19 [2018-10-03 09:21:14,843 INFO L226 Difference]: Without dead ends: 17 [2018-10-03 09:21:14,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 14 [2018-10-03 09:21:14,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-03 09:21:14,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-03 09:21:14,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-03 09:21:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-03 09:21:14,849 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-03 09:21:14,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:14,849 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-03 09:21:14,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 09:21:14,849 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-03 09:21:14,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-03 09:21:14,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:14,850 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1] [2018-10-03 09:21:14,850 INFO L423 AbstractCegarLoop]: === Iteration 13 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:14,851 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:14,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1898674972, now seen corresponding path program 12 times [2018-10-03 09:21:14,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:14,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:14,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:14,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:14,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:14,864 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:14,865 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:14,865 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 09:21:14,875 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:21:14,912 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 09:21:14,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:14,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:15,150 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 09:21:15,172 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:15,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-03 09:21:15,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 09:21:15,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 09:21:15,173 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:15,188 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-10-03 09:21:15,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:15,400 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-03 09:21:15,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 09:21:15,400 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-10-03 09:21:15,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:15,401 INFO L225 Difference]: With dead ends: 20 [2018-10-03 09:21:15,401 INFO L226 Difference]: Without dead ends: 18 [2018-10-03 09:21:15,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 15 [2018-10-03 09:21:15,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-03 09:21:15,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-03 09:21:15,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-03 09:21:15,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-03 09:21:15,406 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-03 09:21:15,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:15,406 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-03 09:21:15,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 09:21:15,406 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-03 09:21:15,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 09:21:15,407 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:15,407 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1] [2018-10-03 09:21:15,407 INFO L423 AbstractCegarLoop]: === Iteration 14 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:15,407 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:15,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1270616037, now seen corresponding path program 13 times [2018-10-03 09:21:15,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:15,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:15,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:15,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:15,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:15,418 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:15,418 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:15,418 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 09:21:15,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:21:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:21:15,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:15,749 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 09:21:15,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:15,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-10-03 09:21:15,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 09:21:15,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 09:21:15,773 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:15,773 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-10-03 09:21:16,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:16,497 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-03 09:21:16,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 09:21:16,497 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-10-03 09:21:16,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:16,498 INFO L225 Difference]: With dead ends: 21 [2018-10-03 09:21:16,498 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 09:21:16,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 16 [2018-10-03 09:21:16,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 09:21:16,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-03 09:21:16,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 09:21:16,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-03 09:21:16,507 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-03 09:21:16,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:16,507 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-03 09:21:16,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 09:21:16,509 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-03 09:21:16,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-03 09:21:16,510 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:16,510 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1] [2018-10-03 09:21:16,510 INFO L423 AbstractCegarLoop]: === Iteration 15 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:16,511 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:16,511 INFO L82 PathProgramCache]: Analyzing trace with hash 734389508, now seen corresponding path program 14 times [2018-10-03 09:21:16,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:16,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:16,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:16,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:21:16,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:16,537 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:16,537 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:16,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:21:16,560 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:21:16,640 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:21:16,640 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:16,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:17,283 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 09:21:17,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:17,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-03 09:21:17,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 09:21:17,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 09:21:17,307 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:17,307 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-10-03 09:21:17,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:17,628 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-03 09:21:17,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 09:21:17,629 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-03 09:21:17,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:17,630 INFO L225 Difference]: With dead ends: 22 [2018-10-03 09:21:17,630 INFO L226 Difference]: Without dead ends: 20 [2018-10-03 09:21:17,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 17 [2018-10-03 09:21:17,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-03 09:21:17,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-03 09:21:17,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 09:21:17,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-03 09:21:17,636 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-03 09:21:17,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:17,637 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-03 09:21:17,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 09:21:17,637 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-03 09:21:17,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 09:21:17,639 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:17,639 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1] [2018-10-03 09:21:17,639 INFO L423 AbstractCegarLoop]: === Iteration 16 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:17,639 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:17,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1291236293, now seen corresponding path program 15 times [2018-10-03 09:21:17,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:17,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:17,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:17,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:17,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:17,649 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:17,650 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:17,650 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 09:21:17,675 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:21:17,777 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 09:21:17,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:17,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:19,181 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 09:21:19,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:19,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-10-03 09:21:19,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 09:21:19,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 09:21:19,202 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:19,202 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-10-03 09:21:19,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:19,640 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-03 09:21:19,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 09:21:19,640 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-10-03 09:21:19,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:19,641 INFO L225 Difference]: With dead ends: 23 [2018-10-03 09:21:19,641 INFO L226 Difference]: Without dead ends: 21 [2018-10-03 09:21:19,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime 18 [2018-10-03 09:21:19,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-03 09:21:19,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-03 09:21:19,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-03 09:21:19,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-03 09:21:19,650 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-03 09:21:19,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:19,651 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-03 09:21:19,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 09:21:19,651 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-03 09:21:19,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-03 09:21:19,652 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:19,652 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1] [2018-10-03 09:21:19,652 INFO L423 AbstractCegarLoop]: === Iteration 17 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:19,652 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:19,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1373617444, now seen corresponding path program 16 times [2018-10-03 09:21:19,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:19,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:19,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:19,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:19,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:19,667 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:19,667 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:19,668 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:21:19,680 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:21:19,764 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:21:19,764 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:19,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:20,301 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 09:21:20,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:20,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-03 09:21:20,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 09:21:20,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 09:21:20,322 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:20,322 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-10-03 09:21:20,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:20,762 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-03 09:21:20,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 09:21:20,763 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-10-03 09:21:20,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:20,764 INFO L225 Difference]: With dead ends: 24 [2018-10-03 09:21:20,764 INFO L226 Difference]: Without dead ends: 22 [2018-10-03 09:21:20,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.4s impTime 19 [2018-10-03 09:21:20,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-03 09:21:20,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-03 09:21:20,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 09:21:20,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-03 09:21:20,770 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-03 09:21:20,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:20,770 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-03 09:21:20,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 09:21:20,770 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-03 09:21:20,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-03 09:21:20,771 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:20,771 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1] [2018-10-03 09:21:20,771 INFO L423 AbstractCegarLoop]: === Iteration 18 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:20,772 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:20,772 INFO L82 PathProgramCache]: Analyzing trace with hash -367534171, now seen corresponding path program 17 times [2018-10-03 09:21:20,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:20,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:20,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:20,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:20,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:20,782 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:20,782 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:20,782 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) [2018-10-03 09:21:20,809 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 09:21:20,921 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-03 09:21:20,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:20,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:21,256 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 09:21:21,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:21,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-03 09:21:21,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 09:21:21,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 09:21:21,278 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:21,282 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-10-03 09:21:21,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:21,690 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-03 09:21:21,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 09:21:21,691 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-10-03 09:21:21,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:21,692 INFO L225 Difference]: With dead ends: 25 [2018-10-03 09:21:21,692 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 09:21:21,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 20 [2018-10-03 09:21:21,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 09:21:21,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-03 09:21:21,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-03 09:21:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-03 09:21:21,697 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-03 09:21:21,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:21,697 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-03 09:21:21,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 09:21:21,698 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-03 09:21:21,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-03 09:21:21,698 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:21,698 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1] [2018-10-03 09:21:21,699 INFO L423 AbstractCegarLoop]: === Iteration 19 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:21,699 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:21,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1491340612, now seen corresponding path program 18 times [2018-10-03 09:21:21,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:21,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:21,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:21,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:21,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:21,709 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:21,709 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:21,710 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 09:21:21,726 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:21:21,848 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-03 09:21:21,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:21,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:22,239 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 09:21:22,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:22,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-10-03 09:21:22,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 09:21:22,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 09:21:22,261 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:22,261 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-10-03 09:21:22,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:22,659 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-03 09:21:22,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 09:21:22,659 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-03 09:21:22,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:22,660 INFO L225 Difference]: With dead ends: 26 [2018-10-03 09:21:22,660 INFO L226 Difference]: Without dead ends: 24 [2018-10-03 09:21:22,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.3s impTime 21 [2018-10-03 09:21:22,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-03 09:21:22,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-03 09:21:22,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 09:21:22,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-03 09:21:22,666 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-03 09:21:22,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:22,667 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-03 09:21:22,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 09:21:22,667 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-03 09:21:22,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-03 09:21:22,668 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:22,668 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1] [2018-10-03 09:21:22,668 INFO L423 AbstractCegarLoop]: === Iteration 20 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:22,668 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:22,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1013083259, now seen corresponding path program 19 times [2018-10-03 09:21:22,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:22,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:22,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:22,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:22,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:22,678 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:22,678 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:22,678 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 09:21:22,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:21:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:21:22,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:23,328 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 09:21:23,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:23,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-03 09:21:23,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 09:21:23,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 09:21:23,350 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:23,350 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-10-03 09:21:24,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:24,096 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-03 09:21:24,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 09:21:24,096 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-10-03 09:21:24,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:24,097 INFO L225 Difference]: With dead ends: 27 [2018-10-03 09:21:24,097 INFO L226 Difference]: Without dead ends: 25 [2018-10-03 09:21:24,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.4s impTime 22 [2018-10-03 09:21:24,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-03 09:21:24,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-03 09:21:24,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-03 09:21:24,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-03 09:21:24,102 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-03 09:21:24,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:24,102 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-03 09:21:24,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 09:21:24,102 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-03 09:21:24,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-03 09:21:24,103 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:24,103 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1] [2018-10-03 09:21:24,103 INFO L423 AbstractCegarLoop]: === Iteration 21 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:24,103 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:24,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1340811932, now seen corresponding path program 20 times [2018-10-03 09:21:24,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:24,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:24,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:24,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:21:24,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:24,111 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:24,112 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:24,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:21:24,138 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:21:24,300 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:21:24,300 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:24,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:24,755 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 09:21:24,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:24,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-10-03 09:21:24,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 09:21:24,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 09:21:24,777 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:24,777 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-10-03 09:21:25,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:25,285 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-03 09:21:25,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 09:21:25,286 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-10-03 09:21:25,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:25,287 INFO L225 Difference]: With dead ends: 28 [2018-10-03 09:21:25,287 INFO L226 Difference]: Without dead ends: 26 [2018-10-03 09:21:25,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 23 [2018-10-03 09:21:25,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-03 09:21:25,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-03 09:21:25,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 09:21:25,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-03 09:21:25,292 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-03 09:21:25,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:25,293 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-03 09:21:25,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 09:21:25,293 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-03 09:21:25,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-03 09:21:25,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:25,294 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1] [2018-10-03 09:21:25,294 INFO L423 AbstractCegarLoop]: === Iteration 22 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:25,294 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:25,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1384501093, now seen corresponding path program 21 times [2018-10-03 09:21:25,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:25,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:25,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:25,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:25,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:25,302 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:25,302 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:25,302 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 09:21:25,312 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:21:25,486 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-03 09:21:25,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:25,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:26,029 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 09:21:26,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:26,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-03 09:21:26,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 09:21:26,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 09:21:26,051 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:26,052 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-10-03 09:21:26,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:26,840 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-03 09:21:26,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 09:21:26,842 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-10-03 09:21:26,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:26,843 INFO L225 Difference]: With dead ends: 29 [2018-10-03 09:21:26,843 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 09:21:26,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 24 [2018-10-03 09:21:26,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 09:21:26,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-03 09:21:26,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-03 09:21:26,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-03 09:21:26,847 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-03 09:21:26,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:26,847 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-03 09:21:26,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 09:21:26,848 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-03 09:21:26,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-03 09:21:26,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:26,848 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2018-10-03 09:21:26,849 INFO L423 AbstractCegarLoop]: === Iteration 23 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:26,849 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:26,849 INFO L82 PathProgramCache]: Analyzing trace with hash -30141052, now seen corresponding path program 22 times [2018-10-03 09:21:26,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:26,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:26,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:26,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:26,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:26,856 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:26,857 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:26,857 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 09:21:26,869 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:21:27,058 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:21:27,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:27,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:27,545 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 09:21:27,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:27,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-03 09:21:27,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 09:21:27,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 09:21:27,579 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:27,579 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-10-03 09:21:28,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:28,207 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-03 09:21:28,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 09:21:28,207 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-03 09:21:28,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:28,208 INFO L225 Difference]: With dead ends: 30 [2018-10-03 09:21:28,208 INFO L226 Difference]: Without dead ends: 28 [2018-10-03 09:21:28,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.4s impTime 25 [2018-10-03 09:21:28,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-03 09:21:28,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-03 09:21:28,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 09:21:28,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-03 09:21:28,216 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-03 09:21:28,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:28,216 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-03 09:21:28,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 09:21:28,216 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-03 09:21:28,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-03 09:21:28,217 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:28,217 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1] [2018-10-03 09:21:28,217 INFO L423 AbstractCegarLoop]: === Iteration 24 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:28,217 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:28,217 INFO L82 PathProgramCache]: Analyzing trace with hash -934374587, now seen corresponding path program 23 times [2018-10-03 09:21:28,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:28,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:28,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:28,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:28,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:28,224 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:28,224 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:28,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:21:28,234 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:21:28,488 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-03 09:21:28,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:28,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:29,087 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 09:21:29,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:29,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-10-03 09:21:29,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 09:21:29,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 09:21:29,109 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:29,109 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-10-03 09:21:29,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:29,626 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-03 09:21:29,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 09:21:29,626 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-10-03 09:21:29,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:29,627 INFO L225 Difference]: With dead ends: 31 [2018-10-03 09:21:29,628 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 09:21:29,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.5s impTime 26 [2018-10-03 09:21:29,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 09:21:29,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-03 09:21:29,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-03 09:21:29,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-03 09:21:29,634 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-03 09:21:29,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:29,634 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-03 09:21:29,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 09:21:29,634 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-03 09:21:29,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-03 09:21:29,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:29,635 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1] [2018-10-03 09:21:29,635 INFO L423 AbstractCegarLoop]: === Iteration 25 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:29,636 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:29,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1099156900, now seen corresponding path program 24 times [2018-10-03 09:21:29,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:29,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:29,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:29,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:29,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:29,645 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:29,645 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:29,645 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 09:21:29,663 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:21:29,937 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-03 09:21:29,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:29,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:30,517 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 09:21:30,537 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:30,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-10-03 09:21:30,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 09:21:30,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 09:21:30,538 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:30,539 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-10-03 09:21:31,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:31,157 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-03 09:21:31,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 09:21:31,158 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-10-03 09:21:31,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:31,158 INFO L225 Difference]: With dead ends: 32 [2018-10-03 09:21:31,158 INFO L226 Difference]: Without dead ends: 30 [2018-10-03 09:21:31,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.5s impTime 27 [2018-10-03 09:21:31,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-03 09:21:31,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-03 09:21:31,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 09:21:31,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-03 09:21:31,163 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-03 09:21:31,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:31,163 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-03 09:21:31,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 09:21:31,164 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-03 09:21:31,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-03 09:21:31,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:31,164 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1] [2018-10-03 09:21:31,164 INFO L423 AbstractCegarLoop]: === Iteration 26 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:31,165 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:31,165 INFO L82 PathProgramCache]: Analyzing trace with hash -285876443, now seen corresponding path program 25 times [2018-10-03 09:21:31,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:31,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:31,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:31,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:31,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:31,172 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:31,172 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:31,172 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 09:21:31,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:21:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:21:31,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:32,192 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 09:21:32,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:32,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-03 09:21:32,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 09:21:32,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 09:21:32,212 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:32,212 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-10-03 09:21:32,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:32,842 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-03 09:21:32,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 09:21:32,843 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-10-03 09:21:32,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:32,843 INFO L225 Difference]: With dead ends: 33 [2018-10-03 09:21:32,844 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 09:21:32,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.5s impTime 28 [2018-10-03 09:21:32,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 09:21:32,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-03 09:21:32,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 09:21:32,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-03 09:21:32,849 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-03 09:21:32,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:32,849 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-03 09:21:32,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 09:21:32,849 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-03 09:21:32,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-03 09:21:32,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:32,850 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1] [2018-10-03 09:21:32,850 INFO L423 AbstractCegarLoop]: === Iteration 27 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:32,850 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:32,850 INFO L82 PathProgramCache]: Analyzing trace with hash -272237116, now seen corresponding path program 26 times [2018-10-03 09:21:32,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:32,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:32,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:32,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:21:32,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:32,858 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:32,858 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:32,858 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 09:21:32,873 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:21:33,252 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:21:33,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:33,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:35,112 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 09:21:35,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:35,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-03 09:21:35,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 09:21:35,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 09:21:35,133 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:35,133 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-10-03 09:21:35,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:35,774 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-03 09:21:35,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 09:21:35,774 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-03 09:21:35,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:35,775 INFO L225 Difference]: With dead ends: 34 [2018-10-03 09:21:35,775 INFO L226 Difference]: Without dead ends: 32 [2018-10-03 09:21:35,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.6s impTime 29 [2018-10-03 09:21:35,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-03 09:21:35,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-03 09:21:35,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 09:21:35,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-03 09:21:35,780 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-03 09:21:35,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:35,781 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-03 09:21:35,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 09:21:35,781 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-03 09:21:35,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-03 09:21:35,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:35,781 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1] [2018-10-03 09:21:35,782 INFO L423 AbstractCegarLoop]: === Iteration 28 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:35,782 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:35,782 INFO L82 PathProgramCache]: Analyzing trace with hash 150582021, now seen corresponding path program 27 times [2018-10-03 09:21:35,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:35,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:35,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:35,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:35,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:35,790 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:35,790 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:35,790 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 09:21:35,805 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:21:36,251 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-03 09:21:36,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:36,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:36,898 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 09:21:36,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:36,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-03 09:21:36,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 09:21:36,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 09:21:36,919 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:36,919 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-10-03 09:21:37,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:37,602 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-03 09:21:37,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 09:21:37,602 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-10-03 09:21:37,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:37,603 INFO L225 Difference]: With dead ends: 35 [2018-10-03 09:21:37,603 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 09:21:37,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.5s impTime 30 [2018-10-03 09:21:37,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 09:21:37,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-03 09:21:37,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-03 09:21:37,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-03 09:21:37,609 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-03 09:21:37,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:37,609 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-03 09:21:37,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 09:21:37,609 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-03 09:21:37,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-03 09:21:37,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:37,610 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1] [2018-10-03 09:21:37,610 INFO L423 AbstractCegarLoop]: === Iteration 29 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:37,610 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:37,610 INFO L82 PathProgramCache]: Analyzing trace with hash 373073380, now seen corresponding path program 28 times [2018-10-03 09:21:37,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:37,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:37,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:37,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:37,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:37,616 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:37,616 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:37,617 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 09:21:37,631 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:21:38,145 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:21:38,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:38,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:39,030 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 09:21:39,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:39,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-10-03 09:21:39,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 09:21:39,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 09:21:39,053 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:39,053 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-10-03 09:21:39,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:39,831 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-03 09:21:39,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 09:21:39,832 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-10-03 09:21:39,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:39,833 INFO L225 Difference]: With dead ends: 36 [2018-10-03 09:21:39,833 INFO L226 Difference]: Without dead ends: 34 [2018-10-03 09:21:39,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.7s impTime 31 [2018-10-03 09:21:39,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-03 09:21:39,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-03 09:21:39,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 09:21:39,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-03 09:21:39,839 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-03 09:21:39,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:39,839 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-03 09:21:39,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 09:21:39,839 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-03 09:21:39,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-03 09:21:39,839 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:39,840 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1] [2018-10-03 09:21:39,840 INFO L423 AbstractCegarLoop]: === Iteration 30 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:39,840 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:39,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1319629083, now seen corresponding path program 29 times [2018-10-03 09:21:39,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:39,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:39,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:39,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:39,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:39,848 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:39,848 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:39,848 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 09:21:39,857 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:21:40,355 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-03 09:21:40,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:40,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:41,175 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 09:21:41,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:41,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-03 09:21:41,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-03 09:21:41,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-03 09:21:41,199 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:41,199 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-10-03 09:21:41,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:41,987 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-03 09:21:41,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 09:21:41,988 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-10-03 09:21:41,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:41,988 INFO L225 Difference]: With dead ends: 37 [2018-10-03 09:21:41,988 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 09:21:41,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 32 [2018-10-03 09:21:41,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 09:21:41,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-03 09:21:41,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-03 09:21:41,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-03 09:21:41,994 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-03 09:21:41,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:41,994 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-03 09:21:41,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-03 09:21:41,994 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-03 09:21:41,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-03 09:21:41,995 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:41,995 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1] [2018-10-03 09:21:41,995 INFO L423 AbstractCegarLoop]: === Iteration 31 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:41,995 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:41,995 INFO L82 PathProgramCache]: Analyzing trace with hash 2041169412, now seen corresponding path program 30 times [2018-10-03 09:21:41,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:41,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:41,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:41,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:41,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:42,003 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:42,003 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:42,003 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 09:21:42,029 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:21:42,573 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-03 09:21:42,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:42,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:43,399 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 09:21:43,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:43,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-03 09:21:43,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 09:21:43,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 09:21:43,420 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:43,420 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-10-03 09:21:44,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:44,540 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-03 09:21:44,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 09:21:44,541 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-03 09:21:44,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:44,541 INFO L225 Difference]: With dead ends: 38 [2018-10-03 09:21:44,541 INFO L226 Difference]: Without dead ends: 36 [2018-10-03 09:21:44,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.7s impTime 33 [2018-10-03 09:21:44,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-03 09:21:44,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-03 09:21:44,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-03 09:21:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-03 09:21:44,549 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-03 09:21:44,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:44,549 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-03 09:21:44,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 09:21:44,549 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-03 09:21:44,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-03 09:21:44,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:44,550 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1] [2018-10-03 09:21:44,550 INFO L423 AbstractCegarLoop]: === Iteration 32 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:44,550 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:44,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1148259643, now seen corresponding path program 31 times [2018-10-03 09:21:44,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:44,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:44,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:44,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:44,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:44,557 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:44,557 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:44,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:21:44,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:21:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:21:45,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:46,078 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 09:21:46,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:46,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-10-03 09:21:46,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 09:21:46,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 09:21:46,098 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:46,098 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-10-03 09:21:46,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:46,983 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-03 09:21:46,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 09:21:46,983 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-10-03 09:21:46,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:46,984 INFO L225 Difference]: With dead ends: 39 [2018-10-03 09:21:46,984 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 09:21:46,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.7s impTime 34 [2018-10-03 09:21:46,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 09:21:46,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-03 09:21:46,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-03 09:21:46,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-03 09:21:46,990 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-03 09:21:46,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:46,990 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-03 09:21:46,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 09:21:46,990 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-03 09:21:46,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-03 09:21:46,991 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:46,991 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1] [2018-10-03 09:21:46,991 INFO L423 AbstractCegarLoop]: === Iteration 33 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:46,991 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:46,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1236312540, now seen corresponding path program 32 times [2018-10-03 09:21:46,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:46,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:46,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:46,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:21:46,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:46,998 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:46,998 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:46,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:21:47,013 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:21:47,687 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:21:47,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:47,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:48,620 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 09:21:48,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:48,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-10-03 09:21:48,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 09:21:48,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 09:21:48,642 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:48,642 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-10-03 09:21:49,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:49,722 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-03 09:21:49,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 09:21:49,723 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-10-03 09:21:49,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:49,724 INFO L225 Difference]: With dead ends: 40 [2018-10-03 09:21:49,724 INFO L226 Difference]: Without dead ends: 38 [2018-10-03 09:21:49,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime 35 [2018-10-03 09:21:49,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-03 09:21:49,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-03 09:21:49,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-03 09:21:49,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-03 09:21:49,729 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-03 09:21:49,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:49,729 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-03 09:21:49,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 09:21:49,729 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-03 09:21:49,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-03 09:21:49,730 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:49,730 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1] [2018-10-03 09:21:49,730 INFO L423 AbstractCegarLoop]: === Iteration 34 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:49,731 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:49,731 INFO L82 PathProgramCache]: Analyzing trace with hash 329014949, now seen corresponding path program 33 times [2018-10-03 09:21:49,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:49,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:49,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:49,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:49,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:49,738 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:49,739 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:49,739 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 09:21:49,765 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:21:50,459 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-03 09:21:50,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:50,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:51,403 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 09:21:51,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:51,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-03 09:21:51,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-03 09:21:51,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-03 09:21:51,423 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:51,423 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-10-03 09:21:52,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:52,457 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-03 09:21:52,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 09:21:52,457 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-10-03 09:21:52,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:52,458 INFO L225 Difference]: With dead ends: 41 [2018-10-03 09:21:52,458 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 09:21:52,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.8s impTime 36 [2018-10-03 09:21:52,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 09:21:52,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-03 09:21:52,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-03 09:21:52,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-03 09:21:52,464 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-03 09:21:52,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:52,464 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-03 09:21:52,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-03 09:21:52,464 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-03 09:21:52,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 09:21:52,464 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:52,465 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1] [2018-10-03 09:21:52,465 INFO L423 AbstractCegarLoop]: === Iteration 35 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:52,465 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:52,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1609526852, now seen corresponding path program 34 times [2018-10-03 09:21:52,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:52,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:52,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:52,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:52,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:52,472 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:52,472 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:52,472 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 09:21:52,488 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:21:53,234 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:21:53,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:53,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:54,297 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 09:21:54,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:54,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-03 09:21:54,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 09:21:54,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 09:21:54,319 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:54,319 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-10-03 09:21:55,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:55,351 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-03 09:21:55,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 09:21:55,352 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-03 09:21:55,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:55,352 INFO L225 Difference]: With dead ends: 42 [2018-10-03 09:21:55,352 INFO L226 Difference]: Without dead ends: 40 [2018-10-03 09:21:55,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.9s impTime 37 [2018-10-03 09:21:55,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-03 09:21:55,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-03 09:21:55,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-03 09:21:55,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-03 09:21:55,357 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-03 09:21:55,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:55,358 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-03 09:21:55,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 09:21:55,358 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-03 09:21:55,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-03 09:21:55,358 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:55,358 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1] [2018-10-03 09:21:55,359 INFO L423 AbstractCegarLoop]: === Iteration 36 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:55,359 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:55,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1644277115, now seen corresponding path program 35 times [2018-10-03 09:21:55,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:55,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:55,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:55,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:55,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:55,366 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:55,366 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:55,366 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 09:21:55,386 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:21:56,328 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-03 09:21:56,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:56,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:57,340 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 09:21:57,359 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:21:57,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-03 09:21:57,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-03 09:21:57,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-03 09:21:57,360 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:57,360 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-10-03 09:21:58,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:58,450 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-03 09:21:58,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 09:21:58,450 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-10-03 09:21:58,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:58,451 INFO L225 Difference]: With dead ends: 43 [2018-10-03 09:21:58,451 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 09:21:58,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.9s impTime 38 [2018-10-03 09:21:58,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 09:21:58,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-03 09:21:58,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-03 09:21:58,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-03 09:21:58,457 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-03 09:21:58,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:58,457 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-03 09:21:58,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-03 09:21:58,457 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-03 09:21:58,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-03 09:21:58,458 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:58,458 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1] [2018-10-03 09:21:58,458 INFO L423 AbstractCegarLoop]: === Iteration 37 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:21:58,458 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:58,459 INFO L82 PathProgramCache]: Analyzing trace with hash 567015012, now seen corresponding path program 36 times [2018-10-03 09:21:58,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:58,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:58,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:58,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:58,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:58,465 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:21:58,465 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:21:58,466 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 09:21:58,481 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:21:59,568 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-03 09:21:59,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:59,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:22:00,713 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 09:22:00,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:22:00,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-10-03 09:22:00,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 09:22:00,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 09:22:00,734 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:22:00,734 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-10-03 09:22:01,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:22:01,866 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-03 09:22:01,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 09:22:01,866 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-10-03 09:22:01,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:22:01,867 INFO L225 Difference]: With dead ends: 44 [2018-10-03 09:22:01,867 INFO L226 Difference]: Without dead ends: 42 [2018-10-03 09:22:01,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 1.0s impTime 39 [2018-10-03 09:22:01,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-03 09:22:01,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-03 09:22:01,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-03 09:22:01,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-03 09:22:01,871 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-03 09:22:01,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:22:01,872 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-03 09:22:01,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 09:22:01,872 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-03 09:22:01,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-03 09:22:01,872 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:22:01,872 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1] [2018-10-03 09:22:01,873 INFO L423 AbstractCegarLoop]: === Iteration 38 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:22:01,873 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:22:01,873 INFO L82 PathProgramCache]: Analyzing trace with hash 397594213, now seen corresponding path program 37 times [2018-10-03 09:22:01,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:22:01,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:22:01,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:01,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:22:01,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:01,880 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:22:01,880 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:22:01,880 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) [2018-10-03 09:22:01,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 09:22:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:22:03,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:22:05,136 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 09:22:05,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:22:05,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-03 09:22:05,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 09:22:05,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 09:22:05,158 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:22:05,158 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-10-03 09:22:06,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:22:06,350 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-03 09:22:06,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 09:22:06,350 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-10-03 09:22:06,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:22:06,351 INFO L225 Difference]: With dead ends: 45 [2018-10-03 09:22:06,351 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 09:22:06,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.6s impTime 40 [2018-10-03 09:22:06,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 09:22:06,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-03 09:22:06,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-03 09:22:06,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-03 09:22:06,356 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-03 09:22:06,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:22:06,356 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-03 09:22:06,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 09:22:06,356 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-03 09:22:06,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-03 09:22:06,356 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:22:06,357 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1] [2018-10-03 09:22:06,357 INFO L423 AbstractCegarLoop]: === Iteration 39 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:22:06,357 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:22:06,357 INFO L82 PathProgramCache]: Analyzing trace with hash -559483260, now seen corresponding path program 38 times [2018-10-03 09:22:06,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:22:06,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:22:06,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:06,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:22:06,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:06,363 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:22:06,363 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:22:06,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:22:06,378 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:22:07,360 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:22:07,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:22:07,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:22:08,546 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 09:22:08,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:22:08,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-03 09:22:08,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 09:22:08,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 09:22:08,567 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:22:08,567 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-10-03 09:22:09,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:22:09,939 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-03 09:22:09,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 09:22:09,940 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-10-03 09:22:09,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:22:09,941 INFO L225 Difference]: With dead ends: 46 [2018-10-03 09:22:09,941 INFO L226 Difference]: Without dead ends: 44 [2018-10-03 09:22:09,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 1.0s impTime 41 [2018-10-03 09:22:09,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-03 09:22:09,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-03 09:22:09,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-03 09:22:09,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-03 09:22:09,946 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-03 09:22:09,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:22:09,946 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-03 09:22:09,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 09:22:09,946 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-03 09:22:09,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-03 09:22:09,946 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:22:09,946 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1] [2018-10-03 09:22:09,947 INFO L423 AbstractCegarLoop]: === Iteration 40 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:22:09,947 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:22:09,947 INFO L82 PathProgramCache]: Analyzing trace with hash -164113851, now seen corresponding path program 39 times [2018-10-03 09:22:09,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:22:09,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:22:09,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:09,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:22:09,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:09,953 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:22:09,953 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:22:09,953 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 09:22:09,961 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:22:11,017 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-03 09:22:11,017 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:22:11,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:22:12,267 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 09:22:12,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:22:12,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-03 09:22:12,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 09:22:12,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 09:22:12,288 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:22:12,288 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-10-03 09:22:13,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:22:13,643 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-03 09:22:13,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 09:22:13,644 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-10-03 09:22:13,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:22:13,644 INFO L225 Difference]: With dead ends: 47 [2018-10-03 09:22:13,644 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 09:22:13,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 1.1s impTime 42 [2018-10-03 09:22:13,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 09:22:13,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-03 09:22:13,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-03 09:22:13,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-03 09:22:13,649 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-03 09:22:13,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:22:13,649 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-03 09:22:13,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 09:22:13,649 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-03 09:22:13,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-03 09:22:13,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:22:13,650 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1] [2018-10-03 09:22:13,650 INFO L423 AbstractCegarLoop]: === Iteration 41 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:22:13,650 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:22:13,650 INFO L82 PathProgramCache]: Analyzing trace with hash -792564060, now seen corresponding path program 40 times [2018-10-03 09:22:13,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:22:13,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:22:13,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:13,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:22:13,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:13,656 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:22:13,656 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:22:13,657 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 09:22:13,668 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:22:15,001 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:22:15,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:22:15,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:22:16,302 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 09:22:16,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:22:16,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-10-03 09:22:16,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 09:22:16,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 09:22:16,324 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:22:16,324 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-10-03 09:22:17,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:22:17,690 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-03 09:22:17,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 09:22:17,691 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-10-03 09:22:17,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:22:17,691 INFO L225 Difference]: With dead ends: 48 [2018-10-03 09:22:17,691 INFO L226 Difference]: Without dead ends: 46 [2018-10-03 09:22:17,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.1s impTime 43 [2018-10-03 09:22:17,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-03 09:22:17,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-03 09:22:17,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-03 09:22:17,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-03 09:22:17,696 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-03 09:22:17,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:22:17,696 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-03 09:22:17,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 09:22:17,696 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-03 09:22:17,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-03 09:22:17,697 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:22:17,697 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1] [2018-10-03 09:22:17,697 INFO L423 AbstractCegarLoop]: === Iteration 42 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:22:17,697 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:22:17,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1200315941, now seen corresponding path program 41 times [2018-10-03 09:22:17,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:22:17,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:22:17,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:17,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:22:17,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:17,703 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:22:17,704 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:22:17,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:22:17,711 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:22:19,207 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-03 09:22:19,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:22:19,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:22:20,643 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 09:22:20,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:22:20,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-03 09:22:20,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-03 09:22:20,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-03 09:22:20,664 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:22:20,664 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-10-03 09:22:22,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:22:22,140 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-03 09:22:22,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 09:22:22,141 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-10-03 09:22:22,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:22:22,141 INFO L225 Difference]: With dead ends: 49 [2018-10-03 09:22:22,142 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 09:22:22,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.3s impTime 44 [2018-10-03 09:22:22,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 09:22:22,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-03 09:22:22,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-03 09:22:22,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-03 09:22:22,146 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-03 09:22:22,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:22:22,146 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-03 09:22:22,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-03 09:22:22,147 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-03 09:22:22,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-03 09:22:22,147 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:22:22,147 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1] [2018-10-03 09:22:22,147 INFO L423 AbstractCegarLoop]: === Iteration 43 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:22:22,147 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:22:22,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1444913468, now seen corresponding path program 42 times [2018-10-03 09:22:22,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:22:22,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:22:22,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:22,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:22:22,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:22,153 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:22:22,154 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:22:22,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:22:22,161 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:22:23,929 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-03 09:22:23,930 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:22:23,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:22:25,365 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 09:22:25,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:22:25,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-10-03 09:22:25,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 09:22:25,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 09:22:25,385 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:22:25,385 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-10-03 09:22:26,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:22:26,886 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-03 09:22:26,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 09:22:26,887 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-10-03 09:22:26,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:22:26,888 INFO L225 Difference]: With dead ends: 50 [2018-10-03 09:22:26,888 INFO L226 Difference]: Without dead ends: 48 [2018-10-03 09:22:26,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.3s impTime 45 [2018-10-03 09:22:26,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-03 09:22:26,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-03 09:22:26,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-03 09:22:26,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-03 09:22:26,893 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-03 09:22:26,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:22:26,893 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-03 09:22:26,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 09:22:26,893 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-03 09:22:26,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-03 09:22:26,894 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:22:26,894 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1] [2018-10-03 09:22:26,894 INFO L423 AbstractCegarLoop]: === Iteration 44 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:22:26,894 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:22:26,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1842646523, now seen corresponding path program 43 times [2018-10-03 09:22:26,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:22:26,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:22:26,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:26,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:22:26,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:26,901 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:22:26,901 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:22:26,902 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 09:22:26,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:22:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:22:28,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:22:30,121 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 09:22:30,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:22:30,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-03 09:22:30,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 09:22:30,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 09:22:30,141 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:22:30,141 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-10-03 09:22:31,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:22:31,710 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-03 09:22:31,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 09:22:31,711 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-10-03 09:22:31,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:22:31,712 INFO L225 Difference]: With dead ends: 51 [2018-10-03 09:22:31,712 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 09:22:31,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.3s impTime 46 [2018-10-03 09:22:31,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 09:22:31,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-03 09:22:31,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-03 09:22:31,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-03 09:22:31,717 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-03 09:22:31,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:22:31,717 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-03 09:22:31,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 09:22:31,718 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-03 09:22:31,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-03 09:22:31,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:22:31,718 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1] [2018-10-03 09:22:31,718 INFO L423 AbstractCegarLoop]: === Iteration 45 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:22:31,718 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:22:31,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1287469340, now seen corresponding path program 44 times [2018-10-03 09:22:31,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:22:31,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:22:31,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:31,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:22:31,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:31,725 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:22:31,726 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:22:31,726 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 09:22:31,740 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:22:33,417 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:22:33,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:22:33,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:22:34,954 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 09:22:34,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:22:34,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-10-03 09:22:34,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 09:22:34,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 09:22:34,976 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:22:34,976 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-10-03 09:22:36,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:22:36,691 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-03 09:22:36,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 09:22:36,692 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-10-03 09:22:36,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:22:36,692 INFO L225 Difference]: With dead ends: 52 [2018-10-03 09:22:36,693 INFO L226 Difference]: Without dead ends: 50 [2018-10-03 09:22:36,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.4s impTime 47 [2018-10-03 09:22:36,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-03 09:22:36,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-03 09:22:36,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-03 09:22:36,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-03 09:22:36,698 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-03 09:22:36,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:22:36,698 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-03 09:22:36,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 09:22:36,698 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-03 09:22:36,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-03 09:22:36,699 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:22:36,699 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1] [2018-10-03 09:22:36,699 INFO L423 AbstractCegarLoop]: === Iteration 46 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:22:36,699 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:22:36,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1256845851, now seen corresponding path program 45 times [2018-10-03 09:22:36,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:22:36,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:22:36,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:36,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:22:36,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:36,705 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:22:36,705 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:22:36,705 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 09:22:36,720 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:22:38,812 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-03 09:22:38,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:22:38,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:22:40,468 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 09:22:40,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:22:40,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-03 09:22:40,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-03 09:22:40,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-03 09:22:40,489 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:22:40,489 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-10-03 09:22:42,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:22:42,218 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-03 09:22:42,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 09:22:42,218 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-10-03 09:22:42,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:22:42,219 INFO L225 Difference]: With dead ends: 53 [2018-10-03 09:22:42,219 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 09:22:42,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.4s impTime 48 [2018-10-03 09:22:42,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 09:22:42,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-03 09:22:42,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-03 09:22:42,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-03 09:22:42,224 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-03 09:22:42,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:22:42,224 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-03 09:22:42,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-03 09:22:42,224 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-03 09:22:42,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-03 09:22:42,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:22:42,225 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2018-10-03 09:22:42,225 INFO L423 AbstractCegarLoop]: === Iteration 47 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:22:42,225 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:22:42,225 INFO L82 PathProgramCache]: Analyzing trace with hash -307517692, now seen corresponding path program 46 times [2018-10-03 09:22:42,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:22:42,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:22:42,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:42,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:22:42,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:42,231 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:22:42,231 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:22:42,232 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 09:22:42,240 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:22:44,541 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:22:44,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:22:44,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:22:46,263 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 09:22:46,282 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:22:46,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-10-03 09:22:46,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 09:22:46,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 09:22:46,283 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:22:46,283 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-10-03 09:22:48,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:22:48,051 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-03 09:22:48,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 09:22:48,051 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-10-03 09:22:48,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:22:48,052 INFO L225 Difference]: With dead ends: 54 [2018-10-03 09:22:48,052 INFO L226 Difference]: Without dead ends: 52 [2018-10-03 09:22:48,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.5s impTime 49 [2018-10-03 09:22:48,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-03 09:22:48,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-03 09:22:48,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-03 09:22:48,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-03 09:22:48,058 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-03 09:22:48,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:22:48,058 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-03 09:22:48,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 09:22:48,058 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-03 09:22:48,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-03 09:22:48,059 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:22:48,059 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1] [2018-10-03 09:22:48,059 INFO L423 AbstractCegarLoop]: === Iteration 48 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:22:48,059 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:22:48,059 INFO L82 PathProgramCache]: Analyzing trace with hash -943115835, now seen corresponding path program 47 times [2018-10-03 09:22:48,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:22:48,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:22:48,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:48,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:22:48,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:48,066 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:22:48,066 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:22:48,066 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 09:22:48,090 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:22:50,961 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-03 09:22:50,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:22:50,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:22:52,660 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 09:22:52,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:22:52,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-10-03 09:22:52,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-03 09:22:52,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-03 09:22:52,680 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:22:52,680 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-10-03 09:22:54,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:22:54,536 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-03 09:22:54,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 09:22:54,537 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-10-03 09:22:54,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:22:54,538 INFO L225 Difference]: With dead ends: 55 [2018-10-03 09:22:54,538 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 09:22:54,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.5s impTime 50 [2018-10-03 09:22:54,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 09:22:54,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-03 09:22:54,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-03 09:22:54,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-03 09:22:54,543 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-03 09:22:54,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:22:54,543 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-03 09:22:54,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-03 09:22:54,543 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-03 09:22:54,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-03 09:22:54,543 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:22:54,543 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1] [2018-10-03 09:22:54,544 INFO L423 AbstractCegarLoop]: === Iteration 49 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:22:54,544 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:22:54,544 INFO L82 PathProgramCache]: Analyzing trace with hash 828178212, now seen corresponding path program 48 times [2018-10-03 09:22:54,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:22:54,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:22:54,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:54,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:22:54,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:54,550 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:22:54,550 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:22:54,550 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 09:22:54,559 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:22:57,286 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-03 09:22:57,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:22:57,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:22:59,111 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 09:22:59,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:22:59,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-10-03 09:22:59,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 09:22:59,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 09:22:59,133 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:22:59,133 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-10-03 09:23:01,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:23:01,080 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-03 09:23:01,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 09:23:01,081 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-10-03 09:23:01,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:23:01,082 INFO L225 Difference]: With dead ends: 56 [2018-10-03 09:23:01,082 INFO L226 Difference]: Without dead ends: 54 [2018-10-03 09:23:01,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.7s impTime 51 [2018-10-03 09:23:01,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-03 09:23:01,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-03 09:23:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-03 09:23:01,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-03 09:23:01,087 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-03 09:23:01,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:23:01,087 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-03 09:23:01,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 09:23:01,088 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-03 09:23:01,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-03 09:23:01,088 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:23:01,088 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1] [2018-10-03 09:23:01,088 INFO L423 AbstractCegarLoop]: === Iteration 50 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:23:01,089 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:23:01,089 INFO L82 PathProgramCache]: Analyzing trace with hash -96281179, now seen corresponding path program 49 times [2018-10-03 09:23:01,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:23:01,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:23:01,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:23:01,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:23:01,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:23:01,095 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:23:01,096 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:23:01,096 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 09:23:01,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:23:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:23:03,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:23:05,659 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 09:23:05,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:23:05,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-03 09:23:05,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 09:23:05,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 09:23:05,679 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:23:05,679 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-10-03 09:23:07,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:23:07,679 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-03 09:23:07,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 09:23:07,681 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-10-03 09:23:07,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:23:07,681 INFO L225 Difference]: With dead ends: 57 [2018-10-03 09:23:07,682 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 09:23:07,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.8s impTime 52 [2018-10-03 09:23:07,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 09:23:07,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-03 09:23:07,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-03 09:23:07,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-03 09:23:07,686 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-03 09:23:07,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:23:07,686 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-03 09:23:07,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 09:23:07,686 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-03 09:23:07,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-03 09:23:07,687 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:23:07,687 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1] [2018-10-03 09:23:07,687 INFO L423 AbstractCegarLoop]: === Iteration 51 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:23:07,687 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:23:07,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1310248772, now seen corresponding path program 50 times [2018-10-03 09:23:07,688 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:23:07,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:23:07,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:23:07,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:23:07,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:23:07,695 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:23:07,695 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:23:07,695 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) [2018-10-03 09:23:07,708 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 09:23:10,524 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:23:10,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:23:10,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:23:12,467 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 09:23:12,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:23:12,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-10-03 09:23:12,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 09:23:12,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 09:23:12,489 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:23:12,489 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-10-03 09:23:14,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:23:14,619 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-03 09:23:14,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 09:23:14,619 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-10-03 09:23:14,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:23:14,620 INFO L225 Difference]: With dead ends: 58 [2018-10-03 09:23:14,620 INFO L226 Difference]: Without dead ends: 56 [2018-10-03 09:23:14,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.7s impTime 53 [2018-10-03 09:23:14,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-03 09:23:14,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-03 09:23:14,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-03 09:23:14,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-03 09:23:14,625 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-03 09:23:14,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:23:14,625 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-03 09:23:14,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 09:23:14,625 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-03 09:23:14,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-03 09:23:14,626 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:23:14,626 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1] [2018-10-03 09:23:14,626 INFO L423 AbstractCegarLoop]: === Iteration 52 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:23:14,626 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:23:14,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1963004293, now seen corresponding path program 51 times [2018-10-03 09:23:14,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:23:14,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:23:14,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:23:14,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:23:14,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:23:14,633 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:23:14,634 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:23:14,634 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 09:23:14,653 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:23:17,874 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-03 09:23:17,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:23:17,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:23:19,873 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 09:23:19,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:23:19,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-03 09:23:19,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-03 09:23:19,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-03 09:23:19,893 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:23:19,894 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-10-03 09:23:22,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:23:22,045 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-03 09:23:22,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 09:23:22,046 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-10-03 09:23:22,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:23:22,047 INFO L225 Difference]: With dead ends: 59 [2018-10-03 09:23:22,047 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 09:23:22,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.8s impTime 54 [2018-10-03 09:23:22,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 09:23:22,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-03 09:23:22,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-03 09:23:22,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-03 09:23:22,052 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-03 09:23:22,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:23:22,053 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-03 09:23:22,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-03 09:23:22,053 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-03 09:23:22,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-03 09:23:22,053 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:23:22,053 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1] [2018-10-03 09:23:22,054 INFO L423 AbstractCegarLoop]: === Iteration 53 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:23:22,054 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:23:22,054 INFO L82 PathProgramCache]: Analyzing trace with hash 723588964, now seen corresponding path program 52 times [2018-10-03 09:23:22,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:23:22,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:23:22,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:23:22,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:23:22,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:23:22,060 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:23:22,061 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:23:22,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:23:22,069 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:23:25,254 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:23:25,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:23:25,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:23:27,315 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 09:23:27,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:23:27,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-10-03 09:23:27,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 09:23:27,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 09:23:27,335 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:23:27,335 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-10-03 09:23:29,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:23:29,566 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-03 09:23:29,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 09:23:29,567 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-10-03 09:23:29,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:23:29,568 INFO L225 Difference]: With dead ends: 60 [2018-10-03 09:23:29,568 INFO L226 Difference]: Without dead ends: 58 [2018-10-03 09:23:29,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.9s impTime 55 [2018-10-03 09:23:29,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-03 09:23:29,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-03 09:23:29,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-03 09:23:29,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-03 09:23:29,574 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-03 09:23:29,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:23:29,574 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-03 09:23:29,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 09:23:29,574 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-03 09:23:29,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-03 09:23:29,574 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:23:29,574 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1] [2018-10-03 09:23:29,575 INFO L423 AbstractCegarLoop]: === Iteration 54 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:23:29,575 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:23:29,575 INFO L82 PathProgramCache]: Analyzing trace with hash 956419429, now seen corresponding path program 53 times [2018-10-03 09:23:29,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:23:29,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:23:29,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:23:29,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:23:29,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:23:29,580 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:23:29,580 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:23:29,580 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:23:29,587 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:23:33,574 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-03 09:23:33,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:23:33,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:23:35,717 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 09:23:35,738 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:23:35,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-03 09:23:35,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-03 09:23:35,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-03 09:23:35,739 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:23:35,739 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-10-03 09:23:38,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:23:38,067 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-03 09:23:38,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-03 09:23:38,068 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-10-03 09:23:38,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:23:38,069 INFO L225 Difference]: With dead ends: 61 [2018-10-03 09:23:38,069 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 09:23:38,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.9s impTime 56 [2018-10-03 09:23:38,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 09:23:38,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-03 09:23:38,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-03 09:23:38,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-03 09:23:38,074 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-03 09:23:38,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:23:38,074 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-03 09:23:38,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-03 09:23:38,074 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-03 09:23:38,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-03 09:23:38,074 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:23:38,074 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1] [2018-10-03 09:23:38,074 INFO L423 AbstractCegarLoop]: === Iteration 55 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:23:38,075 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:23:38,075 INFO L82 PathProgramCache]: Analyzing trace with hash -415770748, now seen corresponding path program 54 times [2018-10-03 09:23:38,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:23:38,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:23:38,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:23:38,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:23:38,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:23:38,082 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:23:38,082 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:23:38,082 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 09:23:38,098 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:23:42,429 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-03 09:23:42,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:23:42,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:23:44,619 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 09:23:44,639 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:23:44,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-10-03 09:23:44,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-03 09:23:44,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-03 09:23:44,640 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:23:44,640 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-10-03 09:23:47,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:23:47,062 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-03 09:23:47,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-03 09:23:47,063 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-10-03 09:23:47,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:23:47,063 INFO L225 Difference]: With dead ends: 62 [2018-10-03 09:23:47,064 INFO L226 Difference]: Without dead ends: 60 [2018-10-03 09:23:47,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 2.0s impTime 57 [2018-10-03 09:23:47,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-03 09:23:47,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-03 09:23:47,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-03 09:23:47,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-03 09:23:47,068 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-03 09:23:47,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:23:47,069 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-03 09:23:47,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-03 09:23:47,069 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-03 09:23:47,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-03 09:23:47,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:23:47,069 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1] [2018-10-03 09:23:47,069 INFO L423 AbstractCegarLoop]: === Iteration 56 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:23:47,069 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:23:47,069 INFO L82 PathProgramCache]: Analyzing trace with hash -3993275, now seen corresponding path program 55 times [2018-10-03 09:23:47,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:23:47,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:23:47,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:23:47,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:23:47,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:23:47,075 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:23:47,075 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:23:47,075 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 09:23:47,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:23:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:23:50,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:23:53,011 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 09:23:53,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:23:53,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-03 09:23:53,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 09:23:53,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 09:23:53,032 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:23:53,032 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-10-03 09:23:55,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:23:55,472 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-03 09:23:55,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 09:23:55,472 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-10-03 09:23:55,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:23:55,473 INFO L225 Difference]: With dead ends: 63 [2018-10-03 09:23:55,473 INFO L226 Difference]: Without dead ends: 61 [2018-10-03 09:23:55,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 2.1s impTime 58 [2018-10-03 09:23:55,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-03 09:23:55,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-03 09:23:55,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-03 09:23:55,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-03 09:23:55,479 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-03 09:23:55,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:23:55,480 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-03 09:23:55,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 09:23:55,480 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-03 09:23:55,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-03 09:23:55,480 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:23:55,480 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1] [2018-10-03 09:23:55,480 INFO L423 AbstractCegarLoop]: === Iteration 57 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:23:55,480 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:23:55,480 INFO L82 PathProgramCache]: Analyzing trace with hash -123793500, now seen corresponding path program 56 times [2018-10-03 09:23:55,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:23:55,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:23:55,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:23:55,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:23:55,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:23:55,487 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:23:55,487 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:23:55,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:23:55,501 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:23:59,335 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:23:59,335 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:23:59,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:24:01,745 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 09:24:01,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:24:01,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-10-03 09:24:01,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-03 09:24:01,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-03 09:24:01,765 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:24:01,765 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-10-03 09:24:04,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:24:04,303 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-03 09:24:04,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-03 09:24:04,303 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-10-03 09:24:04,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:24:04,304 INFO L225 Difference]: With dead ends: 64 [2018-10-03 09:24:04,304 INFO L226 Difference]: Without dead ends: 62 [2018-10-03 09:24:04,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.1s impTime 59 [2018-10-03 09:24:04,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-03 09:24:04,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-03 09:24:04,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-03 09:24:04,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-03 09:24:04,309 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-03 09:24:04,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:24:04,309 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-03 09:24:04,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-03 09:24:04,310 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-03 09:24:04,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-03 09:24:04,310 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:24:04,310 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1] [2018-10-03 09:24:04,310 INFO L423 AbstractCegarLoop]: === Iteration 58 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:24:04,310 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:24:04,310 INFO L82 PathProgramCache]: Analyzing trace with hash 457366821, now seen corresponding path program 57 times [2018-10-03 09:24:04,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:24:04,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:24:04,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:24:04,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:24:04,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:24:04,317 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:24:04,317 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:24:04,317 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 09:24:04,330 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:24:09,382 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-03 09:24:09,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:24:09,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:24:12,048 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 09:24:12,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:24:12,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-03 09:24:12,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-03 09:24:12,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-03 09:24:12,069 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:24:12,069 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-10-03 09:24:14,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:24:14,689 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-03 09:24:14,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-03 09:24:14,690 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-10-03 09:24:14,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:24:14,691 INFO L225 Difference]: With dead ends: 65 [2018-10-03 09:24:14,691 INFO L226 Difference]: Without dead ends: 63 [2018-10-03 09:24:14,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.4s impTime 60 [2018-10-03 09:24:14,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-03 09:24:14,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-03 09:24:14,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-03 09:24:14,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-03 09:24:14,697 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-03 09:24:14,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:24:14,697 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-03 09:24:14,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-03 09:24:14,697 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-03 09:24:14,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-03 09:24:14,698 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:24:14,698 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1] [2018-10-03 09:24:14,698 INFO L423 AbstractCegarLoop]: === Iteration 59 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:24:14,698 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:24:14,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1293467588, now seen corresponding path program 58 times [2018-10-03 09:24:14,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:24:14,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:24:14,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:24:14,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:24:14,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:24:14,705 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:24:14,706 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:24:14,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:24:14,719 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:24:19,355 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:24:19,356 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:24:19,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:24:21,907 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 09:24:21,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:24:21,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-10-03 09:24:21,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-03 09:24:21,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-03 09:24:21,927 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:24:21,927 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-10-03 09:24:24,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:24:24,677 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-03 09:24:24,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-03 09:24:24,677 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-10-03 09:24:24,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:24:24,678 INFO L225 Difference]: With dead ends: 66 [2018-10-03 09:24:24,678 INFO L226 Difference]: Without dead ends: 64 [2018-10-03 09:24:24,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.3s impTime 61 [2018-10-03 09:24:24,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-03 09:24:24,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-03 09:24:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-03 09:24:24,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-03 09:24:24,684 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-03 09:24:24,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:24:24,685 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-03 09:24:24,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-03 09:24:24,685 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-03 09:24:24,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-03 09:24:24,685 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:24:24,685 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1] [2018-10-03 09:24:24,685 INFO L423 AbstractCegarLoop]: === Iteration 60 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:24:24,686 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:24:24,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1442787589, now seen corresponding path program 59 times [2018-10-03 09:24:24,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:24:24,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:24:24,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:24:24,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:24:24,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:24:24,693 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:24:24,693 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:24:24,693 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 09:24:24,708 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:24:30,701 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-03 09:24:30,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:24:30,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:24:33,329 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 09:24:33,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:24:33,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-03 09:24:33,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-03 09:24:33,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-03 09:24:33,351 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:24:33,351 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-10-03 09:24:36,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:24:36,136 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-03 09:24:36,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-03 09:24:36,136 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-10-03 09:24:36,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:24:36,137 INFO L225 Difference]: With dead ends: 67 [2018-10-03 09:24:36,137 INFO L226 Difference]: Without dead ends: 65 [2018-10-03 09:24:36,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.4s impTime 62 [2018-10-03 09:24:36,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-03 09:24:36,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-03 09:24:36,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-03 09:24:36,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-03 09:24:36,142 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-03 09:24:36,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:24:36,142 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-03 09:24:36,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-03 09:24:36,143 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-03 09:24:36,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-03 09:24:36,143 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:24:36,143 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1] [2018-10-03 09:24:36,143 INFO L423 AbstractCegarLoop]: === Iteration 61 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:24:36,143 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:24:36,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1776740324, now seen corresponding path program 60 times [2018-10-03 09:24:36,144 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:24:36,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:24:36,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:24:36,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:24:36,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:24:36,151 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:24:36,151 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:24:36,151 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 09:24:36,166 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:24:42,608 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-03 09:24:42,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:24:42,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:24:45,254 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 09:24:45,273 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:24:45,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-10-03 09:24:45,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-03 09:24:45,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-03 09:24:45,274 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:24:45,274 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-10-03 09:24:48,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:24:48,141 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-03 09:24:48,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-03 09:24:48,141 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-10-03 09:24:48,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:24:48,142 INFO L225 Difference]: With dead ends: 68 [2018-10-03 09:24:48,142 INFO L226 Difference]: Without dead ends: 66 [2018-10-03 09:24:48,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.5s impTime 63 [2018-10-03 09:24:48,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-03 09:24:48,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-03 09:24:48,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-03 09:24:48,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-03 09:24:48,148 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-03 09:24:48,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:24:48,148 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-03 09:24:48,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-03 09:24:48,148 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-03 09:24:48,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-03 09:24:48,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:24:48,148 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1] [2018-10-03 09:24:48,149 INFO L423 AbstractCegarLoop]: === Iteration 62 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:24:48,149 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:24:48,149 INFO L82 PathProgramCache]: Analyzing trace with hash -755626779, now seen corresponding path program 61 times [2018-10-03 09:24:48,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:24:48,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:24:48,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:24:48,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:24:48,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:24:48,157 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:24:48,157 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:24:48,158 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) [2018-10-03 09:24:48,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 09:24:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:24:54,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:24:56,729 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 09:24:56,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:24:56,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-03 09:24:56,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-03 09:24:56,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-03 09:24:56,749 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:24:56,749 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-10-03 09:24:59,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:24:59,723 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-03 09:24:59,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-03 09:24:59,723 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-10-03 09:24:59,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:24:59,724 INFO L225 Difference]: With dead ends: 69 [2018-10-03 09:24:59,724 INFO L226 Difference]: Without dead ends: 67 [2018-10-03 09:24:59,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.5s impTime 64 [2018-10-03 09:24:59,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-03 09:24:59,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-03 09:24:59,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-03 09:24:59,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-03 09:24:59,731 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-03 09:24:59,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:24:59,731 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-03 09:24:59,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-03 09:24:59,731 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-03 09:24:59,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-03 09:24:59,732 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:24:59,732 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1] [2018-10-03 09:24:59,732 INFO L423 AbstractCegarLoop]: === Iteration 63 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:24:59,732 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:24:59,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1949595644, now seen corresponding path program 62 times [2018-10-03 09:24:59,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:24:59,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:24:59,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:24:59,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:24:59,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:24:59,739 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:24:59,739 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:24:59,739 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 09:24:59,755 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:25:05,724 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:25:05,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:25:05,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:25:08,537 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 09:25:08,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:25:08,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-10-03 09:25:08,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-03 09:25:08,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-03 09:25:08,557 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:25:08,557 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-10-03 09:25:11,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:25:11,595 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-03 09:25:11,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-03 09:25:11,595 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-10-03 09:25:11,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:25:11,596 INFO L225 Difference]: With dead ends: 70 [2018-10-03 09:25:11,596 INFO L226 Difference]: Without dead ends: 68 [2018-10-03 09:25:11,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.6s impTime 65 [2018-10-03 09:25:11,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-03 09:25:11,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-03 09:25:11,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-03 09:25:11,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-03 09:25:11,602 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-03 09:25:11,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:25:11,602 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-03 09:25:11,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-03 09:25:11,602 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-03 09:25:11,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-03 09:25:11,602 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:25:11,602 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1] [2018-10-03 09:25:11,603 INFO L423 AbstractCegarLoop]: === Iteration 64 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:25:11,603 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:25:11,603 INFO L82 PathProgramCache]: Analyzing trace with hash -307924795, now seen corresponding path program 63 times [2018-10-03 09:25:11,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:25:11,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:25:11,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:25:11,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:25:11,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:25:11,610 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:25:11,611 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:25:11,611 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 09:25:11,635 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:25:19,515 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-03 09:25:19,515 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:25:19,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:25:22,555 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 09:25:22,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-03 09:25:22,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-03 09:25:22,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-03 09:25:22,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-03 09:25:22,575 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:25:22,575 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-10-03 09:25:25,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:25:25,710 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-03 09:25:25,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-03 09:25:25,711 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-10-03 09:25:25,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:25:25,712 INFO L225 Difference]: With dead ends: 71 [2018-10-03 09:25:25,712 INFO L226 Difference]: Without dead ends: 69 [2018-10-03 09:25:25,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.8s impTime 66 [2018-10-03 09:25:25,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-03 09:25:25,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-03 09:25:25,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-03 09:25:25,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-03 09:25:25,718 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-03 09:25:25,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:25:25,719 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-03 09:25:25,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-03 09:25:25,719 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-03 09:25:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-03 09:25:25,719 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:25:25,719 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1] [2018-10-03 09:25:25,720 INFO L423 AbstractCegarLoop]: === Iteration 65 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-03 09:25:25,720 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:25:25,720 INFO L82 PathProgramCache]: Analyzing trace with hash -955736028, now seen corresponding path program 64 times [2018-10-03 09:25:25,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:25:25,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:25:25,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:25:25,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:25:25,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:25:25,727 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-03 09:25:25,727 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-03 09:25:25,728 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 09:25:25,741 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Received shutdown request... [2018-10-03 09:25:32,685 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:25:32,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:25:32,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:25:32,753 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-03 09:25:32,954 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-03 09:25:32,954 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 09:25:32,960 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 09:25:32,960 INFO L202 PluginConnector]: Adding new model Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 09:25:32 BoogieIcfgContainer [2018-10-03 09:25:32,960 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 09:25:32,961 INFO L168 Benchmark]: Toolchain (without parser) took 264487.58 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 72.4 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -49.9 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2018-10-03 09:25:32,963 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.28 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 09:25:32,963 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.99 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 09:25:32,963 INFO L168 Benchmark]: Boogie Preprocessor took 22.95 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 09:25:32,964 INFO L168 Benchmark]: RCFGBuilder took 281.94 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-03 09:25:32,965 INFO L168 Benchmark]: TraceAbstraction took 264133.78 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 72.4 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -71.1 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2018-10-03 09:25:32,968 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.28 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.99 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.95 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 281.94 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 264133.78 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 72.4 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -71.1 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 9]: Timeout (TraceAbstraction) Unable to prove that procedure postcondition always holds (line 9). Cancelled while BasicCegarLoop was analyzing trace of length 69 with TraceHistMax 64, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 264.0s OverallTime, 65 OverallIterations, 64 TraceHistogramMax, 77.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 190 SDtfs, 71 SDslu, 64 SDs, 0 SdLazy, 100101 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 62.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2272 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 2209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=64, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 64 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 99.9s SatisfiabilityAnalysisTime, 75.8s InterpolantComputationTime, 2272 NumberOfCodeBlocks, 2272 NumberOfCodeBlocksAsserted, 592 NumberOfCheckSat, 2208 ConstructedInterpolants, 0 QuantifiedInterpolants, 1051678 SizeOfPredicates, 64 NumberOfNonLiveVariables, 10656 ConjunctsInSsa, 8448 ConjunctsInUnsatCore, 64 InterpolantComputations, 1 PerfectInterpolantSequences, 0/43680 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Mult1-Safe.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-03_09-25-32-978.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Mult1-Safe.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-03_09-25-32-978.csv Completed graceful shutdown